MP34DB01

Microphones Overview

The MP34DB01 is an ultra-compact, low-power, omnidirectional digital MEMS microphone manufactured by STMicroelectronics. It integrates a capacitive sensing element with a CMOS IC interface capable of stereo operation. The device detects acoustic waves and converts them into a digital PDM signal. Key electrical parameters include a supply voltage range of 1.64 V to 3.6 V, a typical supply current of 650 µA, and a frequency response of 20 Hz to 20 kHz. It features a sensitivity of -26 dBFS ±3dB at 94 dB SPL, a signal-to-noise ratio of 62.6 dB, and an acoustic overload point of 120 dBSPL.

Microphones Feature Summary

• Omnidirectional digital output using PDM single-bit format with optional stereo configuration
• Bottom-port design with EMI-shielded SMD-compliant package
• High acoustic overload point of 120 dBSPL combined with high signal-to-noise ratio
• Operates over an extended temperature range from -40 °C to +85 °C

Microphones Applications

• Digital audio input for IoT devices and smart speakers
• Voice recognition systems requiring low power consumption
• Audio decoding and streaming via microcontrollers like STM32
• Evaluation boards for digital MEMS microphone signal processing

Microphones Procurement Notes

Verify component status as the MP34DB01 is listed as obsolete in public records. Confirm availability through authorized distributors or secondary markets if immediate procurement is required. Ensure compatibility with existing PCB footprints and verify that replacement components meet the same RHLGA package dimensions and pinout specifications for seamless integration.

Microphones Selection Notes

Select this component for applications requiring a compact, bottom-port digital microphone with high acoustic performance. It is suitable for designs needing a wide dynamic range and low power consumption. Consider the PDM interface requirements when choosing host processors. Evaluate the need for stereo capability if multiple units are deployed in close proximity.

Microphones Part Context

The MP34DB01 belongs to the MP34 family of digital MEMS microphones from STMicroelectronics. It utilizes specialized silicon micromachining for the sensing element and CMOS processes for the interface IC. This technology allows for high reliability and consistent performance in consumer electronics and industrial audio applications where size and power efficiency are critical constraints.

Microphones Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation due to the component's obsolete status. Engineers should consult official STMicroelectronics resources for current recommended replacements within the MP34 series or equivalent digital MEMS solutions.