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 CH201 provides accurate range measurements to targets at distances up to 5m. 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 20 cm to 5 m 0.2 mm at 1 m range I²C Up to 180


  • Accurate range measurement regardless of target size or color; even optically transparent targets are accurately detected
  • Ability to operate in all lighting conditions — Direct Sunlight to complete Darkness
  • Ultra-Low power – less than 15uW of power consumption
  • Wide field-of-view – Detects objects over a field-of-view up to 180°