Ultra-small Ambient Light Sensor, Linear Current Output, 2-Stage Gain Switching, using the LA0151CS

AND9239/D
Ultra-small Ambient Light Sensor
Linear Current Output,
2-Stage Gain Switching
using the LA0151CS
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APPLICATION NOTE
Overview
The LA0151CS is a photo IC for micro-sized ambient light sensor. It
enables to be mounted on a very small limited space such as on the cell
phones which is becoming small and thinner and on other mobile
applications. It is suitable for application like mobile phone, tablet PC,
digital still camera and camcorder.
Features
 Smallest ODCSP package in the world
(1.01mm  1.01mm, thickness : 0.6mm)
 Low gain mode function (Low gain -38dB)
 Low power consumption (150A at 1,000Lux)
 Low dark current (Max current 0.1A)
 No sensibility in infrared area
 Less difference in sensibility depending on the type of light source
(Fluorescent/Incandescent:1.0/1.1)
 Linear current output
 Wide dynamic range (1 to 100,000Lux)
 Halogen free compliant
ODCSP4 1.01x1.01
Package Dimensions
Pin Assignment
unit : mm
<Bottom View>
<Top View>
1
4
4
1
2
3
3
2
No.
Name
Function
1
VCC
Power supply
2
SW
Gain change
3
GND
Ground
4
OUT
Output
Ball Pitch : 0.5mm , Ball Size : 0.18mm

© Semiconductor Components Industries, LLC, 2015
July 2015 - Rev. 0
1
Publication Order Number :
AND9239/D
AND9239
Pad Layout (Photos)
This is a pin 1 mark which is located
in the middle of the backside of
package.
Photo diode: Only this part looks dark.
Recommended Land Pattern
unit : m
Land ( pink ) : 300m square
Solder resist opening (green ) : 400m square
Block Diagram
VCC
Current
Amp.
OUT
1
4
2
SW
GND
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Chip Pattern and Photo-receiving Pattern Diagrams
Chip Pattern diagram (Top View)
Photo-receiving Pattern Enlarged Diagram (effective area)
162
15
17
69
80.5
223
1010
249.5
10
105
80.5
105
1010
249.5
Unit : m
Unit : m
∗ Pin 1 is on the upper left.
ODCSP Cross Section Structure
Optical Device Chip Size Package
ON Semiconductor original wafer level package for optical device.
Glass
Glue
(Contact pad)
Photodiode
Si
Insulator
PKG edge
Passivation
Redistribution layer
Solder Ball
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AND9239
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS at Ta=25°C (Note 1)
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC
6
V
Operating temperature
Topr
-30 to 85
C
Tstg
-40 to 100
C
Storage temperature
1. Stresses exceeding those listed in the Absolute Maximum Rating table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
RECOMMENED OPERATING CONDITIONS AND OPERATING VOLTAGE RANGE at Ta=25 °C (Note 2)
Parameter
Symbol
Recommended supply voltage
VCC
SW pin low voltage
Vl
Conditions
min
typ
2.2
Normal gain mode
max
3.3
0
Unit
5.5
V
0.4
V
Vh
Low gain mode
1.4
VCC
V
SW pin high voltage
2. Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the
Recommended Operating Ranges limits may affect device reliability.
ELECTRICAL AND OPTICAL CHARACTERISTICS at VCC=3.3V, Ta=25 °C (Note 3)
Parameter
Symbol
Conditions
min
typ
max
Unit
210
A
Ev=0 lux
0.1
A
Isl2
Ev=1000 lux
0.3
A
Output current (1) (Note 4,6)
IO1
Ev=100 lux
6
8
10
A
Output current (2) (Note 4,6)
IO2
Ev=1000 lux
60
80
100
A
Dark current (Note 6)
Ileak
Ev=0 lux
0.1
A
Temperature coefficient (Note 5)
Itc
Ev=100 lx, Ta=-20 to 60C
Rise time (1) (Note 7)
Tr1
Ev=1000 lux, RL=5kΩ
15
40
s
Fall time (1) (Note 7)
Tf1
Ev=1000 lux, RL=5kΩ
150
500
s
Peak sensitivity wave length (Note 5)
λp
Saturation output voltage (Note 4,6)
VO
Current dissipation (Note 4,6)
ICC
Ev=1000 lux, RL=5kΩ
Sleep current (1) (Note 6)
Isl1
Sleep current (2) (Note 6)
RL=150kΩ, Ev=1000 lx
90
150
% / C
0.34
3.0
550
nm
3.2
V
3. Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may
not be indicated by the Electrical Characteristics if operated under different conditions.
4. Measured with the standard light source A. White LED is used instead in the mass production line.
5. Design guaranteed item
6. Test circuit for measuring current dissipation and output current
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AND9239
7. Measuring method of rise time (Tr) and fall time (Tf)
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AND9239
Typical Performance Characteristics
Output current - Illuminance
1000
Output current[ A]
100
10
1
0.1
0.01
1
10
100
1000
10000
Illuminance Ev [lx]
Consumption current - Illuminance
Consumption current[ A]
1000
100
10
1
10
100
1000
Illuminance Ev [lx]
10000
Ileak - Ambient temperature
1.E+00
1.E-01
Ileak[ A]
1.E-02
1.E-03
1.E-04
1.E-05
1.E-06
-60
-40
-20
0
20
40
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60
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AND9239
Relative output current - Vcc (@1000lx)
Relative output current
1.4
1.2
1
0.8
0.6
0.4
0.2
0
2
3
4
5
6
Supply Voltage Vcc[V]
Relative consumption current - Vcc (@1000lx)
Relative consumption current
1.2
1
0.8
0.6
0.4
0.2
0
2
3
4
5
6
Supply Voltage Vcc[V]
Relative output current - Ambient temperature
1.4
Relative current
1.2
1
0.8
0.6
0.4
0.2
0
-60
-40
-20
0
20
40
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60
80
100
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AND9239
Output Voltage - Illuminance (Vcc=3.3V ,RL=15K)
10
Output Voltage[V]
1
0.1
0.01
0.001
1
10
100
1000
10000
100000
Illuminance Ev[lx]
Relative Spectral Responsivity
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
200
400
600
800
1000
lambda[nm]
Directional Sensitivity : Normal Gain @1000lx
1.2
Directional Sensitivity
Relative Spectral Sensitivity
1
1
0.8
0.6
0.4
0.2
0
-90
-60
-30
0
degree[°]
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30
60
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AND9239
Sample Application Circuit
CPU A/D input port
VCC
OUT
SW
GND
Power supply
CPU Output port
•
•
•
You can regulate the output voltage of the light sensitivity by an output resistance value. Please adjust
it by application.
Vout = (80A at 1000lx, Normal mode)*EV*Rl
You can compose LPF by connecting capacity to the output. This is to reduce the 50/60Hz noise of the
AC power.
Cl = 1 / (2 π fc Rl)
It is not necessary to place power supply capacity near an IC.
The power supply capacity recommends from 0.01F to 0.1F.
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AND9239
Pin Functions
Pin No.
1
Pin Name
VCC
Pin function
Equivalent Circuit
Power supply terminal.
Insert a capacitor between this pin and
ground to prevent the influence of noise,
etc.
2
SW
Gain change terminal.
This pin is used for gain change.
When this pin is low, "Normal gain".
When this pin is high, "Low gain" .
3
GND
4
OUT
Ground terminal.
Output terminal.
This pin is outputted the linear current
depending on ambient light.
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AND9239
Relative Output Current vs Distance
• Measuring method
hole sizeΦ
Illumination Sensor
standard light A
metal sheet
Thickness 0.4mm
distance S
• Evaluation result
• Recommended condition
Hole size φ (optical window) = more than 2mm.
Distance from sensor to optical window = less than 2mm.
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AND9239
Light Source Dependency
*Fluorescent light is set to “1”
Dynamic Current Range
LA0151CS
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Dynamic Voltage Range
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Differential Light Sensibility by PD Location
< Side view >
light
2.0
Sensor window
Plastic (black : transmission factor=0)
1.8
1.0
0.4
Board (glass epoxy)
unit : mm
IC
< Top view >
A
IC
B
C
D
E
Sensor window PD
A : PD is arranged at the center of the sensor window.
Bto E : The position of PD was rotated.
PD location A is set to “1”
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AND9239
Window design guide
Flat window lens design
A window lens will surely limit the viewing angle of the LA0151CS. The window lens should be placed directly on top of
the LA0151CS. The thickness of the lens should be kept at minimum to minimize loss of power due to reflection and also
to minimize loss of loss due to absorption of energy in the plastic material. A thickness of T = 1 mm is recommended for
a window lens design.
Window with light pipe design
If a smaller window is desired while maintaining a wide effective viewing angle of the LA0151CS, a cylindrical piece of
transparent plastic is needed to trap the light and then focus and guide the light on to the LA0151CS. Hence the name light
guide or also known as light pipe. The pipe should be placed directly on top of the LA0151CS with a distance of Z =
0.5mm to achieve peak performance. The light pipe should have minimum of 1.5mm in diameter to ensure that whole area
of the sensor will be exposed.
WD
(T+L+Z)
1.5
2.0
2.5
3.0
FLAT WINDOW LENS
(L=0.0)
Z
0.5
1.0
1.5
2
D1
2.0
3.0
4.0
5.0
WINDOW WITH LIGHT PIPE
(D2=1.5, Z=0.5)
D1
L
2.5
1.5
*All dimensions are in mm.
*These dimensions are based on a window lens thickness of 1.0mm and a refractive index of 1.59.
WD: Distance between window front panel and LA0151CS
D1: Window diameter, T: Thickness, L: Length of light pipe
D2: Light pipe diameter, Z: Distance between window rear panel and LA0151CS
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AND9239
Evaluation Board Manual
<Evaluation Board>
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Test Procedure:
1.
2.
3.
4.
5.
6.
Connect the test setup as shown above.
Connect IC power supply (2.2V to 5.5V) between VCC and GND.
Connect multimeter between OUT and GND.
Irradiate a light, and put on the illuminance meter near the IC.
Control the light source and to be adjusted 500 lux.
Then , OUT terminal of LA0151CS is outputted roughly 40A. Therefore, multimeter is showed roughly
1.32V. (1.32V = 40A×33kΩ)
LA0151CS features:
• No sensibility in infrared area.
• Less difference in sensibility depending on the type of light source.
(Please see to page 11 “Light Source Dependency”.)
Evaluation Board Circuit Diagram
VCC
OUT
GND
LA0151CS
SW
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AND9239
Bill of Materials for LA0151CS Evaluation Board
Designator
Quantity
IC1
1
R1
1
C1
1
Description
Ambient
Light
Sensor
OUT
(to GND)
VCC
Bypass
Capacitor
Value
Tolerance
33k
(0.063W)
-
0.1uF
/16V
Footprint
ODCSP4
(0.5mm ,pitch)
1005
(0402Inch)
±5%
±10%
Manufacturer Part
Number
Substitution
Allowed
Lead
Free
ON
Semiconductor
LA0151CS
No
yes
ROHM
MCR01MZPJ333
yes
yes
MURATA
GRM155B11C104KA
yes
yes
Manufacturer
1005
(0402Inch)
Evaluation Board PCB Design
(Top View )
IC1
R1
C1
Allowable power consumption Pdmax (mW)
( Pattern )
( Resist )
( Silk )
200
Specified circuit board
6×10×0.5tmm
One layer glass epoxy
125
100
25
0
-30
0
30
60
Pdmax - Ta
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90
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AND9239
Packing Specification of Embossed Carrier Taping
ODCSP4 (1.01X1.01)
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Lineup of Ambient Light Sensor
Product name
LA0151CS
LA0152CS
LV0111CF
LV0104CS
Output type
Linear current
Linear current
Logarithm current
16bitAD digital
Overall size(mm)
1.01×1.01×0.6
1.01×1.01×0.6
1.08×1.08×0.6
1.08×1.08×0.6
Spectral characteristics
Normal
Normal
Closer to visibility
Closer to visibility
Gain switching
○
―
―
Standby function
―
○
○
○
○
Operating voltage (V)
2.2 to 5.5
2.2 to 5.5
2.3 to 5.5
2.3 to 3.6
Operating temperature range
(°C)
30 to 85
30 to 85
30 to 85
30 to 85
Consumption current 1000 lx
150uA
150uA
75uA
70uA
Output current 100 lx
8uA
8uA
20uA
100 counts
Output current 1000 lx
80uA
80uA
30uA
1000 counts
Peak sensitivity (nm)
550
550
550
550
D range
1 to 100k lx
1 to 100k lx
1 to 100k lx
1 to 65k lx
Pb free
Halogen free
○
○
○
○
○
○
○
○
Status
Mass production
Mass production
Mass production
Mass production
LV0111CF/LV0104CS
LV0101CF / LV0104CS
1
1
0.9
0.9
0.8
0.8
R ela tiv e s ens itiv ity
R ela tiv e s en s itiv ity
LA0151CS/LA0152CS
LA0151CS / LA0152CS
0.7
0.6
0.5
0.4
0.3
0.7
0.6
0.5
0.4
0.3
0.2
0.2
0.1
0.1
0
0
300
400
500
600
LA0151/52CS
700
800
900
1000
300
400
500
600
LV0101CF/04CS
Human eye
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700
800
Human eye
900
1000
AND9239
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nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including
without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can
and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
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