ALS-PDIC15-21B Datasheet, PDF (7/11 Pages) Everlight Electronics Co., Ltd – Surface - Mount Ambient Light Sensor

Surface - Mount
Ambient Light Sensor
Converting Photocurrent to Voltage
Vcc
ALS-PDIC15-21B/TR8
Current
Amp
Iph
Vout
RL CL
GND
Note:
1. The output voltage (Vout) is the product of photocurrent (IPH) and loading resistor (RL)
2. A right loading resistor shall be chosen to meet the requirement of maximum ambient light,
and output saturation voltage:
≦ ＝ － Vout(max.) = Iout(max.) × RL Vout(saturation) Vcc 0.8V
3. To avoid 60Hz ripple from fluorescent lamps, we suggest that the time constant must be
greater than 0.5 second:
≧ RL × CL 0.5 (empirical data)
Everlight Electronics Co., Ltd.
Document No: DAS-015-007 Rev1.1
7
http:\\www.everlight.com
Aug. 14, 2008