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STEVAL-MKI117V2

MEMS microphone demonstration board based on the MP45DT02 and STM32
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The purpose of the STEVAL-MKI117V2 demonstration board is to provide an example of the decoding and streaming of digital MEMS microphone outputs.

The STEVAL-MKI117V2 demonstration board hosts the MP45DT02 (top-port digital microphone), working as a sensor, and the STM32F107RC microcontroller, working as an audio decoder.

These microphones are analog-to-digital transducers, in other words, 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-MKI117V2 demonstration board is a sound card automatically recognized by the PC as an audio device. The connection is made through a USB cable which also supplies the board and then streams the collected audio.

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Data Brief

Key Features

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

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Design Resources

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Technical Documentation

Product Specifications

Description Version Size
pdf
DB1601: MEMS microphone demonstration board based on the MP45DT02 and STM32
1.0 348 KB

Application Notes

Description Version Size
pdf
AN4041: APWlink+ microphone USB demonstration boards based on the MP34DT01, MP45DT02, or MP34DB01
2.1 1,032 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
zip
STEVAL-MKI117V2 gerber files
1.0.0 544 KB

Bill of Materials

Description Version Size
pdf
STEVAL-MKI117V2 BOM
2.0.0 83 KB

Schematic Pack

Description Version Size
pdf
STEVAL-MKI117V2 schematics
1.0.0 68 KB

Related Tools and Software

Related Tools and Software

Part Number Description
APWorkbench Audio Processor Workbench software development suite

Sample & Buy

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Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-MKI117V2ActiveMP45DT02; STM32Buy Direct71.05Distributor reported inventory date: 2014-11-27
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA150
P&SOrder NowASIA/PACIFIC11
ANGLIA LiveOrder NowEUROPE41
Farnell Element14Order NowEUROPE111
MOUSEROrder NowWORLDWIDE181
Ecopack2-

(*) 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
(**) 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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