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Connection of Microphone with ADAU1977

Question asked by TomY on Nov 15, 2016
Latest reply on Nov 16, 2016 by TomY

Hello, ADI Support Team


I have a question about a connection of between Microphone and ADAU1977.

I can see a reference connection in Figure 21 of the datasheet.
And also, I find the following discription on Page 23 of the datasheet.
The diagnostics are provided only when MICBIAS is enabled and the microphone is connected as recommended in the appropriate application circuit (see Figure 21).


Question 1:

Must it follow the connection of Figure 21 for Diagnostic functions?
If it does not follow the Figure 21, doesn't Diagnostic function work?

Question 2:

If the diagnostic functions is not needed, is it OK as the following connection from the device viewpoint?
For some reason, I want to do reverse connection + and - between Mic and ADAU1977.


Best regards, TomY