ADMP621ACEZ-RL

Overview

The ADMP621ACEZ-RL is a digital MEMS microphone manufactured by Analog Devices Inc. It features a PDM digital output and omnidirectional sound pickup. The device operates within a voltage range of 1.62 V to 3.63 V and supports a frequency range of 45 Hz to 20 kHz. Key electrical parameters include a sensitivity of -46 dB ±2 dB at 94 dB SPL, a signal-to-noise ratio of 65 dB, and a supply current of 1.6 mA. It utilizes solder pad termination and is packaged in a rectangular form factor measuring 4.00 mm x 3.00 mm with a maximum height of 1.10 mm.

Feature Summary

• Integrates a silicon MEMS sensor with an on-chip analog-to-digital converter for direct digital interface compatibility.
• Provides high dynamic range audio capture suitable for demanding acoustic environments.
• Features a compact surface-mount package designed for integration into portable electronic devices.

Applications

• Smartphones and mobile communication devices
• Voice recognition systems
• Consumer electronics requiring digital audio input

Procurement Notes

Verify the specific suffix (RL) against the manufacturer's latest documentation to confirm packaging configuration and tape-and-reel specifications. Ensure that the operating voltage requirements align with the system power rails, as the device requires a stable supply between 1.62 V and 3.63 V. Cross-reference the pinout diagram with the PCB layout to guarantee correct orientation and solder pad alignment during assembly.

Selection Notes

Select this component when a digital PDM interface is required to simplify system architecture by eliminating external analog-to-digital conversion stages. Consider the -46 dB sensitivity and 65 dB SNR for applications needing clear voice capture in moderate noise conditions. Evaluate the small footprint dimensions against available board space constraints in dense consumer electronics designs.

Part Context

This part belongs to the ADMP621 series of digital microphones from Analog Devices Inc. It represents a class of MEMS devices that combine acoustic sensing with signal processing in a single package. The series is designed to replace traditional analog microphones in modern digital audio applications, offering improved noise immunity and simplified interfacing with host processors.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.