描述 Description

The IM73D122V01 is an ultra-high performance digital PDM MEMS microphone designed for applications which

require a very high SNR (low self-noise) and high sensitivity and which is also IP57 robust to dust and water.

Best-in-class signal-to-noise ratio (SNR) of 73dB(A) enables far field and low volume audio pick-up. The flat

frequency response (20Hz low-frequency roll-off) and tight manufacturing tolerance improve performance of

multi-microphone (array) applications.

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 clock frequency and current consumption

requirements.

Each IM73D122V01 microphone is calibrated with an advanced Infineon calibration algorithm, resulting in low

sensitivity tolerances (± 1dB).

特性 Features

? Ultra high signal to noise ratio of 73dB(A) SNR

? Component level IP57 water and dust resistant

? Dynamic range of 101dB

? Acoustic overload point at 122dBSPL

? Digital PDM output

? Flat frequency response with a low frequency rolloff

at 20Hz

? Package dimensions: 4mm x 3mm x 1.2mm

? Omnidirectional pickup pattern

? Power optimized modes determined by PDM

clock frequency