MP34DT05TR-A

Microphones Overview

The MP34DT05TR-A is an ultra-compact, low-power, omnidirectional digital MEMS microphone manufactured by STMicroelectronics. It integrates a capacitive sensing element with a CMOS IC interface to deliver a PDM digital output. Key electrical parameters include a supply voltage range of 1.6 V to 3.6 V, a typical operating current of 650 µA, and a sensitivity of -26 dBFS ±3 dB at 94 dB SPL. The device features a signal-to-noise ratio of 64 dB and operates within a frequency range of 100 Hz to 10 kHz. It supports an acoustic overload point of 122.5 dBSPL and functions reliably across an extended temperature range from -40 °C to +85 °C.

Microphones Feature Summary

• Integrates a capacitive MEMS sensing element with a dedicated CMOS ASIC for direct digital PDM output, eliminating the need for external analog-to-digital conversion circuitry.
• Features an EMI-shielded HCLGA package with a top-port design, ensuring robust performance against electromagnetic interference in dense electronic environments.
• Provides high-fidelity audio capture with a 64 dB signal-to-noise ratio and consistent sensitivity, suitable for precise voice recognition and beamforming applications.

Microphones Applications

• Voice streaming over Bluetooth Low Energy (BLE) in smart wearable devices
• Multi-microphone arrays for AI-enabled speech processing and sound source localization
• IoT sensor nodes requiring compact audio input for smart home or industrial monitoring

Microphones Procurement Notes

Verify component authenticity through authorized distributors, as counterfeits may exist for obsolete parts. Confirm RoHS compliance status and check for specific ordering suffixes that denote tape-and-reel packaging variations. Ensure the supplier provides valid traceability documentation matching the STMicroelectronics manufacturing lot codes before finalizing acquisition.

Microphones Selection Notes

Select this component when a small form factor and digital integration are prioritized over analog flexibility. It is ideal for designs utilizing STM32 microcontrollers with SAI peripherals for efficient PDM data handling. Consider the 650 µA current consumption for battery-operated constraints and verify PCB layout compatibility with the HCLGA package dimensions.

Microphones Part Context

This part belongs to the MP34DT series of digital MEMS microphones, designed for high-performance audio applications. It serves as a successor to earlier analog variants, offering improved noise immunity through digital transmission. The MP34DT05-A variant specifically targets industrial and consumer electronics requiring reliable voice pickup in noisy environments.

Microphones Replacement Considerations

MP34DT05TR is the direct predecessor part number. Verify pinout and parameter compatibility if substituting, noting that the base model may have different availability status. No other cross-compatible models are officially confirmed in the provided documentation.