TDK Unveils New Ultra-High AOP Analog MEMS Microphone Ideal for Noisy Environments

August 6 2020, 01:45
TDK Corporation introduced the InvenSense ICS-40638 MEMS analog microphone, a new high-performance solution enabling clear audio capture in loud and noisy conditions, with an extended frequency response from 35 Hz to 20kHz. The ICS-40638 microphone offers an ultra-high Acoustic Overload Point (AOP) of 138 dB Sound Pressure Level (SPL), exceptionally efficient 170 µA low power operation and high Signal to Noise Ratio (SNR) of 63 dB in a small 3.5 mm x 2.65 mm x 0.98 mm bottom port surface‐mount package. 

The analog MEMS microphone supports high dynamic range signals, operates up to 105°C, and is designed for connected consumer and industrial devices. Its design is ideal for noise cancelling applications in challenging environments.

The new ICS-40638 microphone is ideal for wearable and remote connected devices applications, particularly in outdoor and 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. 

"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," says 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."

The InvenSense ICS-40638 part and the ICS-40638 evaluation board (EVB) are now available from multiple distributors worldwide.
Additional information and application notes are available here.
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