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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
Features
• Close responsively to the human eye spectrum
• Light to Current, analog output
• Good output linearity across wide illumination range
• Low sensitivity variation across various light sources
• Operating temperature performance, -40oC to 85oC
• Wide supply voltage range, 1.8V to 5.5V
• Size : 1.6mm(L)*1.6mm(W)*0.55mm(H)
• RoHS compliant, Pb Free and halogen free package
• Compliance with EU REACH.
Description
The EAALSDIC2012A3 is consisting of a photodiode and a current amplification IC. Everlight Americas ALS series
product is a good effective solution to the power saving of display backlighting of mobile appliances, such as the
mobile phones, NB and PDAs. Due to the high rejection ratio of infrared radiation, the spectral response of the ambient
light sensor is close to that of human eyes.
Applications
• Detection of ambient light to control display backlighting
Mobile devices – mobile phones, PDAs
Computing device – TFT LCD monitor for Notebook computer
Consumer device – TFT LCD TV, plasma TV, video camera, digital camera, toys
• Automatic residential and commercial management
• Automatic contrast enhancement for electronic signboard
• Ambient light monitoring device for daylight and artificial light
– Street light, CCD/CCTV
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Top View
Package Dimensions
Note: Tolerances unless mentioned ±0.2mm. Unit = mm
Side View
Bottom View
Recommended Soldering Pattern
Light Receiving Area
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply Voltage
VCC
-0.5 ~ 6.0
V
Output Voltage
VO
0 ~ VCC-0.8
V
Output Photo Current
IPH
0 ~ 5
mA
Operating Temperature Range
Topr
-40 ~ +85
℃
Storage Temperature Range
Tstg
-40 ~ +100
℃
Soldering Temperature Range [Note1]
Tsol
260
℃
Note1: For detail reflow time and the recommended temperature profile, please refer to page 8.
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Operating Temperature
Topr
-40
+85
℃
Supply Voltage
VCC
1.8
5.5
V
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Electro-Optical Characteristics (Ta=25℃)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Supply Current
ICC
-----
480
950
μA
VCC=3V, EV=1000Lux
RL=1KΩ
Dark Current
ID
-----
-----
100
nA
VCC=3V, EV=0Lux
Light Current
IPH1
2.7
4
5.4
μA
VCC=3V, EV=10Lux
[Note1]
IPH2
27
40
54
μA
VCC=3V, EV=100Lux
[Note1]
IPH3
-----
48
92
μA
VCC=3V, EV=100Lux
[Note2]
IPH4
-----
400
540
μA
VCC=3V, EV=1000Lux
[Note1]
Photocurrent Ratio
IPH3/ IPH2
-----
1.2
1.7
-----
-----
Saturation Output Voltage
VO
2.20
2.35
-----
V
VCC=3V,EV=100Lux
RL=150KΩ [Fig.3]
Peak Sensitivity Wavelength
λP
-----
550
-----
nm
-----
Switching Time
Rise Time
tr
-----
11
1000
μs
VCC=3V,EV=1000Lux
RL=5KΩ [Fig.4]
Fall Time
tf
-----
400
2000
μs
Delay Time
td
-----
250
-----
μs
Storage Time
ts
-----
35
-----
μs
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.
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Fig.1 Block Diagram
Fig.2 Measurement Method of Light Current
Fig.3 Measurement Method of Saturation Output Voltage
ALS-001
Light
Source
GND
Vout
IL
Vcc
ICC
ALS-001
Light
Source
GND
Vout
Vcc
RL
Fig.4 Switching Time Measurement Method
EAALSDIC2012A3
EAALSDIC2012A3
EAALSDIC2012A3
EAALSDIC2012A3
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Typical Electro-Optical Characteristics Curves
Fig 5. Light Output vs. Illuminance
Fig 6. Dark Current vs. Temperture
Fig 7. Light current vs. Temperature
Fig 8. Light current vs. Supply Voltage
-60 -40 -20 0 20 40 60 80 100
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0 VCE = 3V
EV = 100 Lux
Relative light current
Temperature (¢J)
Fig 9. Spectral Response
Fig 10. Output Voltage vs. Illuminance
110 100 1000 10000
0.1
1
10
100
1000
10000
Fluorescent light
Incandescent lamp
Light current (uA)
Illuminance (Lux)
2 3 4 5 6 7
0.0
0.4
0.8
1.2
1.6
Ta = 25¢J
Relative light current
Supply voltage (V)
110 100 1000 10000
1E-3
0.01
0.1
1
10
Incandescent lamp RL = 100 k£[
Fluorescent light RL = 100 k£[
Incandescent lamp RL = 30 k£[
Fluorescent light RL = 30 k£[
Incandescent lamp RL = 5.1 k£[
Fluorescent light RL = 5.1 k£[
Vcc = 3V
Ta = 25¢J
Output voltage (V)
Illuminance (Lux)
(Typ.)
(Typ.)
(Typ.)
(Typ.)
(Typ.)
EAALSDIC2012A3
Human Eye
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Fig.11 Consumption current vs. Illuminance
Fig.12 Relative consumption current vs. Temperature
Converting Photocurrent to Voltage
RL
GND
Vout
Vcc
Amp
Current
CL
Iph
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)
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Recommended method of storage
1. Do not open moisture proof bag before devices are ready to use.
2. Shelf life in sealed bag from the bag seal date:
18 months at 10°C~30°C and < 90% RH.
3. After opening the package, the devices must be stored at 10°C~30°C and ≦ 60%RH, and used within 1 year
(floor life).
4. If the moisture absorbent material (desiccant material) has faded or unopened bag has exceeded the shelf life or
devices (out of bag) have exceeded the floor life, baking treatment is required.
5. If baking is required, refer to IPC/JEDEC J-STD-033 for bake procedure or recommend the following conditions:
192 hours at 40°C +5/–0°C and < 5 % RH (reeled/tubed/loose units) or
96 hours at 60°C ± 5°C and < 5 % RH (reeled/tubed/loose units) or
24 hours at 125°C ± 5°C, not suitable for reel or tubes.
Recommended Solder Profile
Notice: (1) Reflow soldering should not be done more than two times.
(2) When soldering, do not put stress on the devices during heating.
(3) After soldering, do not warp the circuit board.
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Soldering Iron
Each terminal is to go to the tip of soldering iron temperature less than 350℃ for 3 seconds within once in less than the
soldering iron capacity 25W. Leave two seconds and more intervals, and do soldering of each terminal. Be careful
because the damage of the product is often started at the time of the hand solder.
Repairing
Repair should not be done after the device have been soldered. When repairing is unavoidable, a double-head
soldering iron should be used (as below figure). It should be confirmed beforehand whether the characteristics of the
device will or will not be damaged by repairing.
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
10
Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
www.everlightamericas.com
Package Quantity Specification
4000 PCS/ 1 Reel
Label Format
‧CPN: Customer’s Product Number
‧P/N: Product Number
‧QTY: Packing Quantity
‧CAT: Luminous Intensity Rank
‧HUE: Dom. Wavelength Rank
‧REF: Forward Voltage Rank
‧LOT No: Lot Number
‧MADE IN TAIWAN: Production Place
Reel Dimensions
Note: Tolerances unless mentioned ±0.1mm. Unit = mm
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
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Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
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Tape Dimensions
Unit: mm
Progressive direction
Unit: mm
Tolerance: ±0.1mm
DATASHEET
I2C Digital Ambient Light Sensor – Surface Mount
EAALSDIC2012A3
12
Copyright © 2010, Everlight Americas Inc. All Rights Reserved. Release Date : 03.10.2014. Issue No: 1
www.everlightamericas.com
Note:
1. Above specification may be changed without notice. Everlight Americas will reserve authority on material change for above
specification.
2. When using this product, please observe the absolute maximum ratings and the instructions for using outlined in these specification
sheets. Everlight Americas assumes no responsibility for any damage resulting from use of the product which does not comply with
the absolute maximum ratings and the instructions included in these specification sheets.
3. These specification sheets include materials protected under copyright of Everlight Americas Inc. Please don’t reproduce or cause
anyone to reproduce them without Everlight Americas’s consent.
