Wide-range (120° FoV at 1.6 meters) proximity sensing reference design with immunity to sunlight
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Key Document


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 sensor AFE (OPT3101) with three external NIR LEDs, and one photodiode covers a total 120° wide FoV and outputs accurate distance of people activity.

  • 3 NIR emitters support up to 3 zones of detection with a single OPT3101
  • Total system field-of-view (FoV) of 120° is covered by three LED emitters and one photodiode
  • Detection range up to 1.5 meters without lens
  • Adaptive HDR allows measurement insensitive to object color and reflectivity and supports operation under high ambient condition (outdoor and indoor conditions)
  • Proximity sensing and direct distance measurement output with accuracy of ±10% 
  • Exempt group lamp classification LED as emitter

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430FR2433  16 MHz MCU with 16KB FRAM, 4KB SRAM, 10-bit ADC, UART/SPI/I2C, timer  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
OPT3101  ToF-based long-range proximity and distance sensor analog front end (AFE)  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
TLC59283  16 channel constant current LED driver with pre-charge FET  LED drivers  Sample & Buy View Design Kits & Evaluation Modules
TLV702  300-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430FR2433 Download Download
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OPT3101 Download Download
TLC59283 Download
TLV702 Download Download
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Technical documentation

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User guide (3)
Title Type Size (KB) Date
PDF 2639 12 Aug 2019
PDF 2562 19 Dec 2018
PDF 1129 23 Feb 2018
Design files (6)
Title Type Size (KB) Date
ZIP 4352 19 Dec 2018
ZIP 993 19 Dec 2018
ZIP 714 19 Dec 2018
ZIP 142 19 Dec 2018
ZIP 102 19 Dec 2018
ZIP 600 19 Dec 2018
More literature (1)
Title Type Size (KB) Date
ZIP 684 19 Dec 2018

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