WM7132 Datasheet, PDF (1/12 Pages) Wolfson Microelectronics plc – Bottom Port Analogue Silicon Microphone

WM7132PE
Bottom Port Analog Silicon Microphone
DESCRIPTION
The WM7132P is a low-profile silicon analog microphone. It
offers high Signal to Noise Ratio (SNR) and low power
consumption and is suited to a wide variety of consumer
applications.
The WM7132P incorporates Cirrus proprietary
CMOS/MEMS membrane technology, offering high reliability
and high performance in a miniature, low-profile package.
The WM7132P 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 WM7132P Bottom Port microphone offers matched
performance to the WM7121P Top Port microphone. The
matched characteristics enable highly accurate sound pick-
up in opposite directions, suitable for noise cancellation and
other DSP algorithms.
The WM7132P offers a tight 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 (±1dB tolerance)
 Matched pair with Top Port microphone WM7121P
- Matched sensitivity, roll-off, and phase response
 Low current consumption (190µA)
 Analog output
 Bottom 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
VDD
WM7132P
CHARGE
PUMP
3D VIEW
CMOS MEMS
Transducer
AMP
GND
OUTPUT
3.76mm x 3.00mm x 1.10mm LGA package
http://www.cirrus.com
Copyright  Cirrus Logic, Inc., 2014–2015
(All Rights Reserved)
Rev 4.0
MAR ‘15