IM69D120 TM High performance digital XENSIV MEMS microphone Description The IM69D120 is designed for applications where low self-noise (high SNR), wide dynamic range, low distortions and a high acoustic overload point is required. Infineon s Dual Backplate MEMS technology is based on a miniaturized symmetrical microphone design, similar as utilized in studio condenser microphones, and results in high linearity of the output signal within a dynamic range of 95dB. The microphone distortion does not exceed 1% even at sound pressure levels of 118dBSPL. 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. With its low equivalent noise floor of 25dBSPL (SNR 69dB(A)) the microphone is no longer the limiting factor in the audio signal chain and enables higher performance of voice recognition algorithms. The digital microphone ASIC contains an extremely low-noise preamplifier and a high-performance sigma-delta ADC. Different power modes can be selected in order to suit specific current consumption requirements. Each IM69D120 microphone is calibrated with an advanced Infineon calibration algorithm, resulting in small sensitivity tolerances ( 1dB). The phase response is tightly matched ( 2) between microphones, in order to support beamforming applications. Features Dynamic range of 95dB Very fast analog to digital conversion speed (6s latency 1kHz - Signal to noise ratio of 69dB(A) SNR Power optimized modes determined by PDM - <1% total harmonic distortions up to clock frequency 118dBSPL Package dimensions: 4mm x 3mm x 1.2mm - Acoustic overload point at 120dBSPL PDM output Sensitivity ( 1dB) and phase ( 2 1kHz) matched Omnidirectional pickup pattern Flat frequency response with low frequency roll off at 28Hz Typical applications Devices with Voice User Interface (VUI) High quality audio capturing - Smart speakers - Conference systems - Home automation - Cameras and camcorders - IOT devices Industrial or home monitoring with audio pattern detection Active Noise Cancellation (ANC) headphones and earphones Datasheet Please read the Important Notice and Warnings at the end of this document 1.0 www.infineon.com 2017-12-20IM69D120 TM High performance digital XENSIV MEMS microphone Use cases Use cases Below 1% total harmonic distortion Sensitivity and phase matching - Voice command during music from the loud - Full utilization of voice algorithms capability speaker - Audio beam forming - Effective active noise cancellation even close - High and precise attenuation of background to loud noise source noise - Recordings in a discotheque or at a rock Power optimized modes concert - Low current consumption for always on High Signal to noise ratio applications - Far field audio signal pick-up - Long operating time of battery powered - Low volume audio and whispered voice devices capturing - Microphone noise is no longer limiting the audio chain Block diagram GROUND VDD MEMS BIAS VOLTAGE REGULATORS CHARGE PUMP DATA BACKPLATE 1 1-BIT DIGITAL SIGNAL MEMBRANE ADC PDM AMP SELECT PROCESSING BACKPLATE 2 INTERFACE CLOCK MEMS POWER DIGITAL CORE MODE DETECTOR CALIBRATION COEFFICIENTS ASIC Figure 1 IM69D120 block diagram Product validation Technology qualified for industrial applications. Ready for validation in industrial applications according to the relevant tests of IEC 60747 and 60749 or alternatively JEDEC47/20/22. Datasheet 2 1.0 2017-12-20