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AD9467 SNR degradation for higher analog input frequency

Question asked by Vishnu on Mar 2, 2017
Latest reply on Mar 28, 2017 by UmeshJ

Hi,

 

My design requires AD9467 to handle IF at 70MHz as wells as 205MHz with the same clock frequency of 92MHz.

When evaluated at 72MHz the SNR was 75dB whereas it was 70dB for 205MHz analog input (at -1dBFS). The clock source and frequency is the same in both cases and I'm using bandpass filters of respective center frequencies.

One observation I've seen is that for -12dBFS, the 205MHz analog input is also giving 75dB SNR.

 

Regards,

Vishnu R.

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