ICS-40638

Microphones Overview

The ICS-40638 is an analog MEMS microphone featuring a bottom port and differential output. It provides a 138dB SPL acoustic overload point, 63dBA SNR, and -43dBV sensitivity with ±1dB tolerance. Operating at 170μA from 1.8V, it supports frequencies from 35Hz to 20kHz. The component measures 3.5mm x 2.65mm x 0.98mm, operates up to 105°C, and includes enhanced RF immunity.

Microphones Feature Summary

• Ultra-high acoustic overload point for clear audio capture in noisy environments
• Differential analog output with tight sensitivity tolerance
• Enhanced resistance to radiated and conducted RF interference
• Extended high-temperature operation capability

Microphones Applications

• Wearable devices
• IoT equipment
• Automotive systems
• Still/video cameras

Microphones Procurement Notes

Verify the specific suffix against official TDK InvenSense documentation to confirm exact electrical characteristics and packaging options. Ensure compatibility with Sn/Pb or Pb-free soldering processes as required by your manufacturing standards. Confirm RoHS compliance status directly from the manufacturer's declaration before finalizing procurement orders.

Microphones Selection Notes

Select this component when high dynamic range and extreme sound pressure handling are critical. The differential output reduces noise susceptibility in electrically noisy environments. Verify that the system power supply matches the 1.8V requirement and that the PCB layout accommodates the specified bottom-port surface mount dimensions.

Microphones Part Context

This part belongs to the InvenSense SmartSound™ MEMS microphone portfolio. It utilizes advanced CMOS technology integrated with high-performance MEMS elements. The design targets applications requiring robust audio performance under challenging environmental conditions, such as high heat or intense acoustic backgrounds.

Microphones Replacement Considerations

Consult official substitution lists for verified alternatives. Generic replacements may not match the specific 138dB SPL overload point or differential output configuration.