ALS-PDIC15-21C_10 Datasheet, PDF (8/13 Pages) Everlight Electronics Co., Ltd – Surface-Mount Ambient Light Sensor

Surface-Mount
Ambient Light Sensor
Converting Photocurrent to Voltage
Vcc
ALS-PDIC15-21C/L230/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: DLS-0000009 Rev 4
8
http://www.everlight.com
December 7, 2010