Transimpedance amplifier (TIA) microphone amplifier circuit



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.
  • 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
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
Download View video with transcript Video

Get started

  1. Read the circuit design
  2. Download the model

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Circuit design TIA microphone amplifier circuit PDF | HTML 30 Dec 2018
User guide Single-Supply Electret Microphone Preamplifier Reference Design 02 Feb 2015

Related design resources

Design tools & simulation

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

Reference designs

TIPD181 Single-Supply, Electret Microphone Preamplifier Reference Design

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support.