PMM-3738-WP-R

Microphones Overview

The PMM-3738-WP-R is a piezoelectric MEMS microphone manufactured by PUI Audio, Inc. It features an analog output and omnidirectional sound pickup. The device operates within a voltage range of 1.6 V to 3.6 V with a rated voltage of 2.1 V and a supply current of 150 µA. Key electrical specifications include a sensitivity of -37 dB ±3 dB at 94 dB SPL, a signal-to-noise ratio of 61 dB, and an impedance of 400 ohms. The frequency response spans from 100 Hz to 10 kHz. Physically, it measures 3.76 mm in length and 2.95 mm in width, with a maximum height of 1.10 mm. It offers IP68 protection against dust and water.

Microphones Feature Summary

• Piezoelectric MEMS technology for analog audio capture
• IP68 rated environmental sealing for dust and water resistance
• Omnidirectional acoustic porting for uniform sound reception

Microphones Applications

• Wearable electronics requiring moisture resistance
• Industrial equipment operating in dusty environments
• Medical devices needing robust acoustic sensing

Microphones Procurement Notes

Verify the specific revision suffix and manufacturing date code upon ordering, as component variants may exist within the same base model number. Confirm that the IP68 rating aligns with your enclosure design requirements, as this performance depends on proper mounting and sealing during assembly. Check for end-of-life status or alternative sourcing options if long-term availability is critical for your production timeline.

Microphones Selection Notes

Select this component when high environmental durability is required alongside standard analog microphone functionality. The low power consumption of 150 µA makes it suitable for battery-operated devices. Ensure the 400 ohm impedance matches your preamplifier input stage. Consider the rectangular footprint dimensions for PCB layout constraints compared to circular microphone packages.

Microphones Part Context

This part belongs to the PMM series of piezoelectric MEMS microphones from PUI Audio, Inc. The series focuses on providing rugged audio solutions for harsh environments. Unlike standard silicon MEMS microphones, these utilize piezoelectric materials to achieve higher durability and water resistance ratings, making them distinct from the AMM series which typically offers different sensitivity and noise characteristics.

Microphones Replacement Considerations

No public confirmed substitute part numbers are available.