Is it possible to connect a microphone to ADC of ADAU1401A?
Since there is not MICBIAS, etc. on ADAU1401A, so I believe that it is difficult
Do you know any solution to connect a microphone to ADAU1401A?
Best regards, TomY
You are correct that the power to the microphone would have to be supplied in another way since the 1401A does not have a micbias generator. The interesting thing about the 1401A is that the ADC is a current input ADC. So you can scale the full-scale voltage to make it more sensitive. If the microphone is able to drive the input impedance with enough level then you may be able to use it without an actual mic preamp. However, I feel that performance may suffer. The best way to know this is to obtain an evaluation board and a microphone that you would like to use and see if it is possible. See how it performs.
I do think the best method will be to have a preamp before the 1401A.
We have not tried to do this here in our labs. Perhaps someone else on the forum has attempted this? (Please respond if you have)
If this is a large project for a tier-1 customer then contact me directly to discuss.
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