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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.
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The diagnostics are provided only when MICBIAS is enabled and the microphone is connected as recommended in the appropriate application circuit (see Figure 21).
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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

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