CIRCUIT060088

Transimpedance amplifier (TIA) microphone amplifier circuit

CIRCUIT060088

Overview

This circuit uses an op amp in a transimpedance amplifier configuration to convert the output current from an electret capsule microphone into an output voltage. The common mode voltage of this circuit is constant and set to mid–supply eliminating any input–stage cross over distortion.
Features
  • Input pressure (Max) = 1000 dB SPL(2Pa)
  • Output voltage (Max) = 1.228 Vrms
  • Supply:
    • Vcc = 5 V
    • Vee = 0 V
  • Frequency response deviation @ 20Hz = -0.5 dB
  • Frequency response deviation @ 20kHz = -0.1 dB
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Technical documentation

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Type Title Date
Circuit design TIA microphone amplifier circuit (Rev. A) PDF | HTML Sep 26, 2024
User guide Single-Supply Electret Microphone Preamplifier Reference Design Feb 2, 2015

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