WM7216E

WM7216E Low Power Top Port Digital Silicon Microphone DESCRIPTION The WM7216 is a low-profile digital silicon microphone, optimised for use with low-power ‘Always-on’ voice control applications, such as Cirrus Logic® SoundClear™ software. The WM7216 supports two operational modes, selected according to the applied clock frequency. ‘Voice’ mode provides low current consumption, and sufficient SNR performance for speech recognition algorithms. ‘Hi-Fi Record’ mode offers wide dynamic range, and classleading THD performance. Operation in the ultrasonic band is also supported at high clock frequencies. The WM7216 incorporates Cirrus Logic proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7216 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 WM7216 incorporates a high-performance ADC, which outputs a single-bit data stream using Pulse Density Modulation (PDM) encoding. The WM7216 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations. The WM7216 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  Hig...