5.4

Ranging accuracy

Ranging accuracy is defined as follows:

The ranging accuracy is a direct evaluation of the measurement, including offset errors and output noise.

At least 94 % of the ranging values are within the declared ranges. This quality indicator includes measure-to-

measure and part-to-part dispersion.

Target reflectance level, full FoV

Distance (mm)

Indoor (no infrared)

Outdoor overcast

White target (88 %)

25-90

±10 mm

±10 mm

90-110

±5 %

±9 %

>110

±2.5 %

±7 %

Light gray target (54.5 %)

25-90

±9 mm

±9 mm

90-110

±5 %

±7 %

>110

±3 %

±8 %

Gray target (17 %)

25-90

±7 mm

±7 mm

90-110

±5 %

±8 %

>110

±5 %

±10 %

Measurement conditions:

•

Offset correction made at 10 cm from sensor

•

Indoor: no infrared

•

Outdoor: eq. 5 kLux equivalent sunlight (10 kcps/SPAD)

•

Nominal voltage (2v8) and temperature (23 °C)

•

All distances are for a complete FoV covered

•

Measurement is made on typical device bare modules

5.5

Ranging drift with temperature

When the temperature increases, the ranging value is affected by an offset of 1.3 mm per degree Celsius change.

This value is an offset and not a gain, and it does not depend on the target distance.

The VL53L3CX device embeds a feature that allows the temperature variation effect to be compensated, while

ranging.

When the ranging is started, the self-calibration is performed once and this allows to remove the ranging drift.

In order to get the best accuracy performances, it is recommended to perform a self-calibration when temperature

varies. This operation is realized calling in sequence the functions “stop” and “start”.

VL53L3CX

Ranging accuracy

DS13204 - Rev 2

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