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Silicon MEMS VCXO Surpasses Quartz

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					Silicon MEMS VCXO Surpasses Quartz

Quartz has been the predominant technology of choice for timing references. Quartz oscillators consist of piezoelectric crystals with
analog circuits in ceramic packages. They provide accurate and stable clocks that meet the requirements of most electronic
applications. However, they have many inherent limitations, such as:

         Long lead times and lack of easy availability, due to complex manufacturing
         Lack of customization due to inflexibility
         Quality and performance variations over different lots and over different manufacturers
         Lack of integration

As semiconductors have grown in popularity, electronics manufacturers have turned to Silicon MEMS Timing solutions for their clocking
needs. Silicon MEMS Timing solutions provide the following benefits:

         Better availability and short lead times through semiconductor manufacturing infrastructure
         Easy customization due to programmability
         Consistently high quality and reliability
         Significant integration
         High performance, particularly for high speed serial interfaces and programmable logic (FPGAs).

In the case of VCXOs (Voltage Controlled Oscillators), the benefits of MEMS solutions become even more evident. Below is a
comparison of Quartz based VCXOs vs. Silicon MEMS VCXOs, which shows that MEMS is clearly superior to Quartz.


                                                Quartz VCXO                                          MEMS VCXO

         Core Technology                        Pullable Crystals                                   All-Silicon MEMS

  RMS Integrated Phase Jitter                        < 1ps                                               < 1ps
         (12kHz – 20MHz)

        Frequency Offering                10-15 standard frequencies                        Any frequency up to 220 MHz
                                                  (< 60 MHz)

            Pull Range                  ±50PPM, ±100PPM, ±200PPM                 ±25PPM, ±50PPM, ±100PPM, ±150PPM, ±200PPM,
                                                                                        ±400PPM, ±800PPM, ±1600 PPM

        Pull Range Linearity                          10%                                                < 1%

 Tuning Slope (Kv) Consistency                        Poor                                             Excellent

 Drive Strength for Impedance                    Not Available                                       Configurable
   Matching, EMI Reduction

         Product Coverage             Limited options for 1.8V, pull range       Any combination of voltage, pull range and package
                                               or 3225 package

            Lead Time                   8-12 weeks for standard device                           Samples in 48 hours
                                       16 weeks for non-standard device                        Production in 3-5 weeks



Learn more about :- Clock Generator , Differential Oscillator , MEMS Oscillator , TCXO

				
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Description: As semiconductors have grown in popularity, electronics manufacturers have turned to Silicon MEMS Timing solutions for their clocking needs. Silicon MEMS Timing solutions provide easy customization due to programmability,consistently high quality and reliability & significant integration compared to Quarts that have many inherent limitations