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WM7230IMS/V Scheda tecnica(PDF) 1 Page - Wolfson Microelectronics plc |
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WM7230IMS/V Scheda tecnica(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 12 page  w WM7230, WM7230E Bottom Port Digital Silicon Microphone WOLFSON MICROELECTRONICS plc Preliminary Technical Data, October 2012, Rev 2.4 Copyright ©2012 Wolfson Microelectronics plc DESCRIPTION The WM7230 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 WM7230 incorporates Wolfson’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7230 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 WM7230 incorporates a high performance ADC, which outputs a single-bit Pulse Density Modulated (PDM) audio data stream. The WM7230 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations. The WM7230E 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 - WM7230 – SNR 61dB, Sensitivity +/-3dB - WM7230E – SNR 61dB, Sensitivity +/-1dB • Low power - Sleep Mode - 2μA - Normal Operation - 700μA • 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 • Bottom Port Package • 1.64V to 3.7V supply • 4.00 mm x 3.00 mm x 1.00mm Thin Package Design APPLICATIONS • Mobile telephone handsets • Portable computers • Portable media players • Digital still cameras • Digital video cameras • Bluetooth headsets • Portable navigation devices BLOCK DIAGRAM WM7230 AMP Transducer (CMOS MEMS) VDD DAT CHARGE PUMP GND ADC CONTROL CLK LRSEL |
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