TDK Announces Ultra-high AOP Analog MEMS Microphone ICS-40638 Enabling Clear Audio Capture in Loud and Noisy Conditions

时间： 2023-07-22 来源：TDK InvenSense News

技术问答

Key points:

High-performance microphone offering 138dB SPL AOP
Enabling clear audio capture in loud and noisy conditions
Extended frequency response from 35 Hz to 20kHz

August 5, 2020——TDK Corporation introduces the InvenSense ICS-40638 MEMS analog microphone. The ICS-40638 ultra-high AOP Analog MEMS microphone offers an ultra-high Acoustic Overload Point (AOP) of 138dB Sound Pressure Level (SPL), exceptionally efficient 170µA low power operation, and a high Signal Noise Ratio (SNR) of 63dB in a small 3.5mmx2.65mmx0.98mm bottom port surface‐mount package. The analog MEMS microphone is equipped with a high dynamic range, operates up to 105℃, and is designed for IoT and consumer devices.

The new ICS-40638 microphone is ideal for wearable and IoT applications, particularly in outdoor, industrial, or harsh environments, where high temperature and high acoustic overload points present system design challenges. The ICS-40638 includes a MEMS microphone element, an impedance converter, and a differential output amplifier. Other high‐performance specifications include a tight ±1 dB sensitivity tolerance and enhanced immunity to both radiated and conducted RF interference. The part is ideal for noise-canceling applications in challenging environments.

"TDK has a strong presence in the wearable and IoT market segments and our full-line of MEMS microphones makes us the ideal partner to solve our customers' audio challenges," said Kieran Harney, Managing Director, Audio Products, InvenSense, a TDK group company. "The ICS-40638 with its ultra-high AOP and high-temperature operation enables our partners to design acoustic listening systems that stand up to the loudest and noisiest environmental surroundings."

Main applications

Wearables

IoT devices

Automotive

Still/Video Cameras

Key features

5mmx2.65mm x 0.98mm package bottom port surface‐mount package

138dB AOP SBL

63dB SNR

Differential analog output

−43dBV sensitivity (differential)

±1dB sensitivity tolerance

Extended frequency response from 35Hz to 20kHz

Enhanced RF immunity

−81dB PSRR

Compatible with Sn/Pb and Pb‐free solder processes

RoHS/WEEE compliant

Key data

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