Datasheet

Designing the VEML6070 UV Light Sensor
Into Applications
Application Note
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Vishay Semiconductors
APPLICATION NOTE
Revision: 26-Mar-18
8
Document Number: 84310
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The size of the window is simply calculated according to triangular rules. The dimensions of the device, as well as the sensitive
area, are shown within the datasheet. For best results, the distance below the window’s upper surface and the specified angle
below the given window diameter (w) are known.
Dimensions (L x W x H in mm): 2 x 2 x 0.85
Fig. 12 - Window Area for an Opening Angle of ± 55°
The calculation is then: tan α = x/d → with α = 55° and tan 55° 1.43 = x/d → x = 1.43 x d
Then the total width is w = 0.5 mm + 2 x x.
d = 0.5 mm → x = 0.72 mm → w = 0.5 mm + 1.44 mm = 1.94 mm
d = 1.0 mm → x = 1.43 mm → w = 0.5 mm + 2.86 mm = 3.36 mm
d = 1.5 mm → x = 2.15 mm → w = 0.5 mm + 4.30 mm = 4.80 mm
d = 2.0 mm → x = 2.86 mm → w = 0.5 mm + 5.72 mm = 6.22 mm
d = 2.5 mm → x = 3.58 mm → w = 0.5 mm + 7.16 mm = 7.66 mm
d = 3.0 mm → x = 4.29 mm → w = 0.5 mm + 8.58 mm = 9.08 mm
1
3 4
6
0.1
Pin 1 marking
0.28
d
w
.
α
D
0.5
x
Here in drawing, α = 55°
Dimensions in mm
tan 55° = 1.43 = x/d
x = 1.43 x d
0.85