I'm trying to add a 1 pole RC filter with a 20kHz cutoff upstream of the LTC6363 as an anti-alias filter. My configuration is like this:
This is for audio frequency input signals and I'll be doing a 16x or 32x decimation factor to provide additional anti-alias performance.
According to LTSPICE I can add a 30nF capacitor as shown:
...and this gives me the magnitude response I'm after, but it adds a ton of noise @ 380kHz which I assume will alias into my input signal. If there's a more optimal solution please advise!