CY22150: external clock vs. crystal input in terms of jitter

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I've a simple question regarding CY22150, to which I wasn't able to find a solution in datasheets, forum nor knowledge-base.


In our design, we want to minimize the period jitter of CY22150's outputs to a minimum.  I've found that we have to raise VCO frequencies, but can you tell me if it is (in terms of jitter performance) better to use

  • an external, low-jitter clock as a reference
  • or a crystal input
  • or no difference between both options?

Are there other things or settings we have to take into account to minimize the output jitter?




Thanks a lot,


bye, Harald

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