Digital Microphone Includes Fully Integrated 0.70 mm2 MEMS Device
Akustica, Inc. announced a new single-chip digital MEMS microphone for high-quality voice applications in laptops, tablets and netbook PCs. The AKU230 leverages Akustica’s patented monolithic CMOS MEMS platform, a technology which integrates the mechanical function of microphones and other sensors with analog and digital electronics—all in a single chip. As part of Bosch, Akustica has added in-house foundry capabilities. AKU230’s microphone die, which contains the microphone membrane, amplifier and sigma-delta converter, is 0.84 mm x 0.84 mm. This means the single-chip CMOS MEMS die is believed to be the smallest fully integrated MEMS device in the world. With a footprint of 3.76 mm x 4.72 mm, and 1.2 mm tall, the AKU230 is suited to thin form-factor integrations. The microphone features -26 dBFS +/-2 dB sensitivity, 56 dB typical SNR, -57 dBFS power supply rejection, highly-matched sensitivity control and stereo-microphone data multiplexing, suitable for dual microphone arrays that create directionality and noise suppression to enhance audio quality, and immunity to radio frequency and electromagnetic interference, further improving voice capture.