STEVAL-STWINMA2 Analog Microphone Array

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            STEVAL-STWINMA2 Analog Microphone Array
                    STMicroelectronics' industrial analog microphone array is an expansion for the SensorTile Wireless Industrial Node (STWIN) kit
    

Image of STMicroelectronics STEVAL-STWINMA2 Analog Microphone Array STMicroelectronics' STEVAL-STWINMA2 microphone array expansion adds advanced audio sensing capabilities to the STEVAL-STWINKT1B (and STEVAL-STWINKT1) SensorTile Wireless Industrial Node (STWIN) kit for high-frequency vibration monitoring applications.

The board includes four low-power, high signal-to-noise ratio (SNR) IMP23ABSU capacitive sensing microphones, supported by a very low drop voltage, low quiescent current, and low noise voltage regulator, ideal for battery-powered systems such as the STWIN. The expansion board is connected to the core system board via a dedicated 12-pin connector.

The combination of STWIN and STEVAL-STWINMA2 is supported thanks to the software examples provided in the X-CUBE-MEMSMIC1 expansion software package for STM32Cube. The package includes examples of microphone data streaming via USB and ultrasound condition monitoring (UltrasoundFFT), which calculates the FFT of the analog microphone signal and streams the result to a PC GUI via USB. The microphone sampling rate is set by default to 192 kHz, while the microphone bandwidth is up to 80 kHz.

Features

Analog microphone array expansion for STEVAL-STWINKT1B (and STEVAL-STWINKT1)
Connects to the STWIN core system board through a dedicated 12-pin connector
3 V to 5.5 V power supply input
4 mm square-shaped differential microphone array
Four IMP23ABSU high-performance, single-ended, analog, bottom-port MEMS microphones

LDK130 300 mA low quiescent current very low noise LDO
Ultrasound frequency response up to 80 kHz
On-board audio-grade quad ADC
Serial audio interface (SAI) digital output