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MEMS audio sensor omnidirectional stereo digital microphone
  • active Active

The MP34DT01 is an ultra-compact, low-power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface.

The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors.

The IC interface is manufactured using a CMOS process that allows designing a dedicated circuit able to provide a digital signal externally in PDM format.

The MP34DT01 has an acoustic overload point of 120 dBSPL with a 63 dB signal-to-noise ratio and –26 dBFS sensitivity.

The MP34DT01 is available in a top-port, SMD-compliant, EMI-shielded package and is guaranteed to operate over an extended temperature range from -40 °C to +85 °C.

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Errata Sheet
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Key Features

  • Single supply voltage
  • Low power consumption
  • 120 dBSPL acoustic overload point
  • 63 dB signal-to-noise ratio
  • Omnidirectional sensitivity
  • –26 dBFS sensitivity
  • PDM output
  • HCLGA package
  • Top-port design
  • SMD-compliant
  • EMI-shielded
  • ECOPACK®, RoHS, and “Green” compliant

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS8697: MEMS audio sensor omnidirectional digital microphone
12.0 637 KB

Application Notes

Description Version Size
AN4041: APWlink+ microphone USB demonstration boards based on the MP34DT01, MP45DT02, or MP34DB01
2.1 1,032 KB
AN4146: STSmartVoice demonstration board STEVAL-MKI126Vx
2.0 3,511 KB
AN4184: Microphone coupon boards STEVAL-MKI129Vx /MKI155Vx based on digital microphones
2.0 1,264 KB
AN4211: Guidelines for soldering MEMS microphones
4.0 688 KB
AN4227: Audio hub demonstration kit supporting the M45DT02, MP34DB01, and MP34DT01 microphones
1.0 1,572 KB

Presentations & Training Material


Description Version Size
Health and Wellness Mobility Cloud computing
1,347 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-MKI129V3 Microphone coupon board based on the MP34DT01 digital MEMS microphone
STEVAL-MKI126V3 STSmartVoice demonstration board based on MP34DT01
STEVAL-MKI117V1 MEMS microphone demonstration board based on the MP34DT01 and STM32
STEVAL-MKI155V3 Microphone coupon board based on the MP34DT01-M digital MEMS microphone
STEVAL-MKI138V1 STAudioHub USB interface board based on MP34DT01 and STM32

Publications and Collaterals


Description Version Size
Semiconductor solutions for healthcare applications
1.0 665 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
MP34DT01TRActiveHLGA4 4x3x1Tape And Reel_Free SamplesDistributor reported inventory date: 2015-11-25
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA400004000

(*) 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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