The SiS3922 is a Top Port digital MEMS microphone designed in a SMD compliant package of 4.00mm x 3.00mm x 1.05mm. Composed of a reliable and high performance MEMS acoustic sensor, and an ASIC with analog-to-digital converter and PDM modulator integrated, it offers great acoustic performance with 61dB Signal-to-noise ratio (SNR), a flat wideband frequency response, and -26dBFS sensitivity.

The digital output interface supports the pulse density modulated (PDM) output for two digital MEMS microphone to be time-multiplexed on a shared bus of single data line using a single clock. In addition, SiS3922 operates from 1.65v to 3.6v and consumes power less than 880uA.