Single-Supply, Electret Microphone Preamplifier Reference Design

(ACTIVE) TIPD181

Description & Features

Technical Documents

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Key Document

Description

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.

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Test Data

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Bill of Materials (BOM)

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA172  36-V, Single-Supply, 10-MHz, Rail-to-Rail Output, Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA172 Download
Download
Download

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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 960 02 Feb 2015 25
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 4555 08 Nov 2016 82
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 94 18 Feb 2015 0
PDF 104 18 Feb 2015 6
Related Tools & Software

Software (1)



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