AMM-2738-2-B

Overview

The PUI Audio AMM-2738-2-B is an analog MEMS microphone designed for compact audio sensing applications. It features a frequency range of 20 Hz to 20 kHz and a signal-to-noise ratio (SNR) of 65 dB. The device operates with a supply current of 150 uA and presents an impedance of 300 Ohms. It utilizes an SMD-3 package with physical dimensions of 2.75 mm x 0.9 mm.

Feature Summary

• Analog output interface for direct integration into standard audio circuits
• Compact surface-mount form factor suitable for space-constrained designs
• Wide audible frequency response covering standard speech and audio bands

Applications

• Consumer electronics audio input modules
• Voice recognition systems requiring low-power microphones
• Portable communication devices

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's latest documentation to confirm pinout and electrical tolerances. Ensure the ordering part number matches the required sensitivity and SNR specifications for the target application. Cross-reference the datasheet revision date to validate current manufacturing status and compliance certifications before finalizing procurement orders.

Selection Notes

Select this component when a small footprint is critical, as the 2.75 mm length is significantly smaller than standard 4 mm or 3.5 mm MEMS packages. Choose the analog variant over digital PDM options if the host system lacks digital audio interfaces or requires simpler biasing circuits. Evaluate the 300 Ohm impedance compatibility with the preamplifier input stage to ensure optimal signal transfer and noise performance.

Part Context

This model belongs to the PUI Audio AMM series of analog MEMS microphones. It shares the same miniature 2.75 mm x 0.9 mm SMD-3 package profile with other variants in the line, such as the AMM-2738-3-B. While it offers lower SNR compared to larger 3.5 mm or 4 mm models, it provides a balance between size reduction and acoustic performance for basic audio capture tasks.

Replacement Considerations

Public confirmed substitute part numbers: AMM-2738-3-B.