STAudioHub USB interface board based on MP45DT02 and STM32

The purpose of the STEVAL-MKI138V3 STAudioHub evaluation board is to demonstrate the decoding and streaming performance of digital MEMS microphone outputs.

The STEVAL-MKI138V3 hosts the MP45DT02 top-port digital microphone, which works as a sensor, and the STM32F107RC microcontroller, working as an audio decoder.

These microphones are analog-to-digital transducers. They are able to sense sound pressure and convert this signal into a digital signal using the PDM technique.

The STM32 microcontroller decodes the PDM signal coming from the microphones and streams the audio via the USB.

The STEVAL-MKI138V3 evaluation board is a sound card which is automatically recognized by a PC as an audio device. Connection is made through a USB cable, which also supplies the board, and then streams the audio collected from the microphones to the PC.

It is also possible to use the board as an interface for other microphone PCBs (STEVAL-MKI126Vx). In this case is recommended the use of the APWorkbench software tool.

Key Features

  • Sound card automatically recognized by a PC as an audio device.
  • MEMS microphones provide a high frequency data stream (1 to 3.25 MHz) of 1-bit digital samples (PDM technique)
  • Audio signals collected from the microphones are sent to the PC by USB (powered and connected to PC through USB)
  • LED status indicator
  • RoHS compliant

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设计

技术文档

产品规格
Description Version Size
DB2362 DB2362: STAudioHub USB interface board based on MP45DT02 and STM32 1.0 425 KB

硬件资源

Board Manufacturing Specifications
Description Version Size
STEVAL-MKI138V3 1.0 218 KB
Bill of Materials
Description Version Size
STEVAL-MKI138V3 BOM 1.0 83 KB
Schematic Packs
Description Version Size
STEVAL-MKI138V3 schematics 1.0 108 KB

法律

许可协议
Description Version Size
Evaluation products license agreement 1.0 125 KB
支持和社区

样片和购买

型号 Marketing Status Unit Price (US$) * Quantity Core Product ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-MKI138V3 Active 72 1 MP45DT02 NEC 3A991A2 ITALY MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

质量和可靠性

型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-MKI138V3 ActiveCARDIndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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