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STAudioHub USB interface board based on MP45DT02 and STM32
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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.

pdf 下载
Data Brief

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


图案 资源


Technical Documentation

Product Specifications

描述 版本 大小
DB2362: STAudioHub USB interface board based on MP45DT02 and STM32
1.0 425 KB

Hardware Resources

Board Manufacturing Specification

描述 版本 大小
1.0 219 KB

Bill of Materials

描述 版本 大小
1.0 84 KB

Schematic Pack

描述 版本 大小
STEVAL-MKI138V3 schematics
1.0 108 KB

样品 & 购买

产品型号 Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-MKI138V3ActiveMP45DT02-72Distributor reported inventory date: 2016-02-06
Distributor NameRegionStockMin. order

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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