VL6180X datasheet(32/79 Pages) STMICROELECTRONICS

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Functional description

VL6180X

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DocID026171 Rev 6

2.13.5

Integration period

The integration period is the time over which a single ALS measurement is made. The

default integration period is 100ms. Integration times in the range 50-100 ms are

recommended to reduce impact of light flicker from artificial lighting.

2.13.6

ALS gain selection

Eight analog gain settings are available which can be selected manually depending on the

range and resolution required. Table 14.shows the actual characterized gains versus the

design targets. If a gain setting other than gain 20 is used, marginally greater accuracy can

be achieved by using the actual gain values in the light level equation in Section 2.13.4

when calculating the lux light level.

Table 14. Actual gain values

Note:

The upper nibble of SYSALS__ANALOGUE_GAIN should always be set to 0x4.

Analog gain setting

Actual gain values

0x46

1.01

0x45

1.25

1.28

0x44

1.67

1.72

0x43

2.5

2.60

0x42

5.21

0x41

10.32

0x40

0x47

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