TDK Corporation introduces the InvenSense ICS-40638 MEMS analog microphone. 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 is equipped with high dynamic range, operates up to 105°C, 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 cancelling 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.”
- MEMS: Micro-Electrical Mechanical System
- AOP: Acoustic Overload Point
- SPL: Sound Pressure Level
- SNR: Signal to Noise Ratio
- IoT: Internet of Things
- OEM: Original Equipment Manufacturing
- IoT devices
- Still/Video Cameras
- 5 mm x 2.65 mm x 0.98 mm package bottom port surface‐mount package
- 138 dB AOP SBL
- 63 dB SNR
- Differential analog output
- −43 dBV sensitivity (differential)
- ±1 dB sensitivity tolerance
- Extended frequency response from 35 Hz to 20 kHz
- Enhanced RF immunity
- −81 dB PSRR
- Compatible with Sn/Pb and Pb‐free solder processes
- RoHS/WEEE compliant
- Product ICS-40638
- Packaging Dimensions (mm) 3.50 × 2.65 × 0.98
- SNR dBA 63
- Acoutsic Overload Point (dB SPL) 138
- Supply Current (µA) 170
- Bandwidth (kHz) 20
- Low Frequency Corner Hz 35
- Interface Differential Analog
The InvenSense ICS-40638 part and the ICS-40638 evaluation board (EVB) are now available from multiple distributors worldwide.