Back to Texas Instruments

Texas Instruments OPT8241 Time-of-Flight (ToF) Sensor

Texas Instruments OPT8241 Time-of-Flight (ToF) Sensor is part of the TI 3D ToF image sensor family. The device combines ToF sensing with an optimally-designed analog-to-digital converter (ADC) and a versatile, programmable timing generator (TG). The OPT8241 offers quarter video graphics array (QVGA 320x240) resolution data at frame rates up to 150 frames per second (600 readouts per second). The built-in TG controls the reset, modulation, readout, and digitization sequence. The programmability of the TG offers flexibility to optimize for various depth-sensing performance metrics (such as power, motion robustness, signal-to-noise ratio, and ambient cancellation).

Features

  • Imaging array
    • 320×240 array
    • 1/3" optical format
    • 15µm pixel pitch 
    • Up to 150 frames per second
  • Optical properties
    • 0.35A/W at 850nm responsivity 
    • 45% at 50MHz demodulation contrast 
    • 10MHz to 100MHz demodulation frequency 
  • Output data format
    • 12-bit phase correlation data
    • 4-bit common mode (ambient)
  • Chipset interface
    • Compatible with TI's Time-of-Flight controller OPT9221
  • Sensor output interface
    • CMOS data interface (50MHz DDR, 16-lane data, clock, and frame markers)
    • LVDS
      • 600Mbps, 3 data pairs
      • 1-LVDS bit clock pair, 1-LVDS sample clock pair
  • Timing Generator (TG)
    • Addressing engine with programmable Region of Interest (ROI)
    • Modulation control
    • De-aliasing
    • Master, slave sync operation
  • I2C slave interface for control
  • Power supply
    • 3.3V I/O, analog
    • 1.8V analog, digital, I/O
    • 1.5V demodulation (typical)
  • Optimized optical package (COG-78)
    • 8.757mm × 7.859mm × 0.7mm
    • Integrated optical band-pass filter (830nm to 867nm)
    • Optical fiducials for easy alignment
  • 0°C to 70°C operating temperature

Applications

  • Depth sensing
  • Location and proximity sensing
  • 3D scanning
  • 3D machine vision
  • Security and surveillance
  • Gesture controls
  • Augmented and virtual reality

Functional Block Diagram

Block Diagram - Texas Instruments OPT8241 Time-of-Flight (ToF) Sensor

Additional Resources

Published: 2018-04-19 | Updated: 2023-10-31