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Microphone coupon board based on the MP34DT01 digital MEMS microphone
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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.

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Data Brief

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


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1906: Microphone coupon board based on the MP34DT01 digital MEMS microphone
1.0 319 KB

Application Notes

Description Version Size
AN4146: STSmartVoice demonstration board STEVAL-MKI126Vx
2.0 3,511 KB
AN4184: Microphone coupon boards STEVAL-MKI129Vx based on the MP45DT02, MP34DB01, and MP34DT01
1.0 1,086 KB
AN4211: Guidelines for soldering MEMS microphones
1.1 644 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-MKI129V3 gerber files
528 KB

Schematic Pack

Description Version Size
STEVAL-MKI129V3 schematics
108 KB

Related Tools and Software

Related Tools and Software

Part Number Description
APWorkbench Audio Processor Workbench software development suite

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-MKI129V3ActiveMP34DT01-33Distributor reported inventory date: 2014-07-23
Distributor NameRegionStockMin. order

(*) 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 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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