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Key Document
- Single-Supply Electret Microphone Preamplifier Reference Design
(PDF 960 KB)
02 Feb 2015 2,313 views
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TIPD181 Design File
(ZIP 488 KB)
18 Feb 2015 642 views
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.