MP34DT04TR-C1

Microphones Overview

The MP34DT04TR-C1 is an omnidirectional digital MEMS microphone manufactured by STMicroelectronics. It utilizes a silicon capacitive sensing element and CMOS interface to deliver PDM audio data. The device operates on a single supply voltage ranging from 1.6 V to 3.6 V with a typical supply current of 700 µA. It features a sensitivity of -26 dB ±3 dB at 94 dB SPL and a signal-to-noise ratio of 64 dB. The frequency response spans 100 Hz to 10 kHz, housed in a compact 4.00mm x 3.00mm rectangular package.

Microphones Feature Summary

• Omnidirectional acoustic sensitivity for uniform sound capture
• Digital PDM output interface eliminating analog noise susceptibility
• Ultra-compact surface-mount design suitable for space-constrained electronics

Microphones Applications

• Voice streaming over Bluetooth Low Energy (BLE) modules
• IoT sensor nodes requiring low-power audio acquisition
• Smart home devices and voice-controlled assistants

Microphones Procurement Notes

Verify the specific suffix designation carefully during procurement. Datasheets indicate that the base part number MP34DT04 may have variants such as MP34DT04-C1 or MP34DT05-A. Confirm that the ordered component matches the exact electrical and mechanical specifications required for the design, as suffixes can denote packaging or minor parameter differences.

Microphones Selection Notes

Select this component when a digital PDM interface is preferred over analog outputs to simplify PCB layout and reduce electromagnetic interference. Ensure the host microcontroller supports PDM clocking and data decoding. Verify that the operating voltage range aligns with the system's power rails and that the acoustic requirements meet the 64 dB SNR specification.

Microphones Part Context

This microphone belongs to the MP34 series of digital MEMS sensors. It shares functional similarities with other models like the MP34DT01-M and MP34DT05-A, which are also utilized in evaluation boards such as the STEVAL-BLUEMIC-1 and STEVAL-MIC001V1. These components are commonly integrated into development kits for audio processing and wireless communication applications.

Microphones Replacement Considerations

Public documentation lists the MP34DT05-A as a compatible alternative found in similar evaluation hardware. Verify pinout compatibility and electrical parameters before substitution.