Single-Supply, Electret Microphone Preamplifier Reference Design
TIPD181
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- Single-Supply Electret Microphone Preamplifier Reference Design
(PDF 960 KB)
02 Feb 2015
-
TIPD181 Design File
(ZIP 488 KB)
18 Feb 2015
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.
See the Important Notice and Disclaimer covering reference designs and other TI resources.