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  3. STMicroelectronics — VL53L5CX Time-of-Flight Multizone Ranging Sensor

STMicroelectronics — VL53L5CX Time-of-Flight Multizone Ranging Sensor

 

STMicroelectronics

STMicroelectronics – VL53L5CX Time-of-Flight Sensor

Multizone up to 8x8 ranging and with 63° diagonal wide field of view

The STMicroelectronics VL53L5CX is a state of the art, Time-of-Flight (ToF), multizone ranging sensor enhancing the ST FlightSense product family. Housed in a miniature reflowable package, it integrates a SPAD array, physical infrared filters, and diffractive optical elements (DOE) to achieve the best ranging performance in various ambient lighting conditions with a range of cover glass materials. VL53L5CX_web.jpgThe use of a DOE above the vertical cavity surface emitting laser (VCSEL) allows a square FoV to be projected onto the scene. The reflection of this light is focused by the receiver lens onto a SPAD array.

Unlike conventional IR sensors, the VL53L5CX uses ST's latest generation, direct ToF technology which allows absolute distance measurement whatever the target color and reflectance. It provides accurate ranging up to 400 cm and can work at fast speeds (60 Hz), which makes it the fastest, multizone, miniature ToF sensor on the market.

Multizone distance measurements are possible up to 8x8 zones with a wide 63 ° diagonal FoV which can be reduced by software

Thanks to ST Histogram patented algorithms, the VL53L5CX is able to detect different objects within the FoV. The Histogram also provides immunity to cover glass crosstalk beyond 60 cm.

Features

  • Fast and accurate multizone distance ranging sensor
    • Multizone ranging output with either 4x4 or 8x8 separate zones
    • Autonomous Low-power mode with interrupt programmable threshold to wake up the host
    • Up to 400 cm ranging
    • Multitarget detection and distance measurement in each zone
    • 60 Hz frame rate capability
    • Histogram processing and algorithmic compensation minimizes or removes impact of cover glass crosstalk
    • Motion indicator for each zone to show if targets have moved and how they have moved
  • Fully integrated miniature module with wide field of view (FoV)
    • _940 nm invisible light vertical cavity surface emitting laser (VCSEL) and integrated analog driver
    • 63° diagonal square FoV using diffractive optical elements (DOE) on both transmitter and receiver
    • Receiving array of single photon avalanche diodes (SPADs)
    • Low-power microcontroller running Firmware
    • Size: 6.4 x 3.0 x 1.5 mm
  • Easy integration
    • Single reflowable component
    • Flexible power supply options, single 3.3 V or 2.8 V operation or combination of either 3.3 V or 2.8 V AVDD with 1.8 V IOVDD
    • Compatible with wide range of cover glass materials

Applications

  • Scene understanding. Multizone and multi-object distance detection enables 3D room mapping and obstacle detection for robotics applications
  • Wide FoV and multizone scanning allows content management (load in trucks, tanks, waste bins)
  • Gesture recognition
  • Liquid level control
  • Keystone correction for video projectors
  • Laser assisted autofocus (LAF). Enhances the camera AF system speed and robustness especially in difficult low light or low contrast scenes
  • Augmented reality/virtual reality (AR/VR) enhancement. Dual camera stereoscopy and 3D depth assistance thanks to multizone distance measurement
  • Smart buildings and smart lighting (user detection to wake up devices)
  • IoT (user and object detection)
  • Video focus tracking. 60 Hz ranging allows optimization of continuous focus algorithm

 

VL53L5CX System Block Diagram

STMicroelectronics — VL53L5CX System Block Diagram

 

VL53L5CX Application schematic

STMicroelectronics — VL53L5CX Application schematic

Note: Capacitors on the external supplies (AVDD and IOVDD) should be placed as close as possible to the module pins.

 

Breakout Board for VL53L5CX

The VL53L5CX-SATEL breakout boards can be used for easy integration into customer devices. The PCB section supporting the VL53L5CX module is perforated so that developers can break off the mini PCB for use in a 3.3 V supply application using flying wires. This makes it easier to integrate the VL53L5CX-SATEL breakout boards into development and evaluation devices due to their small size.

STMicroelectronics — VL53L5CX-SATEL Breakout Board for VL53L5CX

Setup & Run VL53L5CX-SATEL

Features:

  • VL53L5CX Time-of-Flight 8x8 multizone ranging sensor with wide field of view
  • _5 to 3.3 V range input voltage (output voltage_ 3.3 V)
  • True distance measurement independent of target size and reflectance
  • Divisible board enabling use as mini PCB breakout board, easy to integrate in customer device

New Technologies For Distance And Movement Tracking

STMicroelectronics — VL53L5CX Time-of-Flight Multizone Ranging Sensor