INMP404

Microphones Overview

The INMP404 is an ultra-low noise, omnidirectional MEMS microphone featuring a bottom port and analog output. It operates on a supply voltage range of 1.6 V to 3.3 V with a typical operating current of 200 µA. The device provides a sensitivity of -38 dB and a signal-to-noise ratio (SNR) of 65 dB. Its frequency response spans from 100 Hz to 16 kHz, supporting an acoustic pressure level of 160 dB SPL. The component is housed in a compact LGA-3 package measuring 3.35 mm x 2.2 mm x 0.88 mm.

Microphones Feature Summary

• Ultra-low noise performance for high-fidelity audio capture
• Omnidirectional acoustic design with bottom port configuration
• Analog output interface eliminating the need for digital conversion

Microphones Applications

• Smartphones and mobile communication devices
• Voice-controlled smart home appliances
• Portable consumer electronics requiring low power consumption

Microphones Procurement Notes

Verify the specific suffix code against the manufacturer's official datasheet to confirm exact packaging and tape-and-reel specifications. Ensure compliance with RoHS directives and humidity sensitivity handling requirements during storage and assembly processes.

Microphones Selection Notes

Select this component when an analog output interface is required rather than PDM or I2S digital outputs. It is suitable for applications prioritizing low power consumption alongside high signal-to-noise ratio performance within a minimal footprint constraint.

Microphones Part Context

This part belongs to the TDK InvenSense MEMS microphone portfolio, designed for mobile and IoT markets. It complements digital microphone offerings by providing an analog alternative for systems utilizing external ADCs or legacy audio codecs.

Microphones Replacement Considerations

Consult official substitution lists for direct pin-compatible alternatives. Verify that any replacement maintains the same analog output type and package dimensions to ensure mechanical fit.