ADC3544: SYNC Frequency and Phase

Part Number: ADC3544

Tool/software:

Hello, I wanted to confirm if to synchronize multiple ADC3544s the sync signal has to have a specific frequency/phase. That is to say, does the sync frequency have to match the input clock frequency, be a multiple of it, or be phase locked to the external input clock signal? And is there a maximum/minimum frequency for the sync signal?

I am attempting to synchronize multiple devices using the ADC3544 with a GPS pps signal, or derived GPS disciplined clock to feed into the ADC sync lines. Thank you!

  • Hi Felipe,

    The sync pin is used for sync'ing when using the NCO and DDC inside the ADC. See section 8.3.4.5 SYNC.

    Otherwise, to sync multiple devices, you can edge align the DCLK & FCLK Outputs from one device vs. another, etc.

    Regards,

    Rob