Microphone coupon board based on the MP34DT01 digital MEMS microphone

The STEVAL-MKI129V3 is a daughterboard designed to be used in conjunction with the STEVAL-MKI126Vx (Smart Voice) kit, containing 4 MP34DT01 digital MEMS microphones.

The coupon concept allows easy performance test of ST MEMS microphones. When inserted in the Smart Voice board, it is possible to detach the single PCBs hosting each microphone.

Key Features

  • 4 x MP34DT01 top port digital MEMS microphones
  • Daughterboard to be used with STEVAL-MKI126Vx kit
  • Vsupply from 1.64 V to 3.6 V
  • 120 dBSPL acoustic overload point
  • Omnidirectional sensitivity
  • PDM single-bit output
  • 63 dB of SNR
  • Sensitivity -26 dBFS
  • RoHS compliant




Technical Documentation

Product Specifications
Description Version Size
DB1906 DB1906: Microphone coupon board based on the MP34DT01 digital MEMS microphone 1.0 318 KB
Application Notes
Description Version Size
AN4211 AN4211: Guidelines for soldering MEMS microphones 4.0 688 KB
AN4184 AN4184: Microphone coupon boards STEVAL-MKI129Vx /MKI155Vx based on digital microphones 2.0 1 MB
AN4146 AN4146: STSmartVoice demonstration board STEVAL-MKI126Vx 2.0 3 MB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-MKI129V3 gerber files 2.0 528 KB
Schematic Pack
Description Version Size
STEVAL-MKI129V3 schematics 1.0 108 KB


License Agreement
Description Version Size
Evaluation products license agreement 1.4 128 KB

Tools and Software

Development Tools
Software Development Tools
Support & Community

Sample & Buy

Part Number Marketing Status Unit Price (US$) * Quantity Core Product ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors

(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-MKI129V3 NRNDCARDIndustrialEcopack2

(**) 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.