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PreAmplifier and Microphone

Other Parts Discussed in Thread: LMV1012, LMV1032, INA217

Hi there,

This is my first question on TI E2E. I am an electronics engineering student. 

I'm starting to work on audio preamp for a microphone.

This device will be placed in an open-field such as farms or jungles, to record an audio signal and perform some tasks.

Q1- I need a microphone that can sense far-field audio signals as well. How can I select it? Would mems audio microphone would be better option?

Q2- I need to build a preamp for this microphone, shall i build preamp with discrete components (transistor, opamps, etc) or get TI's preamp IC such as LMV1012? What TI preamp IC's would you suggest for this application? I would prefer Through-hole IC if possible.

Kindly answer asap, as I cannot start until i get some information. 


Zain Ireland

  • Hi Zain,

    Welcome to E2E and thank you for your interest in our products!

    The preamplifier selection could be based on your microphone specs. 2-wire, 3-wire, digital, etc.
    LMV1012 is 2-wire mic preamp and LMV1032 is 3-wire mic preamp, both available in DSBGA package.
    INA217 is a low noise, low distortion instrumentation amplifier and it's available in DIP-8 package.
    For digital microphones you must take a look at codecs or DAC's from AIC and DAC families.

    Best regards,
    Ivan Salazar
    Texas Instruments
  • Thanks Ivan,

    Yes I am trying to learn about digital microphones.