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CH201

CH201 is a miniature, ultra-low power, long-range ultrasonic Time-of-Flight (ToF) range sensor. Based on Chirp’s patented MEMS technology, the CH201 is a system-in-package that integrates a PMUT (Piezoelectric Micromachined Ultrasonic Transducer) together with an ultra-low power SoC (System on Chip) in a miniature, reflowable package. The SoC runs Chirp’s advanced ultrasonic DSP algorithms and includes an integrated microcontroller that provides digital range readings over I2C.

Complementing Chirp’s CH101 ultrasonic ToF sensor product, CH201 provides accurate range measurements to targets at distances up to 5m. Based on ultrasonic pulse-echo measurements, the sensor works in any lighting condition, including full sunlight, and provides millimeter-accurate range measurements independent of the target’s color and optical transparency. The sensor’s Field-Of-View (FOV) can be customized and enables simultaneous range measurements to multiple objects in the FOV. Many algorithms can further process the range information for a variety of usage cases in a wide range of applications.

 

Technical Data

Key Specifications

  • Fast, accurate range-finding
    • Operating range from 20 cm to 5m
    • Programmable modes optimized for long or short-range sensing applications
    • Customizable field of view (FoV) up to 180°
    • Multi-object detection
    • Works in any lighting condition, including full sunlight to complete darkness
    • Insensitive to object color, detects optically transparent surfaces (glass, clear plastics etc.)
  • Easy to integrate
    • Single sensor for receive and transmit
    • Single 1.8V supply
    • I2C Fast Mode compatible interface, data-rates up to 400 kHz
    • Dedicated programmable range interrupt pin
    • Platform-independent software driver enables turnkey range-finding
  • Miniature integrated package
    • 3.5 mmx 3.5mm x 1.26mm, 8-pin LGA package
    • Compatible with standard SMD reflow
    • Low-power SoC running advanced ultrasound firmware
    • Operating temperature range: -40°C to 85°C
  • Ultra-low supply current
    • 1 sample/s:
    o 7.5 μA (1 m max range)
    o 13.5 μA (5 m max range)
    • 25 samples/s:
    o 63 μA (1 m max range)
    o 247 μA (5 m max range)

Part Number

CH201-00ABR

Applications

  • User presence in Home/Building Automation and Personal Electronics
  • Obstacle avoidance
  • Robotics and Drones
  • Ultra-low power remote presence-sensing nodes
  • Augmented/Virtual Reality and Gaming
  • Gesture control
  • Liquid level sensing & shelf inventory monitoring

Downloads

CH202 datasheet (pdf)

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