MEMS audio sensor omnidirectional digital microphone

The MP34DB01 is an ultra-compact, low-power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface with stereo operation capability.

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 MP34DB01 has an acoustic overload point of 120 dBSPL with a best on the market 62.6 dB signal-to-noise ratio and -26 dBFS sensitivity.

The MP34DB01 is available in a bottom-port, SMD-compliant, EMI-shielded package and is guaranteed to operate over an extended temperature range from -40 °C to +85 °C.

Key Features

  • Single supply voltage
  • Low power consumption
  • 120 dBSPL acoustic overload point
  • 62.6 dB signal-to-noise ratio
  • Omnidirectional sensitivity
  • –26 dBFS sensitivity
  • PDM single-bit output with option for stereo configuration
  • RHLGA package
    • Bottom-port design
    • SMD-compliant
    • EMI-shielded
    • ECOPACK® , RoHS and “Green” compliant


Technical Documentation

Product Specifications
Description Version Size
DS6940 DS6940: MEMS audio sensor omnidirectional digital microphone 8.0 320 KB
Application Notes
Description Version Size
AN4041 AN4041: APWlink+ microphone USB demonstration boards based on the MP34DT01, MP45DT02, or MP34DB01 2.1 1 MB
AN4227 AN4227: Audio hub demonstration kit supporting the M45DT02, MP34DB01, and MP34DT01 microphones 1.0 1 MB
AN4428 AN4428: Best practices in the manufacturing process of MEMS microphones 1.1 1 MB
AN4427 AN4427: Gasket design for optimal acoustic performance in MEMS microphones 2.0 840 KB
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
AN4426 AN4426: Tutorial for MEMS microphones 2.0 947 KB

Presentations & Training Material

Description Version Size
Health and Wellness Mobility Cloud computing 1 MB

Publications and Collaterals

Description Version Size
APWorkbench software for audio ICs and MEMS microphones 1.0 2 MB
MEMS analog and digital microphones 989 KB
MEMS digital microphones 1.1 1 MB

Tools and Software

Evaluation Tools
Product Evaluation Tools
Support & Community

Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity 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**
MP34DB01TR NRNDRHLGA 4 3x4x1.0IndustrialEcopack3

(**) 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.