ALS-PDIC17-79NB-TR8 Datasheet, PDF (16/21 Pages) Everlight Electronics Co., Ltd – I2 Digital Ambient Light Sensor

Surface - Mount
I²C Digital Ambient Light Sensor
ALS-PDIC17-79NB/TR8
Optical window dimensions
In order to prevent ALS performance being affected by improper window design, some constrains on
the dimensions and design of the window is as an example shown below,
D₂
=
tan(
D₁
90 ° − ^θ
×2
)
2
X
=
(D₃ + D₁)
tan( 90 ° − ^θ
)
×
2
2
θ: View Angle
D₁ : Distance between ALS and Windows
D₂ : Window’s Size
D₃ : Distance between light source and window
X : Detection Width
Everlight Electronics Co., Ltd.
Document No: DLS-xxxxxxx Rev1
16
http://www.everlight.com
Oct. 12, 2010