WM7120A Datasheet, PDF (1/12 Pages) Wolfson Microelectronics plc – Top Port Analogue Silicon Microphone

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Top Port Analogue Silicon Microphone
DESCRIPTION
The WM7120A is a low-profile silicon analogue microphone.
It offers high Signal to Noise Ratio (SNR) and low power
consumption and is suited to a wide variety of consumer
applications.
The WM7120A incorporates Wolfson’s proprietary
CMOS/MEMS membrane technology, offering high reliability
and high performance in a miniature, low-profile package.
The WM7120A is designed to withstand the high
temperatures associated with automated flow solder
assembly processes. (Note that conventional microphones
can be damaged by this process.)
The WM7120AE variant offers a tighter tolerance on the
microphone sensitivity, giving reduced variation between
parts. This removes the need for in-line production
calibration of part-to-part microphone variations.
BLOCK DIAGRAM
FEATURES
 High SNR; selectable sensitivity tolerance options
- WM7120A - SNR 57dB, Sensitivity +/-3dB
- WM7120AE - SNR 57dB, Sensitivity +/-1dB
 Low supply current 140µA
 Low profile packaging
 Support for automated flow solder assembly
 Analogue output
 Top Port Package
 1.5V to 3.7V supply
 3.76mm x 2.95mm x 1.10mm Package
APPLICATIONS
 Mobile phone handsets
 Portable media players
 Digital still cameras
 Digital video cameras
 Bluetooth headsets
 Portable navigation devices
 Portable games consoles
WOLFSON MICROELECTRONICS plc
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Pre-Production, April 2012, Rev 3.1
Copyright 2012 Wolfson Microelectronics plc