Low-Power, High-Speed CMOS Analog Switches

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					                                                                                                                 DG401/403/405
                                                                                                                  Vishay Siliconix

                  Low-Power, High-Speed CMOS Analog Switches


DESCRIPTION                                                                     FEATURES
The DG401/403/405 monolithic analog switches were                               • 44 V Supply Max Rating
designed to provide precision, high performance switching of                    • ± 15 V Analog Signal Range                         Pb-free
                                                                                                                                    Available
analog signals. Combining low power (0.35 µW, typ) with                         • On-Resistance - rDS(on): 30 Ω
high speed (tON: 75 ns, typ), the DG401 series is ideally                                                                         RoHS*
                                                                                • Low Leakage - ID(on): 40 pA                     COMPLIANT
suited for portable and battery powered industrial and
military applications.                                                          • Fast Switching - tON: 75 ns
                                                                                • Ultra Low Power
Built on the Vishay Siliconix proprietary high-voltage                            Requirements - PD: 0.35 µW
silicon-gate process to achieve high voltage rating and                         • TTL, CMOS Compatible
superior switch on/off performance, break-before-make is                        • Single Supply Capability
guaranteed for the SPDT configurations. An epitaxial layer
prevents latchup.                                                               BENEFITS
                                                                                • Wide Dynamic Range
Each switch conducts equally well in both directions when                       • Break-Before-Make Switching Action
on, and blocks up to 30 V peak-to-peak when off. On-                            • Simple Interfacing
resistance is very flat over the full ± 15 V analog range,
rivaling JFET performance without the inherent dynamic
                                                                                APPLICATIONS
range limitations.
                                                                                •    Audio and Video Switching
                                                                                •    Sample-and-Hold Circuits
The three devices in this series are differentiated by the type
of switch action as shown in the functional block diagrams.                     •    Battery Operation
                                                                                •    Test Equipment
                                                                                •    Communications Systems
                                                                                •    PBX, PABX




FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION


             DG401                                          DG401
      Dual-In-Line and SOIC                                   LCC
                                                  NC    D1    NC    S1    IN1
 D1                           S1        Key
       1                 16
                                                  3    2     1     20    19
 NC                           IN1
       2                 15
                                      NC      4                                 18    V-
 NC
       3                 14
                              V-                                                            Two SPST Switches per Package
                                      NC      5                                 17    GND
 NC
       4                 13
                              GND                                                             TRUTH TABLE
                                      NC      6                                 16    NC               Logic            Switch
 NC                           VL
       5                 12
                                              7                                 15                       0                  OFF
 NC                           V+      NC                                              VL
       6                 11                                                                              1                  ON
 NC                           IN2     NC      8                                 14    V+
       7                 10                                                                 Logic "0" ≤ 0.8 V
 D2                           S2                                                            Logic "1" ≥ 2.4 V
       8                  9                       9    10    11    12    13

                                                  NC    D2    NC    S2    IN2
             Top View                                       Top View




* Pb containing terminations are not RoHS compliant, exemptions may apply


Document Number: 70049                                                                                                      www.vishay.com
S-71155–Rev. H, 11-Jun-07                                                                                                                1
DG401/403/405
Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION




                                                        DG403
              DG403
                                                          LCC
       Dual-In-Line and SOIC                   NC D1 NC         S1    IN1
  D1                                 Key
       1                 16 S1                 3   2     1    20     19
 NC                            IN1                                                     Two SPDT Switches per Package
       2                 15          D3    4                                18   V-
  D3                           V-
       3                 14
                                     S3    5                                17   GND
                                                                                         TRUTH TABLE
  S3                           GND                                                           Logic         SW1, SW2       SW3, SW4
       4                 13                6                                16
                                     NC                                          NC
  S4
       5                 12
                               VL                                                              0             OFF              ON
                                           7                                15
                                     S4                                          VL            1             ON               OFF
  D4                           V+
       6                 11                8                                14
                                     D4                                          V+    Logic "0" ≤ 0.8 V
 NC                            IN2
       7                 10                                                            Logic "1" ≥ 2.4 V
  D2                           S2              9   10    11   12     13
       8                 9
                                               NC D2 NC         S2    IN2
             Top View                                   Top View




              DG405                                     DG405

       Dual-In-Line and SOIC                              LCC
                                               NC D1 NC         S1    IN1
  D1   1                 16 S1       Key
                                               3   2     1    20     19
 NC                            IN1
       2                 15
                                           4                                18         Two DPST Switches per Package
  D3                           V-    D3                                          V-
       3                 14
                                           5                                17           TRUTH TABLE
  S3                           GND   S3                                          GND
       4                 13                                                                        Logic               Switch
  S4                           VL    NC    6                                16   NC
       5                 12                                                                          0                  OFF
  D4                           V+          7                                15                       1                   ON
       6                 11          S4                                          VL

 NC                            IN2   D4    8                                14   V+    Logic "0" ≤ 0.8 V
       7                 10
                                                                                       Logic "1" ≥ 2.4 V
  D2   8                 9     S2
                                               9   10    11   12     13

                                               NC D2 NC         S2    IN2
             Top View                                   Top View




www.vishay.com                                                                                                 Document Number: 70049
2                                                                                                             S-71155–Rev. H, 11-Jun-07
                                                                                                              DG401/403/405
                                                                                                                  Vishay Siliconix

  ORDERING INFORMATION
       Temp Range                             Package                                               Part Number
  DG401
                                                                                                      DG401DJ
       - 40 to 85 °C                     16-Pin Plastic DIP
                                                                                                     DG401DJ-E3
  DG403
                                                                                                      DG403DJ
                                         16-Pin Plastic DIP
                                                                                                     DG403DJ-E3
                                                                                                     DG403DY
       - 40 to 85 °C
                                                                                                    DG403DY-E3
                                        16-Pin Narrow SOIC
                                                                                                    DG403DY-T1
                                                                                                   DG403DY-T1-E3
  DG405
                                                                                                      DG405DJ
                                         16-Pin Plastic DIP
                                                                                                     DG405DJ-E3
                                                                                                     DG405DY
       - 40 to 85 °C
                                                                                                    DG405DY-E3
                                        16-Pin Narrow SOIC
                                                                                                    DG405DY-T1
                                                                                                   DG405DY-T1-E3




  ABSOLUTE MAXIMUM RATINGS
  Parameter                                                                                           Limit                         Unit
  V+ to V-                                                                                              44
  GND to V-                                                                                             25
  VL                                                                                        (GND - 0.3) to (V+) + 0.3
                                                                                                                                     V
                                                                                              (V-) - 2 to (V+) + 2
  Digital Inputsa, VS, VD                                                                               or
                                                                                          30 mA, whichever occurs first
  Current (Any Terminal) Continuous                                                                     30
                                                                                                                                    mA
  Current, S or D (Pulsed 1 ms, 10 % duty)                                                             100
  Storage Temperature                 (DJ, DY Suffix)                                               - 65 to 125                      °C
                                      16-Pin Plastic   DIPc                                            450
  Power Dissipation (Package)b                                                                                                      mW
                                      16-Pin SOICd                                                     600

Notes:
a. Signals on SX, DX, or INX exceeding V+ or V– will be clamped by internal diodes. Limit forward diode current to maximum current ratings.
b. All leads welded or soldered to PC Board.
c. Derate 6 mW/°C above 75 °C.
d. Derate 7.6 mW/°C above 75 °C.




Document Number: 70049                                                                                                       www.vishay.com
S-71155–Rev. H, 11-Jun-07                                                                                                                 3
DG401/403/405
Vishay Siliconix

  SPECIFICATIONSa
                                                                         Test Conditions                                                    D Suffix
                                                                        Unless Specified                                                 - 40 to 85 °C
                                                                       V+ = 15 V, V– = - 15 V
  Parameter                                 Symbol                  VL = 5 V, VIN = 2.4 V, 0.8 Vf               Tempb        Typc       Mind      Maxd       Unit
  Analog Switch
  Analog Signal Rangee                      VANALOG                                                               Full                   - 15       15        V
  Drain-Source                                                       IS = - 10 mA, VD = ± 10 V                  Room          30                    45
                                             rDS(on)
  On-Resistance                                                      V+ = 13.5 V, V- = - 13.5 V                  Full                               55
                                                                                                                                                              Ω
  Δ Drain-Source                                                   IS = - 10 mA, VD = ± 5 V, 0 V                Room           3                     3
                                             ΔrDS(on)
  On-Resistance                                                      V+ = 16.5 V, V- = - 16.5 V                  Full                                5
                                                                                                                Room        - 0.01      - 0.5       0.5
                                              IS(off)
                                                                    V+ = 16.5 V, V- = - 16.5 V                   Hot                     -5          5
  Switch Off Leakage Current
                                                                   VD = ± 15.5 V, VS = ± 15.5 V                 Room        - 0.01      - 0.5       0.5
                                              ID(off)                                                                                                         nA
                                                                                                                 Hot                     -5          5
                                                                     V+ = 16.5 V, V- = - 16.5 V                 Room        - 0.04        -1         1
  Channel On Leakage Current                  ID(on)
                                                                       VS = VD = ± 15.5 V                        Hot                     - 10       10
  Digital Control
                                                                       VIN under test = 0.8 V
  Input Current VIN Low                         IIL                                                               Full      0.005        -1          1
                                                                         All Other = 2.4 V
                                                                                                                                                              µA
                                                                       VIN under test = 2.4 V
  Input Current VIN High                        IIH                                                               Full      0.005        -1          1
                                                                         All Other = 0.8 V
  Dynamic Characteristics
  Turn-On Time                                 tON                    RL = 300 Ω, CL = 35 pF                    Room          75                   150
  Turn-Off Time                                tOFF                        See Figure 2                         Room          30                   100
                                                                                                                                                              ns
  Break-Before-Make
                                                tD                    RL = 300 Ω, CL = 35 pF                    Room          35          5
  Time Delay (DG403)
                                                                            CL = 10 nF
  Charge Injection                              Q                                                               Room          60                             pC
                                                                       Vgen = 0 V, Rgen = 0 Ω
  Off Isolation Reject Ratio                  OIRR                     RL = 100 Ω, CL = 5 pF                    Room          72
                                                                                                                                                              dB
  Channel-to-Channel Crosstalk                XTALK                          f = 1 MHz                          Room          90
  Source Off Capacitance                      CS(off)                                                           Room          12
  Drain Off Capacitance                       CD(off)                   f = 1 MHz, VS = 0 V                     Room          12                              pF
  Channel On Capacitance                   CD, CS(on)                                                           Room          39
  Power Supplies
                                                                                                                Room         0.01                    1
  Positive Supply Current                       I+
                                                                                                                 Full                                5
                                                                                                                Room        - 0.01       -1
  Negative Supply Current                       I-
                                                                     V+ = 16.5 V, V- = - 16.5 V                  Full                    -5
                                                                                                                                                              µA
                                                                          VIN = 0 or 5 V                        Room         0.01                    1
  Logic Supply Current                          IL
                                                                                                                 Full                                5
                                                                                                                Room        - 0.01       -1
  Ground Current                              IGND
                                                                                                                 Full                    -5
Notes:
a. Refer to PROCESS OPTION FLOWCHART.
b. Room = 25 °C, Full = as determined by the operating temperature suffix.
c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
d. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
e. Guaranteed by design, not subject to production test.
f. VIN = input voltage to perform proper function.


Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.




www.vishay.com                                                                                                                        Document Number: 70049
4                                                                                                                                    S-71155–Rev. H, 11-Jun-07
                                                                                                                                                                                                                                  DG401/403/405
                                                                                                                                                                                                                                        Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
                                                              7                                                                                                                                  3.5
                                                                       V+ = 15 V
                                                              6        V- = -15 V                                                                                                                 3
                                                                                                                     SW1, 2
                                                              5                                                                                                                                  2.5

                                                                                                                                                                                                                                                VL = 7 V
                                                              4                                                                                                                                   2




                                                                                                                                                V TH (V)
        V T (V)




                                                                                                                              SW3, 4

                                                              3                                                                                                                                  1.5

                                                              2                                                                                                                                                                   VL = 5 V
                                                                                                                                                                                                  1

                                                              1                                                                                                                                  0.5

                                                              0                                                                                                                                   0
                                                                  0    2     4       6           8         10        12     14      16   18                                                             5         10         15         20          25       30         35
                                                                                    VL – Logic Supply (V)                                                                                                                              (V+)
                                                            Input Switching Threshold vs. Logic Supply Voltage                                                                                          Input Switching Threshold vs. Supply Voltages


                                                             50                                                                                                                                    60
                                                                                                     V+ = 15 V, V- = - 15 V
                                                                                                                                                                                                                  TA = 25 °C
     r DS(on) – Drain-Source On-Resistance ( Ω )




                                                                                                                                                    r DS(on) – Drain-Source On-Resistance (Ω )
                                                             45                                      VL = 5 V
                                                             40                                                                                                                                    50
                                                                                                                                                                                                                            ±6V
                                                             35                              85 °C
                                                             30                                                                                                                                   40                    ± 10 V
                                                                                             25 °C                                                                                                                    ± 12 V
                                                             25                                                                                                                                                      ± 15 V
                                                                                            0 °C                                                                                                               ± 20 V
                                                             20                                                                                                                                   30

                                                             15                              - 40 °C
                                                                                                                                                                                                            ± 22 V
                                                             10                                                                                                                                   20

                                                             5

                                                             0                                                                                                                                    10
                                                             - 15.0     - 10.0      - 5.0            0.0             5.0         10.0    15.0                                                           - 25         - 15         -5            5           15          26
                                                                                    VD – Drain Voltage (V)                                                                                                                   VD – Drain Voltage (V)
                                                                           rDS(on) vs. VD and Temperature                                                                                                      rDS(on) vs. VD and Power Supply Voltage

                                                            100                                                                                                                                   50
                                                                      TA = 25 °C
                                                                                                                                                                                                                                              CL = 10 nF
               r DS(on) – Drain-Source On-Resistance (Ω )




                                                            90
                                                                                                                                                                                                  40
                                                                                 7.5 V
                                                            80
                                                                                                                                                                                                  30
                                                            70                                                                                                                                                                                                   1 nF
                                                                                                                                                                                                  20
                                                                                         10 V
                                                            60
                                                                                                                                                 Q (pC)




                                                                                             12 V                                                                                                 10
                                                            50
                                                                                                       15 V
                                                                                                                                                                                                   0
                                                            40                                                       20 V
                                                                                                                                 22 V                                                                                                                     100 pF
                                                            30                                                                                                                                   - 10

                                                            20                                                                                                                                   - 20

                                                            10                                                                                                                                   - 30
                                                                  0         5               10                  15            20         25                                                          - 15         - 10       -5         0           5        10         15
                                                                                    VD – Drain Voltage (V)                                                                                                                  VS – Source Voltage (V )
                                                              rDS(on) vs. VD and Power Supply Voltage (V- = 0 V)                                                                                                 Charge Injection vs. Analog Voltage


Document Number: 70049                                                                                                                                                                                                                                   www.vishay.com
S-71155–Rev. H, 11-Jun-07                                                                                                                                                                                                                                             5
DG401/403/405
Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted
                           1000p                                                                                                           40
                                         V+ = 15 V
                                         V- = -15 V                                                                                                                                                    Id (off)
                                                                                                                                           20
                                         VL = 5 V                                                                                                     Id (on)
                                         VD = ± 14 V
                                                                                           Is (off)                                         0                                                                Is (off)
                            100p
  I D (off)




                                                                                                                    I S, I D (pA)
                                                                                                                                         - 20

                                          Id (on)
                                                                                                                                         - 40
                             10p
                                                                                                                                         - 60
                                                    Id (off)
                                                                                                                                         - 80

                                 1p                                                                                                      - 100
                                      - 40     - 20         0          20        40        60           80
                                                                                                                                             - 15.0        - 10.0      - 5.0        0.0        5.0         10.0      15.0
                                                               Temperature (°C)                                                                                 VD or V S – Drain or Source Voltage (V)
                                               Leakage Current vs. Temperature                                                                            Leakage Current vs. Analog Voltage

                         100 nA                                                                    I-                                     120
                                                V+ = 15 V
                                                V- = - 15 V                                                                                           V+ = 15 V
                                                VL = 5 V                                                                                              V- = - 15 V
                                                                                             I+                                           100         VL = 5 V                                       tON
                          1 nA
                                                                                                   IL                                      80                      VS = 10 V
                                                                                                                     t ON , t OFF (ns)
     I+, I-, IL (A)




                         100 pA                                                                                                            60                              VS = - 10 V

                                                                                                                                                                                                                  tOFF
                                                                                                                                                                  VS = 10 V
                                                                                                                                           40
                          10 pA

                                                                                                                                           20
                                                                                                                                                                 VS = -10 V

                          1 pA                                                                                                              0
                                  - 40       - 20       0         20        40        60          80         100                                 - 40      - 20        0        20     40       60           80          100
                                                            TA – Temperature (°C)                                                                                          TA – Temperature ( °C)
                                               Supply Current vs. Temperature                                                                               Switching Time vs. Temperature*

                            180                                                                                                           300
                                                      VS = 5 V
                            160                                                                                                           270              0V
                                                                                                                                                                                                           VS = 5 V
                            140                                                                                                           240
                                         VS = - 5 V
                                                                                                                                          210
                            120
     t ON , t OFF (ns)




                                                                                                                    t ON , t OFF (ns)




                                                                                                                                          180            -5V
                            100
                                                                                                                                          150
                             80                                                                                                                         - 15 V
                                                                                                        tON                               120
                             60
                                                                                                                                           90
                                                     VS = 5 V
                             40                                                                                                                                                                                   tON
                                                                                                                                           60                           - 15 V
                                                                                                        tOFF                                              -5V
                             20                                                                                                                                                                                   tOFF
                                                            VS = - 5 V                                                                     30
                                                                                                                                                                0V
                              0                                                                                                             0
                                   0            ±5              ± 10        ± 15           ± 20              ± 25                                 0               5            10         15           20                25
                                              V+, V– Positive and Negative Supplies (V)                                                                                V+ – Positive Supply (V)
                                         Switching Time vs. Power Supply Voltage*                                                                 Switching Time vs. Positive Supply Voltage*
*Refer to Figure 2 for test conditions.

www.vishay.com                                                                                                                                                                       Document Number: 70049
6                                                                                                                                                                                   S-71155–Rev. H, 11-Jun-07
                                                                                                                DG401/403/405
                                                                                                                 Vishay Siliconix
TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted


                                                 100 mA


                                                 10 mA


                                                  1 mA




                            Supply Current (A)
                                                 100 μA


                                                  10 μA


                                                   1 μA


                                                 100 nA


                                                  10 nA
                                                          10      100       1K        10K     100K   1M   10M
                                                                                 Frequency (Hz)
                                                               Supply Current vs. Switching Frequency




SCHEMATIC DIAGRAM (TYPICAL CHANNEL)




              V+

                                                                                                                              S

             VL
                                                                                                                     V–
                                                                   Level
                                                                   Shift/
            VIN
                                                                   Drive
                                                                                                                     V+

            GND
                                                                                                                              D

              V–


                                                                                  Figure 1.




Document Number: 70049                                                                                                    www.vishay.com
S-71155–Rev. H, 11-Jun-07                                                                                                              7
DG401/403/405
Vishay Siliconix
TEST CIRCUITS
VO is the steady state output with the switch on. Feedthrough via switch capacitance may result in spikes at the leading and
trailing edge of the output waveform.



                                                                                                                                                                  tf < 20 ns
                                                                                                         Logic                                                    tf < 20 ns
                                                                                                                                           50 %
           +5V                + 15 V                                                                     Input
                                                                                                                          0V
                     VL                  V+                                                                                                                tOFF
                                                                                                         Switch
                                                                                                                          VS
                S                             D                                                          Input*
 ± 10 V                                                                      VO                                                                                  VO
                                                                                                                                                  90 %

                IN
                                                          RL           CL
                                                                                                         Switch           0V
                                                          1 kΩ         35 pF
                 GND                     V-                                                              Output                                     tON
                                                                                                                                                                           90 %
                                                                                                                                      VO
                                                                                                         Switch          -V S
                                     - 15 V                                                              Input*

                CL (includes fixture and stray capacitance)                                           * VS = 10 V for t ON, V S = - 10 V for tOFF
                                                    RL                                                Note:   Logic input waveform is inverted for switches that
                          VO = V S
                                                                                                              have the opposite logic sense control
                                                  RL + rDS(on)

                                                                                      Figure 2. Switching Time



          +5V                  + 15 V                                                                                           3V
                                                                                                                 Logic
                                                                                                                 Input                         50 %
                VL                        V+
                                                                                                                                 0V
           S1                                  D1                                                                               VS1
VS1                                                                                             VO1
                                                                                                                                VO1
                                                                                                                                                          90 %
           S2                                  D2                     VO2
VS2
                                                                                                                 Switch          0V
                                                                                                                 Output
           IN                                                                                                                   VS2
                                                                               RL1        CL1                                   VO2           90 %
            GND                           V-
                                                              RL 2
                                                               L2    CL2                                         Switch         0V
                                                                                                                                               tD                     tD
                                                                                                                 Output
                                         - 15 V

                          CL (includes fixture and stray capacitance)

                                                                                   Figure 3. Break-Before-Make




                                +5V                   + 15 V



                                    VL                   V+                                                                            ΔVO
                Rg
                                S                             D                                               VO
                                                                                     VO

  Vg                            IN                                          CL                                IN
            3V                                                             10 nF                                          On                                          On
                                                                                                                                              Off
                                GND                      V-
                                                                                                                                           Q = ΔVO x CL


                                                      - 15 V
                                                                                      Figure 4. Charge Injection




www.vishay.com                                                                                                                                     Document Number: 70049
8                                                                                                                                                 S-71155–Rev. H, 11-Jun-07
                                                                                                                                 DG401/403/405
                                                                                                                                     Vishay Siliconix
TEST CIRCUITS

                                                                                                                     +5V                 + 15 V
                                                                                                            C                                            C
                                       +5V         + 15 V
                                                                                                                        VL                V+
                             C                                       C
                                                                                   VS                              S1                          D

                                        VL            V+                                Rg = 50 Ω
                                 S                           D            VO
  VS                                                                                                                                                                 50 Ω
                                                                                        VO                         S2
       Rg = 50 Ω                                                         RL
                                 IN                                      100 Ω
           0 V, 2.4 V                                                                    RL
                                                                                                                   IN
                                                                                                   0.8 V
                                      GND             V-         C
                                                                                                                     GND                  V-             C


                                                    - 15 V
                                                                                                                                         - 15 V
                                                                 VS
                                      Off Isolation = 20 log                                                                                       VS
                                                                 VO                                              XTALK Isolation = 20 log
                                                                                                                                                   VO
                                 C = RF bypass                                                             C = RF bypass

                         Figure 5. Off Isolation                                                                Figure 7. Crosstalk




                                                                                                       +5V           + 15 V
                                      +5V          + 15 V
                         C                                       C                            C                                      C

                                                                                                       VL                V+
                                       VL            V+                                                                          S
  VS                         S                              D            VO
                                                                                                                                                             Meter
       Rg = 50 Ω
                                                                         RL                       IN                                                      HP4192A
                             IN                                          100 Ω   0 V, 2.4 V                                                              Impedance
         0 V, 2.4 V                                                                                                                                       Analyzer
                                                                                                                                 D                      or Equivalent
                                      GND            V-          C
                                                                                                       GND               V-                              f = 1 MHz
                                                                                                                                     C

                                                   - 15 V
         C = RF bypass
                                                                                                                        - 15 V



                        Figure 6. Insertion Loss                                                            Figure 8. Capacitances




Document Number: 70049                                                                                                                             www.vishay.com
S-71155–Rev. H, 11-Jun-07                                                                                                                                       9
DG401/403/405
Vishay Siliconix
APPLICATIONS

                                 +5V       + 15 V
                                                                                                 +5V         + 15 V


                                     VL     V+                                                    VL            V+                        eout
                    Left        S1            D1                                                S1                   D1            +
                                                                         ein                                                       -
       Source 1                 S3            D3        Left
                                                                                                S3                   D3
                    Right
                                IN1                                                             IN1
                    Left
                                                                                                                          C1
                                S2            D2                                                S2
                                                                             Integrate/                              D2
       Source 2
                                                        Right                Reset
                    Right       S4            D4                                                S4                   D4
                                                                 TTL

                                                                                                                          C2
                                IN2                                                             IN2
              TTL
                                          DG403
                    Channel                                                                             DG403
                    Select       GND        V-                                 Slope            GND             V-
                                                                               Select

                                           - 15 V                                                            - 15 V
                     Figure 9. Stereo Source Selector                                      Figure 10. Dual Slope Integrator




Dual Slope Integrators:

The DG403 is well suited to configure a selectable slope                                   +5V         + 15 V
integrator. One control signal selects the timing capacitor C1
or C2. Another one selects ein or discharges the capacitor in                               VL          V+
preparation for the next integration cycle.
                                                                                          S1                 D1

                                                                                          S3                 D3
Band-Pass Switched Capacitor Filter:
                                                                                          IN1

Single-pole double-throw switches are a common element                                    S2                 D2
for switched capacitor networks and filters. The fast                  ein
switching times and low leakage of the DG403 allow for                                    S4                 D4
higher clock rates and consequently higher filter operating
frequencies.
                                                                                          IN2

                                                                   Clock                              DG403
                                                                                           GND          V-



                                                                                                       - 15 V
                                                                                                                               +
                                                                                                                                          eout
                                                                                                                               -


                                                                                    Figure 11. Band-Pass Switched Capacitor Filter




www.vishay.com                                                                                                         Document Number: 70049
10                                                                                                                    S-71155–Rev. H, 11-Jun-07
                                                                                                                           DG401/403/405
                                                                                                                                Vishay Siliconix
APPLICATIONS


Peak Detector:
A3 acting as a comparator provides the logic drive for                             the analog input voltage. When ein goes below eout A3 goes
operating SW1. The output of A2 is fed back to A3 and                              negative, turning SW1 off. The system will therefore store the
compared to the analog input ein. If ein > eout the output of A3                   most positive analog input experienced.
is high keeping SW1 closed. This allows C1 to charge up to




                                                  Reset



                                                                       SW2


                                                                       SW1         R1
                                            –
                                             A1                                                         +
                           ein              +                                                            A2                   eout
                                                                                                        –
                                                                                              C1
                                            +                        DG401
                                             A3
                                            –




                                                                  Figure 12. Positive Peak Detector




Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see http://www.vishay.com/ppg?70049.



Document Number: 70049                                                                                                                      www.vishay.com
S-71155–Rev. H, 11-Jun-07                                                                                                                                11
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Document Number: 91000                                                                                      www.vishay.com
Revision: 08-Apr-05                                                                                                      1