ST MP34DT01 MEMS audio sensor omnidirectional digital microphone User Guide & Data Sheet
Summary
This ultra-compact, low-power digital MEMS microphone offers omnidirectional audio sensing with a stable PDM output suitable for demanding applications. Designed for seamless integration into mobile electronics, laptops, and specialized A/V devices, it guarantees superior performance (120 dBSPL overload point) across a wide temperature range. This datasheet provides comprehensive technical specifications, operational parameters, circuit requirements, and mechanical details necessary for system designers building voice recognition, VoIP, e-learning, or anti-theft solutions.
Page 1 Text Content
MP34DT01
MEMS audio sensor omnidirectional digital microphone
Datasheet − production data
Features Single supply voltage Low power consumption 120 d BSPL acoustic overload point 63 d B signal-to-noise ratio Omnidirectional sensitivity –26 d BFS sensitivity
HCLGA 3x4x1 4LD
PDM output HCLGA package
Top-port design Description
SMD-compliant
The MP34DT01 is an ultra-compact, low-power,
EMI-shielded omnidirectional, digital MEMS microphone built ECOPACK®, Ro HS, and “Green” compliant with a capacitive sensing element and an IC
interface.
Applications The sensing element, capable of detecting
acoustic waves, is manufactured using a
Mobile terminals
specialized silicon micromachining process
Laptop and notebook computers dedicated to produce audio sensors. Portable media players
The IC interface is manufactured using a CMOS Vo IP process that allows designing a dedicated circuit able to provide a digital signal externally in PDM
Speech recognition
format.
A/V e Learning devices
The MP34DT01 has an acoustic overload point of
Gaming and virtual reality input devices
120 d BSPL with a 63 d B signal-to-noise ratio and
Digital still and video cameras –26 d BFS sensitivity. Antitheft systems
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.
Table 1. Device summary Part number Temperature range [°C] Package Packing
MP34DT01 -40 to +85 HCLGA (3 x 4 x 1) mm 4LD Tray MP34DT01TR -40 to +85 HCLGA (3 x 4 x 1) mm 4LD Tape and reel
July 2012 Doc ID 022331 Rev 9 1/16 This is information on a product in full production. www.st.com
Page Summary Contents For ST MP34DT01 MEMS audio sensor omnidirectional digital microphone User Guide & Data Sheet
Manual Details
| Brand | Audio |
|---|---|
| Pages | 16 |
| File Size | 318.03 KB |
| Published | May 15, 2026 |
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Frequently Asked Questions
What is the acoustic overload point and signal-to-noise ratio?
It offers an acoustic overload point of 120 dBSPL and a 63 dB signal-to-noise ratio.
Is this microphone suitable for automated electronic assembly?
Yes, it is SMD-compliant, features a top-port design, and comes in an EMI-shielded package.
What temperature range can the MP34DT01 operate within?
It is guaranteed to operate over an extended temperature range from -40°C to +85°C.
What type of digital signal output does the device provide?
The device provides a dedicated digital signal externally in PDM format, suitable for speech recognition.