INMP441ACEZ-R7

Microphones Overview

The INMP441ACEZ-R7 is a digital MEMS microphone manufactured by TDK InvenSense. It features an omnidirectional sound port and outputs high-precision 24-bit data via a standard I²S interface. The device integrates a MEMS sensor, signal conditioning, an anti-aliasing filter, and power management. Key electrical parameters include a sensitivity of -26 dBFS at 94 dB SPL, a signal-to-noise ratio (SNR) of 61 dBA, and a flat frequency response ranging from 60 Hz to 15 kHz. It operates on a supply voltage between 1.5 V and 3.6 V with a typical current consumption of 1.4 mA.

Microphones Feature Summary

• Integrates MEMS sensor, ADC, and digital filtering for direct processor connection
• Provides high-fidelity audio capture with wide dynamic range
• Supports low-power operation suitable for battery-driven devices

Microphones Applications

• Smart home voice assistants
• Industrial acoustic monitoring
• IoT edge AI audio sensing

Microphones Procurement Notes

Verify the specific suffix ACEZ-R7 against official datasheets to confirm tape-and-reel packaging and RoHS compliance status. Ensure compatibility with existing I²S controller configurations before procurement. Confirm availability through authorized distributors as supply chains may fluctuate.

Microphones Selection Notes

Select this component when a compact, omnidirectional digital microphone is required for space-constrained designs. It is optimal for applications needing high SNR and immunity to EMI compared to analog alternatives. Verify that the host system supports I²S interfaces and can handle 24-bit data streams.

Microphones Part Context

This part belongs to the SmartSound family of MEMS microphones from TDK InvenSense. These sensors are designed for consumer, industrial, and automotive markets, emphasizing ultra-low power consumption and high reliability. The INMP441 series specifically targets always-on audio applications requiring clear voice capture.

Microphones Replacement Considerations

Check for compatible I²S MEMS microphones with similar pinouts and electrical characteristics. Verify if alternative models support the same 24-bit resolution and operating voltage range to ensure seamless integration without hardware redesign.