Hi,
We have a circuit where we use the codec in combination with a mems mic as seen below.
The Problem we have now is that the analog gain of the ADC input (page 1/reg 47) is showing a strange behavior we tested this on the evaluation module as well.
The picture below shows the gradual increase of the PGA register from 0 to 59,5dB.
And the steps zoomed in show a drop of 6dB when for example changing 17,5dB to 18dB. Those are all the same step changed multiple times to check for constant behavior.
Any ideas about this?
Rgds
Simon