MP34DT01/MP34DT05 PDM MEMS Microphone Module

Name: MP34DT01/MP34DT05 PDM MEMS Microphone Module
Brand: STMicroelectronics
SKU: SENS-3123
Price: 489.00 INR
Availability: OutOfStock

₹489.00 (Inclusive of all taxes)

Out of Stock

The MP34DT01/MP34DT05 PDM MEMS Microphone Module is a digital audio sensor providing a direct PDM output for easy integration with microcontrollers like STM32, ESP32, and Raspberry Pi Pico. It operates from 1.8V to 3.3V, making it suitable for low-power IoT and embedded audio applications.

Features

Digital PDM output simplifies interfacing with MCUs and DSPs.
High 61 dB SNR ensures clear audio capture in noisy environments.
Low power consumption of 0.6 mA extends battery life in portable devices.
Wide 1.8V to 3.3V operating voltage range supports 3.3V and 1.8V logic systems.
Compact MEMS design with gold-plated pins for reliable, space-efficient integration.

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Description

The MP34DT01/MP34DT05 module integrates a high-performance MEMS acoustic sensor with a PDM (Pulse Density Modulation) digital interface. This architecture eliminates the need for an external analog-to-digital converter, providing a clean, clock-synchronized digital audio stream directly to the host processor. The module is engineered for stable operation across its specified voltage and clock frequency range.

Constructed with a robust MEMS element and precision-molded housing, the module offers consistent acoustic performance and resistance to environmental factors like temperature drift and mechanical shock. Its digital output is immune to noise pickup in mixed-signal PCB layouts, making it ideal for compact, noise-sensitive designs in consumer electronics and industrial monitoring systems.

Key Features

Digital PDM interface for direct connection to microcontrollers and digital audio processors.
High signal-to-noise ratio (61 dB) delivers clear audio quality for voice recognition and recording.
Optimized low-current design (0.6 mA typical) for battery-powered and always-on applications.
Broad operating voltage (1.8V to 3.3V) ensures compatibility with modern low-voltage logic families.
Supports a clock frequency range from 1 MHz to 3.25 MHz for flexible system timing.
Compact footprint (10mm x 12mm) and lightweight construction for space-constrained designs.
Gold-plated pin headers ensure reliable electrical contact and corrosion resistance.
MEMS-based sensing element provides high durability and stable performance over time.

Applications

Voice user interfaces and wake-word detection in smart home devices.
Audio recording and ambient sound monitoring for IoT sensor nodes.
Noise level analysis and acoustic event detection in industrial environments.
Biometric voice authentication and secure communication systems.
Wearable electronics requiring compact, low-power audio input.

Technical Specifications

Manufacturer Part Number	MP34DT01 / MP34DT05
Output Type	Digital PDM
Operating Voltage	1.8 V to 3.3 V DC
Current Consumption	0.6 mA (Typical)
Sensitivity	-26 dBFS
Signal-to-Noise Ratio (SNR)	61 dB
Clock Frequency Range	1 MHz to 3.25 MHz
Module Dimensions (L x W)	12 mm x 10 mm
Module Weight	2 g

Frequently Asked Questions

What is the difference between the MP34DT01 and MP34DT05 models on this module?

The MP34DT01 and MP34DT05 are functionally identical in terms of electrical interface, PDM output, and core specifications like SNR and sensitivity. The primary difference is in the acoustic port design and directionality, which may affect frequency response. This module is compatible with either variant, and the specific IC mounted will be indicated on the component.

How do I interface this PDM microphone with an Arduino or Raspberry Pi?

This module outputs a digital PDM signal, not a simple analog voltage. To interface with an Arduino (which lacks a native PDM decoder), you will need an external PDM-to-PCM converter IC or a microcontroller with a PDM interface, such as certain STM32 or nRF52 series chips. The Raspberry Pi Pico (RP2040) has a PIO-based PDM library that can be used for decoding.

What is the required clock signal for the PDM interface?

The module requires an external clock signal (CLK) within the range of 1 MHz to 3.25 MHz. The data (DAT) pin outputs the PDM stream synchronized to this clock. The clock frequency directly determines the output sample rate; a typical configuration uses a 2.4 MHz clock to achieve a 48 kHz audio sample rate after decimation filtering.

Can this microphone module be used for professional audio recording?

While it offers good clarity with a 61 dB SNR, its primary design is for voice capture in embedded systems like smart assistants and teleconferencing. For professional high-fidelity recording, microphones with higher SNR (>65 dB), lower distortion, and a wider dynamic range are recommended. This module is excellent for its intended use-case in compact, digital-first designs.