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CODEC chip ADAU1372/ADAU1777/ADAU1702 background noise problem

Question asked by houliang on Nov 13, 2017
Latest reply on Nov 14, 2017 by DaveThib

The ADAU1372/ADAU1777/ADAU1702 codec serials chip, without download program, analog output background noise (DAC output noise) + ripple only about 4mV; but after download any program files, the output background noise + ripple raise upto 50mV. I use the official evaluation board for testing. Want to ask what is the reason? How to improve?