INMP404ACEZ-R7

Microphones Overview

The INMP404ACEZ-R7 is an omnidirectional MEMS silicon microphone featuring analog output. It operates within a frequency range of 100 Hz to 15 kHz or 20 kHz, depending on specific documentation variants. The device supports supply voltages from 1.5 V to 3.3 V and draws a supply current of approximately 225 µA. Sensitivity is rated at -38 dB ±3 dB @ 94 dB SPL with a signal-to-noise ratio of 62 dB to 65 dB. It utilizes solder pads for termination and has dimensions of 3.35 mm x 2.50 mm x 0.98 mm.

Microphones Feature Summary

• Omnidirectional acoustic capture capability for uniform sound pickup
• Analog output interface compatible with standard audio processing circuits
• Bottom port design for effective noise isolation and sensitivity

Microphones Applications

• Consumer electronic audio recording devices
• Voice recognition systems in smart home appliances
• Portable communication equipment requiring low-power microphones

Microphones Procurement Notes

Verify component authenticity through authorized TDK InvenSense channels due to obsolete status. Confirm datasheet revision matches required electrical parameters, as variations exist between 15 kHz and 20 kHz bandwidth specifications. Ensure handling complies with MSL level requirements during assembly processes.

Microphones Selection Notes

Choose this component for applications requiring compact form factors and analog signal interfaces. Consider the specific frequency response limits when designing for high-fidelity audio. Evaluate power consumption constraints against the 225 µA operating current to ensure system battery life targets are met effectively.

Microphones Part Context

This part belongs to the INMP404 series of MEMS microphones by TDK InvenSense. It represents a legacy product line now marked as obsolete, having been succeeded by newer generations like the INMP510. The series focuses on providing reliable analog audio sensing solutions for mass-market consumer electronics.

Microphones Replacement Considerations

The INMP510ACEZ-R7 serves as a functional successor with similar sensitivity and package dimensions but offers improved frequency response down to 60 Hz. Designers should verify pin compatibility and adjust biasing networks if transitioning to the newer model.