WM7211E

WM7211E Top Port Digital Silicon Microphone DESCRIPTION The WM7211 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 WM7211 incorporates Cirrus’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7211 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 WM7211 incorporates a high performance ADC, which outputs a single-bit data stream using Pulse Density Modulation (PDM) encoding. The WM7211 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations. The WM7211 offers tight tolerance on the microphone sensitivity, giving reduced variation between parts. This removes the need for in-line production calibration of partto-part microphone variations. FEATURES  High SNR (61dB)  Low variation in sensitivity (±1dB tolerance)  Low current consumption - 2μA (Sleep) - 735μA (Normal operation)  PDM digital audio output  Stereo/array operation  Proprietary ADC technology - Reduced clock jitter sensitivity - Low noise floor - Stable in overload condition  Top Port LGA Package  1.64V to 3.7V supply APPLICATIONS  Mobile telephone...