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LMX2820: LMX2820EVM using PFDIN External Feedback Mode

porat yifrah
Prodigy 150 points
Part Number: LMX2820

HI

I'm using the LMX2820EVM in a feedback with 2 mixers configuration.

The RF output frequency from LMX is 4.3GHz and there is mixer with 4GHz LO to down convert 300MHz IF. (There is a low pass filter on the output of the mixer )

The 300MHz IF down convert again to 30MHz by LO 330MHz that generated from DAC

My question is if I must/can used in LTC6957-1 (buffer - squire wave LVPECL ) because the input of the PFDIN is very low frequency (30MHz) and the slow rate is long.

Thanks ,

Porat.