20MHz 5×7 TCXO Design


This complete TCXO example uses a 20MHz fundamental AT-Cut crystal and incorporates the internal Varicap as well as the internal oscillator regulator. It represents one of the simplest (and low cost) TCXO configurations that can be implemented with the TM100. One of the limitations of this configurations is the noise introduced by the internal Varicaps, however, for many applications, the noise is acceptable.


  • Low Cost
  • < 100ppb Frequency Stability
  • Low Phase Noise



PCB Files

Bill of Materials

IC Configuration

<Stability Plot>

<Phase Noise Plot>