OPT3101 ToF-based long-range proximity and distance sensor analog front end (AFE) | TI.com


ToF-based long-range proximity and distance sensor analog front end (AFE)


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The OPT3101 device is a high-speed, high-resolution AFE for continuous-wave, time-of-flight based proximity sensing and range finding. The device integrates the complete depth processing pipeline that includes the ADC, timing sequencer, and the digital processing engine. The device also has a built-in illumination driver that covers most of the target applications.

Given the high ambient rejection ratio, the device can support very high ambient conditions, including full sunlight of 130 klx.

The timing sequencer is highly configurable to provide for application-specific trade-offs of power versus performance.

The device provides depth data that consists of phase, amplitude, and ambient measurements. The calibration subsystem supports phase-data calibration for inaccuracies resulting from temperature and crosstalk.


  • Long-Range Distance Measurement, Obstacle Detection and Avoidance
  • Flexibility to Customize Design With a Wide Variety of Photodiodes and Emitters
  • Sample Rate up to 4 kHz
  • 16-Bit Distance Output at 15-m Unambiguous Range
  • De-Aliasing to Extend the Distance Range
  • Supports 3 Transmitter Channels for Multi-Zone Operation
  • Excellent Ambient and Sunlight Rejection
  • 200-nA Full-Scale Signal Current
  • 88-dB Signal Phase Dynamic Range at 1 kHz
  • Supports DC Ambient up to 200 µA, 60-dB Rejection for Ambient at 1 kHz
  • Distance Measurement Independent of Object Reflectivity
  • Adaptive HDR to Save Power and Increase the Dynamic Range
  • Configurable Event Detection and Interrupt Output Mechanism
  • I2C Interface for Control and Data
  • Integrated Illumination Driver With Programmable Current Control up to 173 mA
  • Integrated Temperature Sensor for Calibration
  • Single 3.3-V or 1.8-V and 3.3-V Supply Operation
  • Operating Ambient Temperature: –40 to 85°C

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Parametrics Compare all products in Time of flight (ToF) sensors

Device type
Sensor Resolution
Output format
Frame rate (Max) (FPS)
Pixel pitch (um)
Operating temperature range (C)
OPT3101 OPT8241 OPT8320 OPT9221
AFE     Sensor + AFE     System-on-Chip (SoC)     ToF Controller    
N/A     320 x 240     80 x 60     NA    
Digital     Raw Correlation Data     Depth Data     Depth Data    
I2C     LVDS     CMOS Parallel Interface, DVP, SSI     DVP Compatible
SSI Compatible    
4000     150     1000     120    
  15     30      
-40 to 85     0 to 70     0 to 70     0 to 70