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NPI Body

STMicroelectronics IMP23ABSU

Analog bottom port microphone with frequency response up to 80kHz for ultrasound analysis and predictive maintenance applications

The IMP23ABSU is a compact, low-power microphone built with a capacitive sensing element and an IC interface. The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process to produce audio sensors.

The IMP23ABSU has an acoustic overload point of 130 dBSPL with a typical 64 dB signal-to-noise ratio.

The sensitivity of the IMP23ABSU is -38 dBV ±1 dB @ 94 dBSPL, 1 kHz.

The IMP23ABSU is available in a package compliant with reflow soldering and is guaranteed to operate over an extended temperature range from -40 °C to +85 °C.

Key features

Single supply voltage operation 1.52 V - 3.6 V
Omnidirectional sensitivity
High signal-to-noise ratio
High acoustic overload point: 130 dBSPL typ.

Additional features

Single supply voltage operation 1.52 V - 3.6 V
Omnidirectional sensitivity
High signal-to-noise ratio
High acoustic overload point: 130 dBSPL typ.
Package compliant with reflow soldering
Enhanced RF immunity
Ultra-flat frequency response
Ultrasound bandwidth (up to 80 kHz)
Low latency
Ultra-low-power: 150 µA max.
ECOPACK, RoHS, and “Green” compliant

Applications

Condition monitoring of industrial equipment
Leak detection
Electrical arcing
Smart medical instruments
Wearable devices
Hearables
Smart speakers

Available tools

STEVAL-MIC007V1: Microphone coupon board based on the IMP23ABSU analog MEMS microphone

STEVAL-STWINKT1B:

STWIN SensorTile Wireless Industrial Node development kit and reference design for industrial IoT applications

The STWIN SensorTile wireless industrial node (STEVAL-STWINKT1B) is a development kit and reference design that simplifies prototyping and testing of advanced industrial IoT applications such as condition monitoring and predictive maintenance. The kit features a core system board with a range of embedded industrial-grade sensors and an ultra-low-power microcontroller for vibration analysis of 9-DoF motion sensing data across a wide range of vibration frequencies, including very high frequency audio and ultrasound spectra, and high precision local temperature and environmental monitoring.

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