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IF sampling frequencies vs FPBW

On the first page of AD9265 datasheet, it mentions that "IF sampling frequencies to 300 MHz" and "Differential analog inputs with 650 MHz bandwidth”.  I think 650MHz is the 3dB full power BW, then we can input analog signal up to 650MHz. Right? How to understand "IF sampling frequencies to 300 MHz"? What's its meaning?

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  • FormerMember
Aug 21, 2019 +1 verified


Your understanding of the BW is correct and one could inject signals up to (and beyond) 650 MHz if the loss (3dB+) and performance degradation is considered acceptable for the application.  IF sampling…