The IM69D130 MEMS microphone 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 105 dB. The
microphone distortion does not exceed 1% even at sound pressure levels of
128 dBSPL. The flat frequency response ( 28 Hz 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 25 dBSPL (SNR 69 dB(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.
Introduction
Each IM69D130 microphone is calibrated with an advanced
Infineon calibration algorithm, resulting in small sensitivity
tolerances (±1 dB). The phase response is tightly matched
(±2°) between microphones, in order to support
beamforming applications.
Link to Datasheet and Product Page
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2018-07-17 Copyright © Infineon Technologies AG 2018. All rights reserved.
