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


Product details


Type FE Sensor resolution Output format Digital Frame rate (Max) (FPS) 4000 Operating temperature range (C) -40 to 85 open-in-new Find other Time of flight (ToF) sensors

Package | Pins | Size

VQFN (RHF) 28 20 mm² 5 x 4 open-in-new Find other Time of flight (ToF) sensors


  • 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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open-in-new Find other Time of flight (ToF) sensors


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.

open-in-new Find other Time of flight (ToF) sensors

Technical documentation

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Type Title Date
* Data sheet OPT3101 ToF-Based Long-Range Proximity and Distance Sensor AFE datasheet (Rev. A) Jun. 26, 2018
E-book Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
E-book E-book: An engineer’s guide to industrial robot designs Feb. 12, 2020
Technical article How to choose the right proximity sensor for your design needs Oct. 31, 2019
User guide Introduction to Time-of-Flight Long Range Proximity and Distance Sensor System (Rev. B) Aug. 12, 2019
Application note How to select the right proximity sensor technology Jul. 19, 2019
User guide How to set up and calibrate OPT3101 based systems for proximity sensing Feb. 27, 2019
Application note Accurate distance measurements with a highly integrated ToF position sensor Feb. 26, 2019
Application note Accurate Measurements with OPT3101 Oct. 04, 2018
Application note Extending the Range of OPT3101 Systems Oct. 04, 2018
User guide OPT3101 System Estimator Jun. 29, 2018
User guide OPT3101 Evaluation Module User's Guide (Rev. A) Jun. 26, 2018
Application note OPT3101 in Precise Distance Measurement and Ranging Applications Jun. 21, 2018
Application note 单点ToF AFE OPT3101的HDR功能及应用 Apr. 08, 2018
User guide OPT3101 Distance Sensor System Calibration Feb. 23, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The OPT3101 evaluation module (EVM) is intended for evaluating the OPT3101, which is a high-speed, high-resolution analog front end (AFE) for continuous-wave, time-of-flight (ToF)-based proximity sensing and range finding. OPT3101 integrates a complete depth processing pipeline that (...)

  • Evaluation module for ToF-based proximity sensing and range finding
  • Acquire data at up to 4 ksps in evaluation mode
  • USB-based power and PC application connectivity and USB-based firmware upgrade option
  • Access to device registers via easy-to-use GUI
  • Nonvolatile memory in EVM that stores calibration data
  • (...)
The TFmini Plus module is based on TI's OPT3101 and is a single-point short-range LiDAR sensor.  The sensor is low cost, small size and low power consumption with excellent performance produced by Benewake.

Learn more about Benewake at http://en.benewake.com.

Software development

OPT3101 software development kit (SDK)
OPT3101-SDK The OPT3101 software development kit (SDK) provides a C++ library of functions to control and calibrate systems using the OPT3101, which is a time-of-flight (ToF)-based, long-range proximity and distance sensor analog front end (AFE).
  • Enables access to registers by name instead of physical address
  • Enables control and access to groups of registers to achieve specific functionality
  • Contains data types (classes) to hold, analyze, and report calibration data
  • Allows templatizing of classes for environment and host controls
SBAC203A.ZIP (9687 KB)
SBAC196B.ZIP (38369 KB)
OPT3101 configurator tool
OPT3101CONFIG-SW The OPT3101 time-of-flight (ToF) analog front end (AFE) configurator tool is an offline graphical user interface (GUI) for customizing the configuration of the OPT3101, which is a ToF-based, long-range proximity and distance sensor AFE. OPT3101CONFIG-SW provides a high level of abstraction (...)
  • Allows for adjustment of frame count, maximum ambient current support setting, and more in General Device Settings
  • Enables selection of the illumination current desired for up to three emitters and determine sequence order
  • Mode settings
    • Monoshot
    • Auto HDR
    • Super HDR
SBAC202A.ZIP (32789 KB)

Design tools & simulation

SBAM388.ZIP (44 KB) - IBIS Model
OPT3101 system estimator tool
OPT3101ESTIMATOR-SW The OPT3101 system estimator tool analyzes the performance of the OPT3101, which is a time-of-flight (ToF)-based, long-range proximity and distance sensor analog front end (AFE). The tool determines if the OPT3101 is able to meet design requirements under various conditions.
document-generic User guide
  • Input system specifications
  • Reports AFE output characteristics
  • Reports graphs for distance noise versus distance, distance accuracy versus distance, and amplitude versus distance
  • Reports selected tabs
    • Tab parameters: One or two inputs with minimum, maximum, number of steps, and output
    • Plots: Can either (...)

Reference designs

Obstacle, cliff detection and stuck prevention all-in-one reference design for robotic applications
TIDA-010077 — Obstacle avoidance, cliff detection, stuck prevention and wall follow are all necessary features for robotic systems. This reference design uses optical time-of-flight (ToF) techniques to build small and cost-effective proximity sensor systems to achieve these features and solve the problem of (...)
document-generic Schematic document-generic User guide
Wide-range (120° FoV at 1.6 meters) proximity sensing reference design with immunity to sunlight
TIDA-010021 — Proximity sensing with wide field-of-view (FoV) is getting more and more popular and important for people detection in many applications. This reference design uses optical time-of-flight (ToF) techniques to build small and cost-effective proximity sensor systems. A single proximity and distance (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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VQFN (RHF) 28 View options

Ordering & quality

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