Datasheet

Designing the VEML6070 UV Light Sensor
Into Applications
Application Note
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APPLICATION NOTE
Revision: 26-Mar-18
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Document Number: 84310
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A smaller window will also be sufficient, although it will reduce the total sensitivity of the sensor.
Dimensions (L x W x H in mm): 2 x 2 x 0.85
Fig. 13 - Window Area for an Opening Angle of ± 40°
The calculation is then: tan α = x/d → with α = 40° and tan 40° 0.84 = x/d → x = 0.84 x d
Then the total width is w = 0.5 mm + 2 x x.
d = 0.5 mm → x = 0.42 mm → w = 0.5 mm + 0.84 mm = 1.34 mm
d = 1.0 mm → x = 0.84 mm → w = 0.5 mm + 1.68 mm = 2.18 mm
d = 1.5 mm → x = 1.28 mm → w = 0.5 mm + 2.56 mm = 3.06 mm
d = 2.0 mm → x = 1.68 mm → w = 0.5 mm + 3.36 mm = 3.86 mm
d = 2.5 mm → x = 2.10 mm → w = 0.5 mm + 4.20 mm = 4.70 mm
d = 3.0 mm → x = 2.52 mm → w = 0.5 mm + 5.04 mm = 5.54 mm
1
3 4
6
0.1
Pin 1 marking
0.28
d
w
.
α
D
0.85
0.5
x
Here in drawing, α = 40°
Dimensions in mm
tan 40° = 0.84 = x/d
x = 0.84 x d