TIPD181

Single-Supply, Electret Microphone Preamplifier Reference Design

TIPD181

Design files

Overview

This TI Precision design details the design process for a preamplifier to be used with electret microphone capsules. It explains the basic construction and operation of an electret microphone and uses an OPA172 to amplify the output of the microphone to common analog line level voltages.

Features
  • TI Precision Designs: Verified Design
  • Designed for a single 9V battery power supply
  • ~2mA supply current
  • 68dB SNR with Microphone
  • This design is tested and includes theory, component selection, TINA-TI simulation, PCB schematic & layout, bill of materials, and measured results.

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDC916.ZIP (488 K)

Detailed schematic diagram for design layout and components

TIDRCZ8.PDF (104 K)

Detailed schematic diagram for design layout and components

TIDRCZ9.PDF (94 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

Products

Includes TI products in the design and potential alternatives.

General-purpose op amps

OPA172Single, 36-V, 10-MHz, low-power operational amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* User guide Single-Supply Electret Microphone Preamplifier Reference Design Feb. 02, 2015

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