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Long distance mic sensor signal transmission

murali kandasamy
Intellectual 350 points

HI,

I have differential analog MEMS microphone  signal which has to be transmitted over 100m. Is it better to convert it into current or is an amplified differential voltage enough?

Thanks & Regards
Murali

  • 0
    TI__Guru** 101465 points
    Hi Murali,

    This is not a questions for any specific device.
    As this is a differential signal the noise coupling wouldn't be such an issue in this case. It would also depend on input impedance of the receiving side of the signal, it is recommended that source has lower impedance than the receiver; if this could be a problem using a preamp to lower the mic impedance before connecting to the receiver could be an option.
    You could try to connect the mic signal as it is to your receiver, if there are problems with the signal then you can look for ways to solve it.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators