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LMK04826: Can LMK04826 generate 122.88MHz, 245.76MHz using 20MHz VCXO?

Daniel Chen
Prodigy 10 points
Part Number: LMK04826

If setting VCXO frequecny  122.88MHz and the VCO1 frequency  15099.494MHz， but the actual VCXO frequency is 20MHz, will the actual VCO1 frequency be 2457.6MHz? What's the potential risk it will be ?

  • +1
    TI__Expert 8111 points

    Daniel,

    From my understanding you require PLL2 to support a VCXO frequency of 20 MHz and need a VCO frequency that will be able to support 122.88MHz and 245.76 outputs.  If this is the case, yes it is possible and should work fine.  Here is an example:

    Regards,

    Will