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Why are the filter parameters in the HMC7044 data sheet different from those in the EVAL-HMC7044 schematic ?

Hi,I find the PDF1 frequency and PFD2 frequency  in HMC7044 data sheet and EVAL-HMC7044 data sheet is the same value,why their filter is different?

  • Hi,

    It is not abnormal to set different loop filter components on the evaluation board than the ones used in characterization. I am not sure what was the reason to select this filter on the evaluation board, but you can simulate both of these in ADISIMCLK tool and select the one that suits your application. 

    Regards,

    Kudret