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Tunable Bandwidth: Analog or Digital?

Question asked by rodanu on Jul 3, 2017
Latest reply on Sep 8, 2017 by sripad

I'm evaluating the AD9364/1 chips for my application. My specific question is about the tuneable channel bandwidth, which the datasheets write is up to 56 MHz. I need to reduce thermal noise, which goes up with the analog bandwidth. Question: when I tune the chip to 10 MHz (for example), is it an analog filter before the AGC that limits the RF bandwidth, or a digital filter? Meaning, do I get reduced thermal noise due to the fact I limited the bandwidth?

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