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MEMS audio sensor omnidirectional stereo digital microphone
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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
11.0 878 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 based on the MP45DT02, MP34DB01, and MP34DT01
1.0 1,086 KB
AN4211: Guidelines for soldering MEMS microphones
1.1 644 KB
AN4227: Audio hub demonstration kit supporting the M45DT02, MP34DB01, and MP34DT01 microphones
1.0 1,572 KB

Related Tools and Software

Related Tools and Software

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

Publications and Collaterals


Description Version Size
MEMS analog and digital microphones
1,669 KB
MEMS digital microphones
1,915 KB


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**
MP34DT01ActiveHLGA4 4x3x1Tray_-No availability reported, please contact our Sales officeEcopack2PDF
MP34DT01TRActiveHLGA4 4x3x1Tape And Reel_Free SamplesDistributor reported inventory date: 2014-09-19
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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