Hello,
I have the same issue. I tried single ended and differential input (CM not routed) but in both cases, the ADC readings are around -80 (both gain and volume at 0 dB). It does not look like a noise, but more like a DC offset. It is amplified accordingly when the gain or/and the volume register values are increased. The offset stays even when the input pins are physically shortcut in order to eliminate external noise.
I really need 0x0000 output in a differential mode when no signal is present to the inputs.
Could you help, please? Thanks!
Konstantin