Chirp’s MEMS ultrasonic technology leverages a proprietary Time-of-Flight (ToF) range 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.

Complementing Chirp’s other ultrasonic ToF sensor products, the CH-101 provides accurate range measurements to targets at distances up to 1.2m. Using ultrasonic pulse-echo measurements, the sensor works in any lighting conditions, including full sunlight, and provides millimeter-accurate range measurements independent of the target’s color and optical transparency. The sensor’s wide Field-of-View (FoV) enables simultaneous range measurements to multiple objects in the FoV.

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Product Details

Part # Package Size Range Range Noise Interface Field Of View
UNITS: (mm) (m) (degrees)
3.5 x 3.5 x 1.26 Up to 1m 30 cm I2C Up to 180

Comprehensive development platform for CH-101, a miniature ultrasonic transducer with a range of 4 cm to 120 cm.

3.5 x 3.5 x 1.26 20 cm to 5 m 0.2 mm at 1 m range I²C Up to 180


  • Ultralow power
  • Accurate range measurement regardless of target size
  • Detects objects of any color, including optically transparent ones
  • Immunity to ambient noise
  • Works under any lighting condition
  • Expanded field of view (FoV)