MEMS microphones ideal for high-quality acoustic recordings and far-field voice capturing

Infineon IM69D120 and IM69D130 XENSIV MEMS microphones, available now from Mouser, are designed for applications requiring low self-noise (high SNR), low distortions, wide dynamic range and a high acoustic overload point. The microphones have a 70dB SNR. The microphones featuring Dual Backplate MEMS technology, are based on a miniaturised symmetrical microphone design, as employed in studio condenser microphones. This results in high linearity of the output signal within a dynamic range of 95dB for the IM69D120 and 105dB for the IM69D130. This is coupled with a particularly low distortion level of 10% at a SPL of 135dB. The microphone distortion does not exceed 1%, even at sound pressure levels of 128dBSPL. The flat frequency response (28Hz low-frequency roll-off) and tight manufacturing tolerance result in close phase matching of the microphones, which is important for multi-microphone (array) applications. The microphones are housed in 4mm x 3mm x 1.2mm MEMS packages and are suited for high-quality acoustic recordings and far-field voice capturing applications.