Surface - Mount
Ambient Light Sensor
ALS-PDIC15-21B/TR8
Features
Monolithic IC containing photodiode and current amplifier
Human-eye spectral response and excellent IR-cut (from 700 to 1050 nm)
Wide dynamic range: 1 lux to 30,000 lux
Excellent output to illuminance linearity
Size: 3.2mm (L)*1.5mm (W)*1.1mm (H)
Very low (< 3%) photocurrent fluctuation versus temperature change (0 to 60
o
C)
Wild supply voltage range: 1.5V to 5.5V
Standby current: < 1 uA
Light to Current, analog output
Operating temperature performance, -30
o
C to 85
o
C
RoHS compliant and Pb Free package
‧
Detection of ambient light to control display backlighting
Mobile devices – Mobile phones, PDAs, GPS
Computing device – TFT LCD monitor for Notebook computer
Consumer device – TFT LCD TV, Plasma TV
Automatic residential and commercial management
Automatic contrast enhancement for electronic signboard
Ambient light monitoring device for daylight and artificial light
– Street light
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Description
The ALS-PDIC15-21B/TR8 is a compact surface mount photo-sensor IC for detecting ambient
light illuminating intensity. The sensitivity is superior to that of a phototransistor, and exhibits
little chip-to-chip variation. It has excellent spectral sensitivity to the illuminating light source
and excellent output linearity. Due to very low photo current fluctuation versus temperature
change, ALS-PDIC15-21B/TR8 is very suitable for hand-held or outdoor application device.
Applications
Everlight Electronics Co., Ltd.
Document No: DAS-015-007 Rev1.1
1
http:\\www.everlight.com
Aug. 14, 2008
Surface - Mount
Ambient Light Sensor
ALS-PDIC15-21B/TR8
Absolute Maximum Ratings
(Ta=25℃)
℃
Parameter
Supply Voltage
Output Voltage
Output Photo Current
Operating Temperature Range
Storage Temperature Range
Soldering Temperature Range
[Note1]
Human Body Model ESD
Machine Model ESD
Symbol
V
cc
V
o
I
PH
T
opr
T
stg
T
sol
HBM
MM
Rating
-0.5~7.0
0 ~ Vcc-0.9
0~5
-40 ~ +85
-40 ~ +100
260
3000
300
Unit
V
V
mA
℃
℃
℃
V
V
Note1:
For detail reflow time and the recommended temperature profile, please refer to page 8.
Recommended Operating Conditions (Ta=25℃)
℃
Parameter
Operating Temperature
Supply Voltage
Symbol
T
opr
V
cc
Min.
-40
1.5
Max.
+85
5.5
Unit
℃
V
Everlight Electronics Co., Ltd.
Document No: DAS-015-007 Rev1.1
3
http:\\www.everlight.com
Aug. 14, 2008
Surface - Mount
Ambient Light Sensor
ALS-PDIC15-21B/TR8
Electrical and Optical Characteristics (Ta=25℃)
℃
Parameter
Supply Current
Dark Current
Symbol Min.
I
cc
I
D
I
PH1
I
PH2
Light Current
I
PH3
I
PH4
Photocurrent Ratio
Saturation Output
Voltage
Peak Sensitivity
Wavelength
Switching
Time
Rise Time
Fall Time
Typ.
160
－
1.7
17
20
200
1.2
2.15
Max.
－
10
1.9
19
－
－
－
－
Unit
µA
nA
µA
µA
µA
µA
－
V
Test Condition
Ev = 1000 lux
E
v
= 0Lux
V
cc
=3V; E
v
=10Lux
[Note1] [Fig.2]
－
－
1.2
12
－
－
－
2.05
－
－
－
V
cc
=3V; E
v
= 100Lux
[Note1] [Fig.2]
V
cc
=3V; E
v
= 100Lux
[Note2] [Fig.2]
V
cc
=3V; E
v
=1000Lux
[Note1] [Fig.2]
I
PH3
/ I
PH2
V
o
λ
p
t
r
t
f
V
cc
=3V; E
v
= 100Lux,
R
L
=135K
[Fig.3]
580
0.1
0.5
－
1
2
nm
ms
ms
V
cc
=3V,R
L
=5K
[Fig.4]
Note:
1. White Fluorescent light (Color Temperature = 6500K) is used as light source. However, White LED is
substituted in mass production.
2. Illuminance by CIE standard illuminant-A / 2856K, incandescent lamp.
Everlight Electronics Co., Ltd.
Document No: DAS-015-007 Rev1.1
4
http:\\www.everlight.com
Aug. 14, 2008
Surface - Mount
Ambient Light Sensor
ALS-PDIC15-21B/TR8
Fig.1
Block Diagram
PDIC15-21B
2. V
out
2. Vcc
Current
Amp
1. V
cc
1. Vout
3. GND
3. GND
4. GND
4. GND
Fig.2
Measurement Method of
Light Current
Fig.3
Measurement Method of
Saturation Output Voltage
Vcc
Light
Source
Vcc
Light
Source
ALS-001
PDIC15-21B
L
GND
Fig.4
Switching Time Measurement Method
Everlight Electronics Co., Ltd.
Document No: DAS-015-007 Rev1.1
5
http:\\www.everlight.com
Aug. 14, 2008
L
I
R
CC
I
Vout
ALS-001
AS-3021
PDIC15-21B
Vout
GND
Embedded System
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