Cirrus Logic, Inc. Bottom Port Digital Microphone WM7236

The WM7236 is a low-profile digital silicon microphone optimized for use with low power “always-on” voice control applications. The device incorporates Cirrus Logic’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7236 supports two operational modes selected according to the applied clock frequency. High performance mode offers wide dynamic range and class-leading THD performance. Low power mode offers low current consumption while maintaining excellent SNR performance. The WM7236 offers tight tolerance on the microphone sensitivity, giving reduced variation between parts and removing the need for in-line production calibration of part-to-part microphone variations. Features High SNR (63 dB) Low variation in sensitivity ±1 dB tolerance Low current consumption 10µA (Sleep) 300 µA (low power mode) 980 µA (high performance mode) PDM digital audio output Stereo/array operation Proprietary ADC technology Reduced clock-jitter sensitivity Low noise floor Stable in overload condition Bottom Port LGA Package 1.62V to 3.6V supply