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Texas Instruments OPT3101 ToF Sensors

Texas Instruments OPT3101 Time-of-Flight (ToF) Sensors are high-speed, high-resolution Analog Front End (AFE) for continuous-wave, ToF-based proximity sensing and range-finding sensors. These sensors integrate the complete depth processing pipeline, including the ADC, time sequencer, and digital processing engine. The OPT3101 ToF sensors include a built-in illumination driver that covers most of the target applications. These sensors feature long-range distance measurement, de-aliasing to extend the distance range, obstacle detection and avoidance, and up to 4kHz of the sample rate. Typical applications include conveyor belt systems, factory automation, harsh environments, drones, vacuum cleaners, lawnmowers, robots, smoke detectors, and emergency exits.

Features

  • Long-range distance measurement, obstacle detection, and avoidance
  • Flexibility to customize the design with a wide variety of photodiodes and emitters
  • Sample rate up to 4kHz
  • I2C interface for control and data
  • Integrated illumination driver with programmable current control up to 173mA
  • Integrated temperature sensor for calibration
  • Single 3.3V or 1.8V and 3.3V supply operation
  • -40°C to 85°C operating ambient temperature
  • 16-bit distance output at 15m unambiguous range
  • De-aliasing to extend the distance range
  • Supports 3 transmitter channels for multi-zone operation
  • Excellent ambient and sunlight rejection
  • 200nA full-scale signal current
  • 88dB signal phase dynamic range at 1kHz
  • Supports DC ambient up to 200µA and 60dB rejection for ambient at 1kHz
  • Distance measurement independent of object reflectivity
  • Adaptive HDR to save power and increase the dynamic range
  • Configurable event detection and interrupt output mechanism

Applications

  • Obstacle detection and avoidance:
    • Precise distance measurement for drone landing and navigation
    • Cliff and edge detection in vacuum cleaners
    • Perimeter scan in an automatic guided vehicle:
      • Lawnmowers
      • Robots
    • Obstruction sensing:
      • Smoke detectors
      • Emergency exits
  • Precise long-range distance measurement:
    • Background suppression and accurate object counting in high-speed conveyor belt systems
    • Precise displacement sensing in factory automation
    • Non-contact distance or level measurement in harsh environments

Additional Resources

Block Diagram

Block Diagram - Texas Instruments OPT3101 ToF Sensors
Published: 2018-07-11 | Updated: 2023-10-30