Datasheet

Designing the VEML6070 UV Light Sensor
Into Applications
Application Note
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Vishay Semiconductors
APPLICATION NOTE
Revision: 26-Mar-18
7
Document Number: 84310
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For optimal performance, the window size should be large enough to maximize the light irradiating the sensor. In calculating the
window size, the only dimensions that the design engineer needs to consider are the distance from the top surface of the sensor
to the outside surface of the window and the size of the window. These dimensions will determine the size of the detection zone.
First, the center of the sensor and center of the window should be aligned. The VEML6070 has an angle of half sensitivity of
about ± 55°, as shown in the figure below.
Fig. 9 - Relative Radiant Sensitivity vs. Angular Displacement Fig. 10 - Angle of Half Sensitivity: Cone
Fig. 11 - Window Above Sensitive Area
Remark:
This wide angle and the placement of the sensor as close as possible to the cover is needed to show good responsivity.
10
100
1000
10000
Axis Title
1st line
2nd line
2nd line
Light Transmission (%)
λ - Wavelength (nm)
2nd line
0° 20°
40°
60°
80°
0.6
0.7
0.8
0.9
1.0
00.10.20.30.40.5
S
rel
- Relative Sensitivity
ϕ - Angular Displacement