Cirrus Logic, Inc. Bottom Port Analog Microphone WM7331

The WM7331 is a low-profile silicon analog microphone offering high Signal-to-Noise Ratio (SNR) and low power consumption. The device incorporates Cirrus Logic’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The compact integration of transducer and internal circuitry on a single die enables implementation with an extremely small package. The WM7331 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 (55µA) Analog output Bottom Port LGA package 2.5mm x 1.6mm x 0.9mm package size 1.6 to 3.6 V supply