Datasheet

Designing the VEML6070 UV Light Sensor
Into Applications
Application Note
www.vishay.com
Vishay Semiconductors
APPLICATION NOTE
Revision: 26-Mar-18
6
Document Number: 84310
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WHAT VALUES MAY BE SEEN WITH THE VEML6070?
If no exact UV light source is available to check the performance of the VEML6070, and only “normal” daylight is being used to
study the VEML6070’s response, please note that the UV power is dependent on the time of day, season, and location where
the measurements will be performed. During the winter, the total skin-affecting irradiance may be so low that even within full
sunshine no remarkable values will be seen.
Fig. 7 - Skin Affecting Irradiance Level vs. Time Seen at the Beginning of the Four Seasons
MECHANICAL CONSIDERATIONS AND WINDOW CALCULATIONS FOR THE VEML6070
The UV sensor will be placed behind a window or cover. The window material should not only be completely transmissive to
visible light (400 nm to 700 nm), but also at least to UVA wavelengths of 320 nm to 400 nm.
Fig. 8 - Light Transmission of ACRYLITE OP-4 Sheet
(www.aetnaplastics.com/site_media/media/documents/Acrylite_OP-4_Material_Data_Sheet.pdf
)
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Skin-Affective Irradiance (mW/m
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20181614121086
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Light Transmission (%)
λ - Wavelength (nm)
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340 380
0.100" thick
0.125" thick
0.150" thick
0.170" thick
0.187" thick
0.220" thick