WM7210 Datasheet, PDF (1/12 Pages) Wolfson Microelectronics plc – Top Port Digital Silicon Microphone

w
WM7210, WM7210E
Top Port Digital Silicon Microphone
DESCRIPTION
The WM7210 is a low-profile silicon digital microphone. It
offers high Signal to Noise Ratio (SNR) and low power
consumption and is suited to a wide variety of consumer
applications.
The WM7210 incorporates Wolfson’s proprietary
CMOS/MEMS membrane technology, offering high
reliability and high performance in a miniature, low-profile
package. The WM7210 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 WM7210 incorporates a high performance ADC,
which outputs a single-bit Pulse Density Modulated (PDM)
audio data stream. The WM7210 supports selectable
left/right channel assignment for a two-channel digital
microphone interface, enabling efficient connection of
multiple microphones in stereo/array configurations.
The WM7210E 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
- WM7210 – SNR 58dB, Sensitivity +/-3dB
- WM7210E – SNR 58dB, Sensitivity +/-1dB
 Low power
- Sleep mode - 2μA
- Normal operation - 650μA
 Low profile packaging
 Support for automated flow solder assembly
 PDM digital audio output
 Stereo/array operation
 Proprietary ADC technology
- Reduced clock jitter sensitivity
- Low noise floor modulation
- Stable in overload condition
 Top port package
 1.64V to 3.7V supply
 4.00 x 3.00 x 1.03mm thin package design
APPLICATIONS
 Mobile telephone handsets
 Portable computers
 Portable media players
 Digital still cameras
 Digital video cameras
 Bluetooth headsets
 Portable navigation devices
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews
Preliminary Technical Data, January 2012, Rev 2.2
Copyright 2012 Wolfson Microelectronics plc