DMM-3537-B

Overview

The PUI Audio DMM-3537-B is a digital MEMS microphone featuring a specialized pre-amplification ASIC for high sensitivity and SNR. It operates at 1.8 VDC with a current draw of 310 uA. Key electrical parameters include a sensitivity of -37 dB, an SNR of 67 dB, and a frequency range of 20 Hz to 20 kHz. The device has a 400 Ohm impedance and supports an acoustic overload point (AOP) of 135 dB. It functions within a supply voltage range of 1.65 V to 1.98 VDC and operates between -40°C and +85°C.

Feature Summary

• Digital PDM output interface integrated with specialized pre-amplification ASIC
• Omnidirectional acoustic design for uniform sound capture
• High signal-to-noise ratio performance optimized for voice applications

Applications

• Voice recognition systems
• Smart home devices
• Mobile communication equipment

Procurement Notes

Verify the specific suffix and revision level against the manufacturer's latest datasheet to ensure compatibility with your system requirements. Confirm that the digital PDM interface matches your host processor's input specifications. Check for any updated environmental compliance certifications required for your region before finalizing procurement orders.

Selection Notes

Select this component when a digital output is preferred over analog to reduce noise susceptibility in PCB layout. Ensure the 1.8V operating voltage aligns with your system's power rails. Consider the 310 uA current consumption for battery-powered designs. Verify that the physical dimensions fit within the available space constraints of the target enclosure.

Part Context

This part belongs to the PUI Audio DMM series of digital MEMS microphones. These components are designed to replace traditional analog microphones by providing direct digital output, simplifying circuit design and improving audio quality in compact electronic devices.

Replacement Considerations

Check for compatible substitutes such as the DMM-3537-2-B or other members of the DMM series. Ensure pinout compatibility and identical electrical characteristics when swapping parts to avoid redesigning the host circuitry.