STMicroelectronics MP34DB02TR

Overview

MP34DB02TR from STMicroelectronics is an omnidirectional digital MEMS microphone with PDM output, designed for stereo audio capture in space-constrained portable devices. It features –26 dBFS sensitivity, 62.6 dB SNR, 120 dBSPL acoustic overload point, 1.8 V supply, and operates from –40 °C to +85 °C in a 3 × 4 × 1 mm RHLGA package.

For engineers reviewing the MP34DB02TR datasheet, MP34DB02TR pinout, MP34DB02TR application, or MP34DB02TR equivalent, this page delivers verified electrical specs, stereo channel selection logic, bottom-port mechanical integration guidance, EMI-shielded SMD packaging details, and real-world use cases in voice-enabled edge devices.

Technical Context

The MP34DB02TR integrates a silicon micromachined capacitive sensing element (supplied by Omron) with a CMOS interface IC that outputs a single-bit PDM stream synchronized to an external clock. Its L/R pin selects left- or right-channel data on DOUT, enabling true stereo configuration without additional controllers.

It operates at clock frequencies from 1 MHz to 3.25 MHz, achieves A-weighted SNR of 62.6 dB at 1 kHz/1 Pa, and maintains <1% THD+N at 100 dBSPL (50 Hz–4 kHz). Power consumption is 0.65 mA typical in active mode and 20 µA in power-down mode.

Key Specifications

Pinout & Package

The MP34DB02TR uses a 5-terminal RHLGA (3 × 4 × 1 mm) bottom-port, EMI-shielded, RoHS-compliant package with metal cap and 0.25 mm port hole. It is SMD-compatible and qualified per JEDEC J-STD-020 for lead-free reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital MEMS microphone applications.

Compared with SPH0641LU4H-1 and IM69D130, the MP34DB02TR offers optimal balance of size (3 × 4 mm), PDM stereo simplicity, and industrial-grade temperature range (–40 °C to +85 °C), making it preferred for cost-sensitive, space-constrained consumer electronics requiring robust dual-channel audio input.

Availability

MP34DB02TR is available at Aetrix Electronics and suitable for smartphone voice assistants, laptop far-field speech recognition, and VR/AR headset input requiring stable component supply across high-volume production cycles.

Supply support for MP34DB02TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and analog/mixed-signal products for automotive, industrial, and consumer markets.

The MP34DB02TR belongs to ST's MEMS audio sensor product line, engineered specifically for ultra-low-power, high-SNR digital voice capture in portable and wearable edge devices with stringent size and EMI constraints.

FAQ

What is the recommended power supply decoupling for MP34DB02TR?

ST specifies two ceramic capacitors placed adjacent to pin 3 (Vdd): a 100 nF capacitor for high-frequency noise suppression and a 10 µF capacitor for bulk energy storage. Both must be low-ESR types and located within 2 mm of the Vdd pin to ensure stable operation and minimize PDM jitter under dynamic load conditions.

How does the LR pin control stereo output on MP34DB02TR?

The LR pin selects which channel's PDM data appears on DOUT: when pulled to GND, DOUT carries left-channel data; when pulled to Vdd, DOUT carries right-channel data. The pin must be statically driven-no toggling during operation-and both states maintain high-impedance on the inactive channel's data path.

Can MP34DB02TR operate at 3.3 V supply?

Yes-the MP34DB02TR supports Vdd from 1.64 V to 3.6 V. At 3.3 V, current consumption remains within spec (≤0.65 mA), SNR holds at 62.6 dB, and clock tolerance expands slightly. No derating is required, and all AC specifications-including sensitivity and AOP-are guaranteed across the full voltage range.

Is the MP34DB02TR bottom-port opening centered under the package?

Yes-the acoustic port is a 0.25 mm diameter circular opening centered on the bottom surface, aligned with the die cavity. Mechanical drawings (Table 9, Figure 7) confirm symmetry: G1/G2 define lateral centering (3.100 mm typ), and T1/T2 specify vertical standoff (0.400 mm typ), ensuring consistent acoustic coupling through standard PCB vias or gaskets.