Low-power MEMS microphone tolerates overload

January 08, 2021 // By Peter Clarke
Low-power MEMS microphone tolerates overload
The IM73A135 MEMS microphone from Infineon offers a 73dB signal-to-noise ratio and an acoustic overload point of 135dB sound pressure level.

The unit has power consumption of 170μA and comes in a package measuring 4mm by 3mm by 1.2mm. This makes the MEMS microphone competitive with electret condenser microphones (ECM) for some applications.

Infineon has also developed a digital ASIC to complement its MEMS microphone die. Current consumption in its low-power mode is as low 110µA making it a good fit with the wearables segment.

The IM73A135 MEMS microphone will be available for the distribution market in March 2021. The new MEMS microphone ASIC for wearables will be launched by 'Infineon-inside' partners in the next months.

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