I have a customer not using the audio ADC but is using the aux for volume... do they need the ref resistor or can they let all pins float?
Sorry for the late response. I think since the ADCs are current-input rather than voltage-input, you should be able to leave them floating with no adverse effects. I would also suggest muting and powering down the ADCs using the hardware control registers:
I am confirming with the design team to make sure this is OK.
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