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TDK MEMS-based Ultrasonic ToF Sensor

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TDK Corporation's has announced the immediate worldwide availability of the Chirp CH-101 MEMS-based ultrasonic Time-of-Flight (ToF) sensor. This ToF sensor utilizes a tiny ultrasonic transducer chip to send out a pulse of ultrasound and then listen for echoes returning from targets in the sensor's field-of-view. By calculating the ToF, the sensor can determine the location of an object relative to a device and trigger a programmed behavior.

TDK's MEMS ultrasonic technology leverages a proprietary ToF sensor in a 3.5 mm x 3.5 mm package that combines a MEMS ultrasonic transducer with a power-efficient digital signal processor (DSP) on a custom low-power mixed-signal CMOS ASIC. The sensor handles a variety of ultrasonic signal-processing functions, enabling customers flexible industrial design options for a broad range of use-case scenarios, including range-finding, presence/proximity sensing, object-detection/avoidance, and position-tracking.

CH-101 is the first commercially available MEMS-based ultrasonic ToF sensor intended for consumer electronics, AR/VR, robotics, drones, IoT, automotive, and industrial market segments. TDK's MEMS ultrasonic product portfolio also includes the CH-201 ultrasonic ToF sensor for room-scale sensing applications, and Chirp SonicTrack, a complete hardware-software system solution enabling inside-out 6-DoF controller tracking for AR/VR/MR systems.

TDK's MEMS ultrasonic ToF sensor solutions offer numerous advantages over optical ToF sensors:

· Accurate range measurement regardless of target size or color; even optically transparent targets are accurately detected

· Immunity to ambient noise

· Ability to operate in all lighting conditions — unlike IR sensors, which do not work in direct sunlight

· Ensures eye-safety — contrasting with laser-based IR ToF sensors - and yet not perceivable by house pets

· Detects objects over a field-of-view up to 180° — enabling a single sensor to support room-scale sensing

“The CH-101 sensor is the culmination of years of development based on a breakthrough innovation in piezoelectric-MEMS technology and low-power ASIC design, resulting in high-performance, low-power ultrasonic sensing in a tiny package,” said Michelle Kiang, CEO, Chirp Microsystems, a TDK Group Company. “For the first time, product designers have available a new ToF sensor option to enable new functionalities and improve user experience in a broad range of consumer products. CH-101-based Chirp SonicTrack provides 6DoF controller tracking in HTC's new Vive Focus Plus All-in-One VR system, which is in mass production today, and both CH-101 and CH-201 sensors are being designed-in by leading consumer brands in smart speakers, robotic vacuum cleaners, PCs, and many more products. We expect to see several additional product launches powered by TDK's MEMS ultrasonic products in the next 12 months.”The CH-101 is in mass production now.

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