WM7121P Datasheet, PDF (1/13 Pages) Wolfson Microelectronics plc – Top Port Analogue Silicon Microphone

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Top Port Analogue Silicon Microphone
DESCRIPTION
The WM7121P 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 WM7121P incorporates Wolfson’s proprietary
CMOS/MEMS membrane technology, offering high reliability
and high performance in a miniature, low-profile package.
The WM7121P 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 WM7121P Top Port microphone offers matched
performance to the WM7132P Bottom Port microphone. The
matched characteristics enable highly accurate sound pick-
up in opposite directions, suitable for noise cancellation and
other DSP algorithms.
The WM7121PE 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.
FEATURES
 High SNR (65dB)
 Low variation in sensitivity
- ±3dB tolerance (WM7121P)
- ±1dB tolerance (WM7121PE)
 Matched pair with Bottom Port microphone WM7132P
- Matched sensitivity, roll-off, and phase response
 Low current consumption (190µA)
 Analogue output
 Top Port LGA Package
 1.5V to 3.7V supply
APPLICATIONS
 Mobile phone handsets
 Portable media players
 Digital still cameras
 Digital video cameras
 Bluetooth headsets
 Portable navigation devices
 Portable games consoles
BLOCK DIAGRAM
3D VIEW
3.76mm x 2.95mm x 1.10mm LGA package
WOLFSON MICROELECTRONICS plc
Pre-Production, June 2014, Rev 3.0
Copyright 2014 Wolfson Microelectronics plc