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DAC34SH84: Help with DAC34SH84 Configuration – Understanding Interpolation, VCO/NCO Frequencies

Part Number: DAC34SH84
Other Parts Discussed in Thread: ADC3444

Tool/software:

Hello,

I am using the DAC34SH84 in my current project, and I have a few questions regarding its configuration.

My input data rate is 125 MSPS, and I am referring to the calculations shown in the datasheet (PAGE 54), but I am having trouble understanding how the interpolation factor, VCO frequency, and NCO frequency should be selected for my use case.

In my design, I am receiving digital data from the ADC3444 and transmitting it through the DAC34SH84. My goal is to ensure that the input to the ADC and the output of the DAC match in terms of data content and frequency.

Could you please help me understand:

  1. What interpolation value I should choose for a 125 MSPS input rate?

  2. What the VCO and NCO frequencies would be in this setup?

  3. How to configure the DAC so that the output correctly corresponds to the ADC input?

  4. What is the frequency of the FOSTR.
  5. What is the value of N ,M and P.

Any guidance or example settings would be greatly appreciated.