WM7331 Datasheet, PDF (1/12 Pages) Cirrus Logic – Bottom Port Analog Silicon Microphone

WM7331E
Bottom Port Analog Silicon Microphone
DESCRIPTION
The WM7331 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 WM7331 incorporates Cirrus Logic^® proprietary
CMOS/MEMS membrane technology, offering high reliability
and high performance in a miniature, low-profile package.
The compact integration of transducer and internal circuitry
on a single die enables implementation within an extremely
small package size.
The WM7331 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 WM7331 offers 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 (63dB)
 Low variation in sensitivity (±1dB tolerance)
 Low current consumption (55µA)
 Analog output
 Bottom Port LGA Package
 2.5mm x 1.6mm x 0.9mm package
 1.6V to 3.6V supply
APPLICATIONS
 Mobile phone handsets
 Wearable devices
 Portable media players
 Digital cameras
BLOCK DIAGRAM
VDD
WM7331
3D VIEW
CHARGE
PUMP
CMOS MEMS Transducer
AMP
OUTPUT
2.50mm x 1.60mm x 0.90mm LGA package
GND
Pre-Production
http://www.cirrus.com
This document contains information for a product under
development. Cirrus Logic reserves the right to modify this
product.
Copyright  Cirrus Logic, Inc., 2014–2016
(All Rights Reserved)
Rev 3.2
APR ‘16