R&D Stories: How Optical Technology Enables a Generational Shift in MEMS Microphone Performance

The article summarizes the evolution of MEMS microphone technology and describes the benefits of optical microphones over conventional solutions. This is a crucial reading to understand how the first generation of optical MEMS microphones have smashed the limits of SNR and dynamic range of miniature microphones, with 80dBA SNR (14dBA noise floor), 132dB dynamic range, 24-bit digital output and all with ultra-low power consumption.

CUI Devices' Audio Group announced the addition of two new digital I2S output models to its comprehensive line of MEMS microphones. The bottom port CMM-3526D-261-I2S-TR and top port CMM-4030D-261-I2S-TR are housed in extremely compact, low profile packages measuring 3.50 x 2.65 x 0.98 mm and 4.00 x 3.00 x 1.25 mm, respectively. Thanks to their digital I2S interface, these MEMS microphones eliminate the need for a codec, allowing for the microphones to connect directly to digital signal processors and microcontrollers in an end application.