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WM7121 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM7121 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 12 page  w WM7121, WM7121E Top Port Analogue Silicon Microphone WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Preliminary Technical Data, October 2012, 2.0 Copyright 2012 Wolfson Microelectronics plc DESCRIPTION The WM7121 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 WM7121 incorporates Wolfson’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7121 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 WM7121E 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; selectable sensitivity tolerance options - WM7121 - SNR 65dB, Sensitivity +/-3dB - WM7121E - SNR 65dB, Sensitivity +/-1dB Matched performance to bottom port microphone WM7132 - Matched sensitivity performance - Matched frequency response - Matched phase response Low supply current 200µA 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 BLOCK DIAGRAM WM7121 Amp Transducer (CMOS MEMS) Charge Pump VDD OUTPUT GND GND |
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