Connect microphones to ADAU1979

In the SC584-EZLite there are ADAU1977 & ADAU1979.

I would like to connect 8 microphones to the EZLite, 4 to each codec.

However, the ADAU1979 doesn'y have mic bias as ADAU1977.

How can I still use standard microphoens with the ADAU1979?

In other words, how do I bias micro[phones with the ADAU1979?

Thanks

Alon

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  • 0
    •  Analog Employees 
    on Jun 22, 2016 1:06 AM

    Hello Alon,

    The ADAU1979 does not have any PGA to amplify microphone level signals. That is why it does not have a MicBias output. So you will need to use an external pre-amp or a different ADC/Codec and bring in those signals onto the board.

    Dave T

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  • 0
    •  Analog Employees 
    on Jun 22, 2016 1:06 AM

    Hello Alon,

    The ADAU1979 does not have any PGA to amplify microphone level signals. That is why it does not have a MicBias output. So you will need to use an external pre-amp or a different ADC/Codec and bring in those signals onto the board.

    Dave T

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