The issue happened when my customer injected high level input at frequency> 10KHz (9KHz to 11KHz) through ADAU1452 EVAL board. May i know what is the root cause?
Set up steps are attached. Kindly please help to advise.
I am not able to reproduce the issue on our board -- for example, here is the "worst case" signal, 10kHz -3dBFS through the EVAL-ADAU1452MINIZ:
As you can see, there is a much lower noise floor and no sideband distortion. Could you provide us with more information on the test conditions and signal path from your measurements? Are you going in and coming out using I2S? Also, could you please attach the SigmaStudio file used to get your results, so I can check to see if there may be any configuration irregularities?
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