CIRCUIT060088

Transimpedance amplifier (TIA) microphone amplifier circuit

CIRCUIT060088

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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

Get started

  1. Read the circuit design
  2. Download the model

Downloads

Design tool

Simulation for TIA Microphone Amplifier Circuit SBOC526.ZIP (550KB)

Supported products & hardware

Supported products & hardware

General-purpose op amps
OPA172 Single, 36-V, 10-MHz, low-power operational amplifier TLV6741 Single, 5.5-V, 10-MHz, low noise (4.6-nV/√Hz) operational amplifier
Precision op amps (Vos<1mV)
OPA192 High-Voltage, Rail-to-Rail Input/Output, 5µV, 0.2µV/˚C, Precision Operational Amplifier

Technical documentation

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Type Title Date
* Circuit design TIA microphone amplifier circuit 30 Dec 2018
User guide Single-Supply Electret Microphone Preamplifier Reference Design 02 Feb 2015

Related design resources

Design tools & simulation

SIMULATION TOOL
PSPICE-FOR-TI PSpice® for TI design and simulation tool TINA-TI SPICE-based analog simulation program
CALCULATION TOOL
ANALOG-ENGINEER-CALC Analog engineer's calculator

Reference designs

REFERENCE DESIGN
TIPD181 Single-Supply, Electret Microphone Preamplifier Reference Design

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