MP45DT02TR-M

Microphones Overview

The MP45DT02TR-M is a digital MEMS microphone manufactured by STMicroelectronics, designed for high-fidelity audio capture in compact electronic devices. It features a top-port acoustic design with omnidirectional sensitivity and outputs Pulse Density Modulation (PDM) data. The device operates within a supply voltage range of 1.64 V to 3.6 V, consuming approximately 650 µA of current. Key performance metrics include a frequency response from 100 Hz to 10 kHz, a signal-to-noise ratio (SNR) of 61 dB, and a sensitivity of -26 dB ±3 dB at 94 dB SPL. The component is housed in a surface-mount HLGA package measuring 4.72 mm x 3.76 mm x 1.38 mm.

Microphones Feature Summary

• Integrates a MEMS sensor element with an on-chip ASIC for direct digital PDM output
• Features a top-port acoustic structure allowing flexible PCB placement
• Provides omnidirectional sound pressure level detection
• Operates with low power consumption suitable for battery-powered applications

Microphones Applications

• Smart speakers and voice assistant devices
• Mobile phones and tablets
• Wearable audio equipment
• Internet of Things (IoT) voice-enabled nodes

Microphones Procurement Notes

Verify the specific suffix 'M' against official STMicroelectronics documentation to confirm if it denotes a specific tape-and-reel configuration or environmental compliance variant distinct from the standard MP45DT02TR. Confirm current lifecycle status as sources indicate potential obsolescence for related variants. Ensure compatibility with host controller PDM interfaces before procurement.

Microphones Selection Notes

Select this component when a digital interface is required to eliminate analog noise susceptibility in long trace lengths. The top-port design facilitates optimal acoustic coupling in constrained enclosures compared to side-port alternatives. Verify that the host microcontroller supports PDM decoding or utilizes an external decoder IC, as the output is not I²S compatible without conversion.

Microphones Part Context

This part belongs to the MP45 series of digital MEMS microphones from STMicroelectronics. It serves as a core audio input transducer for modern smart audio systems. The device replaces traditional analog microphones by integrating signal conditioning directly onto the silicon die, simplifying board layout and improving overall system signal integrity through digital transmission.

Microphones Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate alternative STMicroelectronics digital MEMS microphones based on pinout compatibility and acoustic specifications.