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STMicroelectronics STEVAL-STWINMA2

Name: STEVAL-STWINMA2
Brand: STMicroelectronics
SKU: STEVAL-STWINMA2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STEVAL-STWINMA2

Manufacturer:: STMicroelectronics

Category:: Expansion Boards, Daughter Cards

Package:

Datasheet:: STEVAL-STWINMA2.pdf

Description:: EVAL BOARD FOR IMP23ABSU

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,986

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Product details

Overview

STEVAL-STWINMA2 from STMicroelectronics is an analog microphone array expansion board for the SensorTile Wireless Industrial Node (STWIN) platform, integrating four IMP23ABSU MEMS microphones, an ADAU1978 quad audio ADC, and LDK130 LDO to enable ultrasound-grade vibration monitoring up to 80 kHz with 192 kHz sampling. It connects via a dedicated 12-pin interface to STEVAL-STWINKT1B/STWINKT1 core boards for predictive maintenance in industrial IoT edge nodes.

For engineers reviewing the STEVAL-STWINMA2 datasheet, STEVAL-STWINMA2 pinout, STEVAL-STWINMA2 application, or STEVAL-STWINMA2 equivalent, key selection considerations include its 80 kHz analog bandwidth, SAI digital output interface, 3–5.5 V supply range, and integration with X-CUBE-MEMSMIC1 software for UltrasoundFFT and USB audio streaming.

Technical Context

The board implements a high-fidelity analog front-end: four bottom-port IMP23ABSU microphones (SNR = 64 dB, sensitivity = –38 dBV/Pa) feed into the ADAU1978 quad-channel sigma-delta ADC, which supports 24-bit resolution, programmable gain, and hardware-based decimation filtering. The LDK130M-R LDO delivers ultra-low-noise 3.3 V power (4 µV RMS noise, 300 mA output) to analog and digital domains.

Audio data is serialized via SAI (SAI_MCLK, SAI_SD, SAI_FS, SAI_SCK) to the host STM32 MCU; no I²C configuration is required for basic operation, as default register settings enable immediate 192 kHz stereo-pair streaming. The board's 4 mm square microphone layout enables coherent beamforming and spatial aliasing suppression up to 40 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
Microphone Count & Type	Four IMP23ABSU single-ended analog MEMS microphones, bottom-port, differential-capable layout
Analog Bandwidth	DC to 80 kHz - enables ultrasound condition monitoring for bearing fault detection
Sampling Rate	192 kHz default - supports Nyquist-limited analysis of signals up to 96 kHz
ADC Resolution	24-bit sigma-delta (ADAU1978) - provides >110 dB dynamic range for low-amplitude vibration signatures
Power Supply Range	3.0 V to 5.5 V - compatible with STWIN battery (3.7 V Li-ion) and USB-powered operation
LDO Output Noise	4 µV RMS (10 Hz–100 kHz) - preserves microphone SNR by minimizing analog supply-induced distortion
Digital Interface	SAI (I²S/PCM mode) - direct connection to STM32 SAI peripheral without level-shifting or protocol translation

Availability

STEVAL-STWINMA2 is available at Aetrix Electronics and suitable for predictive maintenance systems, industrial vibration analyzers, and ultrasound-based structural health monitoring requiring stable component supply, traceable sourcing, and long-term design-in support.

Supply support for STEVAL-STWINMA2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, sensors, power ICs, and analog/mixed-signal products for industrial, automotive, and IoT applications.

The STEVAL-STWINMA2 belongs to ST's SensorTile Wireless Industrial Node (STWIN) ecosystem, engineered specifically to extend edge AI sensing capabilities for industrial predictive maintenance with calibrated, production-ready analog microphone acquisition.

FAQ

Is STEVAL-STWINMA2 compatible with STEVAL-STWINKT1 (non-B version)?

Yes - the board is explicitly designed for both STEVAL-STWINKT1 and STEVAL-STWINKT1B core boards. Pin compatibility and firmware support (X-CUBE-MEMSMIC1 v1.1.0+) are validated across both variants, including identical 12-pin connector mapping and SAI signal routing.

What software examples are included for ultrasound analysis?

The X-CUBE-MEMSMIC1 package provides two validated examples: "UltrasoundFFT" computes real-time FFT on microphone data and streams magnitude spectra via USB to a PC GUI; "USB_Audio_Streaming" delivers raw 192 kHz PCM over USB Audio Class 2.0, enabling offline spectral analysis.

Does STEVAL-STWINMA2 require external clocking or configuration?

No - the ADAU1978 ADC operates from the host STM32's SAI_MCLK (default 12.288 MHz), and factory-default register settings enable immediate 192 kHz operation. No I²C initialization is needed unless custom gain, filter, or format changes are required.

Can the microphone array be used for beamforming or direction-of-arrival estimation?

Yes - the 4 mm square geometry and synchronized 192 kHz sampling across all four channels provide coherent time-domain data suitable for delay-and-sum beamforming and DOA algorithms. ST provides reference MATLAB scripts in X-CUBE-MEMSMIC1 for spatial spectrum analysis.

STEVAL-STWINMA2 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Active

Platform:: SensorTile

Type:: Audio

Function:: Microphone

Utilized IC / Part:: IMP23ABSU

Contents:: Board(s)

STEVAL-STWINMA2 FAQ

1.How can I place an order for STEVAL-STWINMA2 through Aetrix?

Please submit a Request for Quotation (RFQ) for STEVAL-STWINMA2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STEVAL-STWINMA2 reliable?

The price and inventory of STEVAL-STWINMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-STWINMA2 is usually 5 days.

3.What payment methods are accepted for STEVAL-STWINMA2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-STWINMA2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STEVAL-STWINMA2?

STEVAL-STWINMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STEVAL-STWINMA2 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STEVAL-STWINMA2?

For technical support, including STEVAL-STWINMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-STWINMA2 requirements.

6.How does Aetrix verify that STEVAL-STWINMA2 is sourced from the original manufacturer or authorized distributors?

All STEVAL-STWINMA2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STEVAL-STWINMA2 meets industry standards.

7.What is the process for return or replacement of STEVAL-STWINMA2?

All STEVAL-STWINMA2 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-STWINMA2, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STEVAL-STWINMA2 part is unused and in its original packaging.

Return procedure for STEVAL-STWINMA2:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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