VL6180 datasheet(33/73 Pages) STMICROELECTRONICS

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VL6180

Ranging specification

The light source used was a large, adjustable halogen ‘theatre’ lamp. The lamp was

mounted behind the device under test, pointing directly at the test chart, therefore the

ambient rate measured by VL6180 is from the light reflected off the test chart.

Table 16.shows upper and lower measurement limits based on characterization of both

typical and limit samples for a 17% target at 400 mm according to the conditions laid out in

Table 15. Testing was performed at 2.8 V and over the optimum operating temperature

range (-10°C to + 60°C).

The data shown in Table 17 is worst case maximum range data for reference only and

shows the light levels that can be achieved using a low cross-talk system as defined in

Section 3.2.1.

Table 15. Worst case max range vs. ambient >100mm

Target

reflectance (%)

Distance (mm)

Ambient Rate(1) (Mcps)

1. Ambient light level set at 23°C

Minimum Detection Rate(2)

(%)

2. Over the optimum operating temperature range (-10°C to + 60°C)

200

3.7

97.5

200

97.5

400

2.1

94.7

Table 16. Range limits for a 400 mm target @ ambient rate 2.1Mcps

Lower limit (mm)

Upper limit (mm)

330

470

Table 17. Worst case achievable light levels

Target reflectance

(%)

Distance (mm)

Equivalent Light

level on top of

glass (lux)

Notes

200

5,200

Sunlight

400

950

Halogen light source

200

3,700

Sunlight

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