Qwiic ToF Imager - VL53L5CX Hookup Guide

Contributors: Nate, Ell C

Hardware Overview

VL53L5CX

The SparkFun Qwiic ToF Imager and Qwiic ToF Mini are state of the art, 64 pixel Time-of-Flight (ToF) 4 meter ranging sensors built around the VL53L5CX from ST. To see more details, refer to the datasheet.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

Qwiic Connectors

Our Qwiic Ecosystem makes sensors pretty much plug and play. There are two Qwiic connectors on either side of the Qwiic Air Velocity Sensor board to provide power and I²C connectivity simultaneously.

The 7-bit unshifted I²C address (most commonly used with Arduino) is 0x29. The 8-bit I²C address of the board is 0x52 for writing and 0x53 for reading.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

Power

Ideally power will be supplied by the Qwiic connector, but if you wish to supply your own power, pins have been broken out along the bottom side of the board labeled 3V3 and GND. The input voltage range should be between 2.7-3.3V.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

I²C

The I²C pins break out the functionality of the Qwiic connectors. Depending on your application, you can connect to these pins via the plated through holes for SDA and SCL.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

INT and RST

The interrupt pin is the interrupt output and defaults to an open-drain output. A 47 kΩ pull-up resistor to IOVDD is included.

The reset pin is the I²C interface reset pin and is active high. It is pulled to ground with a 47 kΩ resistor.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

LP, VDDIO, & VDDA

The pins in this section are specific to the 1"x1" board. LP is a low power enable pin. Drive this pin to logic 0 to disable the I²C comms to reduce power consumption. Drive this pin to logic 1 to enable I²C comms. This pin is typically only needed when you need to change the I2C address in multidevice systems. A 47 kΩ pull-up resistor to IOVDD is included so it can be left unconnected.

VDDIO/VDDA: These pins are used as an alternate power supply. By default, VDDIO and VDDA are tied together but by opening the PSU jumper they can be isolated. A user must then provide separate VDDIO and VDDA supplies. This is most applicable for users who want to use IO voltages (1.8, 2.8, or 3.3V) separate from AVDD voltages (2.8 or 3.3V) for maximum power reduction.

Jumpers

INT

Cut the INT jumper to remove the 47 kΩ pull-up resistor from the INT pin.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

I²C

The SparkFun Qwiic ToF Imager Sensor has two 2.2 kΩ pull-up resistors attached to the I²C bus by default. If multiple sensors are connected to the bus with the pull-up resistors enabled the parallel equivalent resistance may create too strong of a pull-up for the bus to operate correctly. As a general rule of thumb, disable all but one pair of pull-up resistors if multiple devices are connected to the bus. If you need to disconnect the pull-up resistors they can be removed by cutting the traces on the corresponding jumper highlighted below.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

PSU

This jumper is related to the pins specific to the 1" x 1" ToF board. By default, VDDIO and VDDA are tied together. Cutting the PSU jumper will isolate the power rails. A user must then provide separate VDDIO and VDDA supplies. This is most applicable for users who want to use IO voltages (1.8, 2.8, or 3.3V) separate from AVDD voltages (2.8 or 3.3V) for maximum power reduction.

LED

If minimal power consumption is a concern, or you just don't want that Power LED on the front of the board to light up, go ahead and cut this jumper.

Qwiic ToF Imager - VL53L5CX	Qwiic Mini ToF Imager - VL53L5CX

Board Outline

Qwiic ToF Imager - VL53L5CX

This sensor measures 1" x 1".

Qwiic Mini ToF Imager - VL53L5CX

This sensor measures 0.5" x 1".