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WM7121P Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM7121P Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 13 page  w WM7121P, WM7121PE Top Port Analogue Silicon Microphone WOLFSON MICROELECTRONICS plc Pre-Production, June 2014, Rev 3.0 Copyright 2014 Wolfson Microelectronics plc 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 |
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