DATASHEET

ISL29102
®
Data Sheet
July 15, 2010
Low Power Ambient Light-to-Voltage
Non-Linear Converter
Features
• Square Root Voltage Output
The ISL29102 is a low cost light-to-voltage silicon optical
sensor combining a photodiode array, a non-linear current
amplifier and a micro-power op amp on a single monolithic
IC. Similar to human eyes, the photodiode array has peak
sensitivity at 550nm and spans from 400nm to 600nm,
rejecting UV light and IR light. The input luminance range is
from 0.3 lux to 10,000 lux.
The integrated non-linear current amplifier boosts and
converts the photodiode signal in a square root fashion,
extending the light input dynamic range while maintaining
excellent sensitivity at dim conditions with low lux levels. The
device consumes minimal power over a wide range of
ambient lux levels because the current consumption ramps
at a square root fashion. A dark current compensation circuit
minimizes the effect of temperature dependent leakage
currents in the absence of light, improving the light sensitivity
at low lux levels while maintaining excellent sensitivity at low
lux levels. The built-in 1µA op amp gives the ISL29102 an
output voltage driving advantage for heavier loads.
The ISL29102 is housed in an ultra compact 2mmx2.1mm
ODFN plastic case surface mount package. Operation is
rated from -40°C to +85°C.
Ordering Information
PART NUMBER
(Notes 2, 3)
PACKAGE
(Pb-Free)
ISL29102IROZ-T7 (Note 1)
6 Ld ODFN
(Tape and Reel)
ISL29102IROZ-EVALZ
Evaluation Board
FN6483.1
PKG.
DWG. #
L6.2x2.1
• 0.3 lux to 10,000 lux Range
• 1.8V to 3.3V Supply Range
• Close to Human Eye Spectral Response
• Fast Response Time
• Internal Temperature Compensation
• Good IR Rejection
• Low Supply Current
• Operating Temperature Range -40°C to +85°C
• 6 Ld ODFN: 2mmx2.1mmx0.7mm
• Pb-Free (RoHS Compliant)
Applications
• Display and keypad dimming for:
- Mobile devices: smart phone, PDA, GPS
- Computing devices: notebook PC, webpod
- Consumer devices: LCD-TV, digital picture frame, digital
camera
• Industrial and medical light sensing
Related Literature
• See AN1422, “Light Sensor Applications”
Simplified Block Diagram
VDD
1
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special
Pb-free material sets; molding compounds/die attach materials
and NiPdAu plate - e4 termination finish, which is RoHS
compliant and compatible with both SnPb and Pb-free soldering
operations. Intersil Pb-free products are MSL classified at Pbfree peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device
information page for ISL29102. For more information on MSL
please see techbrief TB363.
1
LIGHT DATA
PROCESS
GND
2
CURRENT
AMPLIFIER
+
VOUT
6
OUTPUT CURRENT α √LIGHT INTENSITY
PHOTODIODE
ARRAY
4 REXT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2008, 2010. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
ISL29102
Pinout
ISL29102
(6 LD ODFN)
TOP VIEW
VDD 1
GND 2
6 VOUT
PD
NC 3
5 NC
4 REXT
Pin Descriptions
PIN NUMBER
PIN NAME
1
VDD
Supply (1.8V to 3.3V).
2
GND
Ground
3
NC
4
REXT
5
NC
6
VOUT
-
PD
2
PIN DESCRIPTION
No connect
Connected to an external resistor to GND setting the light-to-voltage scaling constant.
No connect
Voltage Output.
Thermal Pad. Thermal pad can be connected to GND or electrically isolated.
FN6483.1
July 15, 2010
ISL29102
Absolute Maximum Ratings (TA = +25°C)
Thermal Information
Supply Voltage Between VDD and GND . . . . . . . . . . . . . . . . . . 3.6V
REXT . . . . . . . . . . . . . . . . . . . . . . . . (-0.5V + GND) to (0.5V + VDD)
VOUT . . . . . . . . . . . . . . . . . . . . . . . . (-0.5V + GND) to (0.5V + VDD)
VOUT Short Circuit Current . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V
Thermal Resistance (Typical)
θJA (°C/W)
6 Lead ODFN (Note 4) . . . . . . . . . . . . . . . . . . . . . . .
88
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +90°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/data/tb/TB477.pdf
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTE:
4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
VDD = 3V, TA = +25°C, REXT = 100kΩ, no load at VOUT, green LED light, unless otherwise specified.
PARAMETER
E
DESCRIPTION
CONDITION
Range of Input Light Intensity for Square Root
Relationship to be Held
VDD
Operating Supply Voltage
IDD
Supply Current
1.8
µA
E = 1,000 lux
10
VDARK
Voltage Output in the absence of light
E = 0 lux, REXT = 10MΩ
ΔVOUT
Output Voltage Variation Over Three Light
Sources: Fluorescent, Incandescent and
Halogen
PSRR
Power Supply Rejection Ratio
tF
tD
tS
Fall Time
Delay Time for Rising Edge
Delay Time for Falling Edge
V
3.5
E = 1000 lux
Rise Time
3.3
E = 100 lux
Light-to-Voltage Accuracy
Maximum Output Voltage Swing
Lux
µA
VOUT1
VO-MAX
UNIT
0.65
E = 100 lux
Maximum Output Compliance Voltage at 95% of
Nominal Output
MAX
E = 0 lux
Light-to-Voltage Accuracy
VO-CMPL
TYP
0.3 - 10k
VOUT0
tR
MIN
E = 100 lux, VDD = 1.8V to 3.6V
15
0.185
0.460
µA
V
0.580
0.680
V
20
50
mV
10
%
2.5
mV/V
VDD - 0.7V
V
VDD
V
E = 0 lux to 300 lux
68
µs
E = 0 lux to 1000 lux
68
µs
E = 300 lux to 0 lux
1830
µs
E = 1000 lux to 0 lux
970
us
E = 0 lux to 300 lux
352
µs
E = 0 lux to 1000 lux
145
µs
E = 300 lux to 0 lux
22
µs
E = 1000 lux to 0 lux
22
µs
ISC
Short Circuit Current of Op Amp
±11
mA
SR
Slew Rate of Op Amp
±10
V/ms
Offset Voltage of Op Amp
±1.2
mV
VOS
3
FN6483.1
July 15, 2010
ISL29102
POWER SUPPLY
OR
SOURCE METER
INPUT
LIGHT
VDD
10%
ISL29102
FUNCTION
GENERATOR
90%
tR
tS
tF%
90%
VOUT
10%
OUTPUT
REXT
tD
FIGURE 2. TIMING DIAGRAM
FIGURE 1. TEST CIRCUIT FOR RISE/FALL TIME
MEASUREMENT
Typical Performance Curves
1.2
HUMAN EYE RESPONSE
NORMALIZED LIGHT INTENSITY
NORMALIZED RESPONSE
1.2
1.0
0.8
0.6
LIGHT SENSOR RESPONSE
0.4
0.2
0.0
-0.2
300
400
600
800
1.0k
1.0
SUN
0.8
HALOGEN
0.6
INCANDESCENT
FLUORESCENT
0.4
0.2
0
300
1.1k
400
500
600
700
800
900
1000
1100
WAVELENGTH (nm)
WAVELENGTH (nm)
FIGURE 4. SPECTRUM OF LIGHT SOURCES
FIGURE 3. SPECTRAL RESPONSE
RADIATION PATTERN
LUMINOSITY
30°
ANGLE 40°
20°
10°
0°
10°
20°
30°
40°
50°
50°
60°
60°
70°
70°
80°
90°
80°
0.2 0.4
0.6 0.8
RELATIVE SENSITIVITY
90°
1.0
FIGURE 5. RADIATION PATTERN
4
FN6483.1
July 15, 2010
ISL29102
Typical Performance Curves (Continued)
0.7
4.000
VDD = 3V
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
0.400
0.040
FLUORESCENT
0.004
VDD = 3V
0.6
HALOGEN
REXT = 40kΩ
INCANDESCENT
REXT = 100kΩ
HALOGEN
0.5
0.4
0.3
0.2
FLUORESCENT
INCANDESCENT
0.1
4x10-4
0.1
1
10
100
1000
0.0
10000
0
100 200 300 400 500 600 700 800 900 1000
LIGHT INTENSITY (Lux)
LIGHT INTENSITY (LUX)
FIGURE 7. OUTPUT VOLTAGE vs LIGHT INTENSITY
FIGURE 6. OUTPUT VOLTAGE vs LIGHT INTENSITY
0.8
1.8
VDD = 3V
1.6
REXT = 1MΩ
1.4
1.2
1.0
0.8
FLUORESCENT
0.6
INCANDESCENT
0.4
REXT = 1MΩ
0.6
HALOGEN
0.5
0.4
0.3
0.2
FLUORESCENT
INCANDESCENT
0.1
0.2
0
VDD = 3V
0.7
HALOGEN
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.0
0
10
20
30
40
50
60
70
80
90
0
100
0
1
2
LIGHT INTENSITY (LUX)
6
7
8
9
10
FIGURE 9. OUTPUT VOLTAGE vs LIGHT INTENSITY
0.30
1000.00
0.25
100.00
OUTPUT VOLTAGE (V)
DELAY TIME BEFORE RISING
10.00
1.00
RISE TIME
0.1
10
100
1000
LUX CHANGE FROM/TO 0 LUX (LUX)
FIGURE 10. TRANSIENT TIME vs LUX CHANGE FROM/TO
0 LUX
5
0.025
REXT = 10MΩ
0.20
0.15
0.10
0.005
0.05
0.00
DELAY TIME BEFORE FALLING
1
VDD = 3V
-0.05
0.000
-50 -40 -30 -20 -10 0
EQUIVALENT INPUT LIGHT (LUX)
FALL TIME
TRANSIENT TIME (ms)
5
LIGHT INTENSITY (LUX)
FIGURE 8. OUTPUT VOLTAGE vs LIGHT INTENSITY
0.01
4
3
10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
FIGURE 11. OUTPUT VOLTAGE vs TEMPERATURE AT 0 LUX
FN6483.1
July 15, 2010
ISL29102
Typical Performance Curves (Continued)
1.20
1.10
NORMALIZED OUTPUT VOLTAGE
VDD = 3V
SUPPLY CURRENT (µA)
REXT = 10MΩ
1.00
NO LOAD
0.90
0.80
1000 Lux
1.00
300 Lux
0.95
0.90
0.85
1.010
VDD = 3V
FLUORESCENT LIGHT
1000 Lux
7
9
5
300 Lux
3
REXT = 100kΩ
NO LOAD
1
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
NORMALIZED OUTPUT VOLTAGE
SUPPLY CURRENT (µA)
1.05
FIGURE 13. NORMALIZED OUTPUT VOLTAGE vs
TEMPERATURE
13
11
1.10
0.80
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
FIGURE 12. SUPPLY CURRENT vs TEMPERATURE AT 0 LUX
VDD = 3V
FLUORESCENT LIGHT
1.15
FLUORESCENT LIGHT
1000 Lux
1.005
1.000
0.995
VDD = 3V
REXT = 100kΩ
0.990
1.5
2.0
2.5
3.0
SUPPLY VOLTAGE (V)
3.5
4.0
FIGURE 15. NORMALIZED OUTPUT VOLTAGE vs SUPPLY
VOLTAGE
FIGURE 14. SUPPLY CURRENT vs TEMPERATURE
9.6
SUPPLY CURRENT
FLUORESCENT LIGHT
1000 Lux
LIGHT INTENSITY
VDD = 3V, REXT = 100kΩ
LIGHT INTENSITY RISES FROM 0 LUX TO 300 LUX
AND FALLS FROM 300 LUX TO 0 LUX WITH WHITE LED
9.4
9.2
VOUT
0V
REXT = 100kΩ
NO LOAD
9.0
1.5
2.0
2.5
3.0
SUPPLY VOLTAGE (V)
3.5
FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE
6
4.0
FIGURE 17. TRANSIENT RESPONSE OF ISL29102 TO
CHANGE IN LIGHT INTENSITY
FN6483.1
July 15, 2010
ISL29102
Application Information
Light-to-Voltage Conversion
The ISL29102 has responsiveness that is a square-root
function of the light intensity intercepted by the photodiode in
lux. Because the photodiode has a responsivity that
resembles the human eye, conversion rate is independent of
the light source (fluorescent light, incandescent light or direct
sunlight).
1.8μA
V OUT = ----------------------- E × R EXT
100lux
(EQ. 1)
In Equation 1, VOUT is the output voltage, E is the light
intensity and REXT is the value of the external resistor. The
REXT is used to set the light-to-voltage scaling constant. The
compliance of the ISL29102's output circuit may result in
premature saturation when an excessively large REXT is
used. The output compliance voltage is 700mV below the
supply voltage as listed in VO-MAX of the “Electrical
Specifications” table on page 3.
Optical Sensor Location Outline
The green area in Figure 18 shows the optical sensor
location outline of ISL29102. Along the pinout direction, the
center line (CL) of the sensor coincides with that of the
packaging. The sensor width in this direction is 0.39mm.
Perpendicular to the pinout direction, the CL of the sensor
has an 0.19mm offset from the CL of packaging away from
pin 1. The sensor width in this direction is 0.46mm.
2.00mm
SENSOR OFFSET
2.10mm
0.46mm
0.19mm
0.39mm
FIGURE 18. 6 LD ODFN SENSOR LOCATION OUTLINE
7
FN6483.1
July 15, 2010
ISL29102
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure
you have the latest Rev.
DATE
REVISION
CHANGE
12/12/08
FN6483.1
Added MSL Note 3 to “Ordering Information” to page 1.
Corrected Eval board name from ISL29102IROZEVALZ to ISL29102IROZ-EVALZ in “Ordering Information”
on page 1.
Added “Related Literature” on page 1 per new data sheet standards.
Updated Theta JA in “Thermal Information” on page 3 from 90C/W to 88C/W per ASYD in Intrepid. Added
Note 4.
Revised VO-MAX spec in “Electrical Specifications” table on page 3 from:
Description: Maximum Output Compliance voltage at 95% of nominal output
TYP: VDD - 0.7V
To:
Description: Maximum Output Voltage Swing
TYP: removed (was VDD - 0.7V)
MAX: added "VDD"
Added new spec to “Electrical Specifications” table on page 3 as follows:
VO-CMPL
Description: Maximum Output Compliance voltage at 95% of nominal output
TYP: VDD - 0.7V
Updated package outline drawing L6.2x2.1 on page 9 to most recent revision. Changes to POD were:
Changing the way we dimension the solder pad recommendation on the PODs. Changes inc:
Bottom View: Added dimension callouts for solder pad
Land Pattern: Added package outline and package outline dimensions.
Added lead width of 6x0.30±0.05 and note 4 callout to bottom view
Increased the size of the pin 1 shaded area
Added “Revision History” on page 8 & “Products” on page 8 per new data sheet standards.
7/1/08
FN6483.0
Initial release.
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's
products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and
notebooks. Intersil's product families address power management and analog signal processing functions. Go to
www.intersil.com/products for a complete list of Intersil product families.
*For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information
page on intersil.com: ISL29102
To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff
FITs are available from our website at http://rel.intersil.com/reports/search.php
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
8
FN6483.1
July 15, 2010
ISL29102
Package Outline Drawing
L6.2x2.1
6 LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN)
Rev 2, 6/10
2.10
A
6
PIN #1
INDEX AREA
B
6
PIN 1
INDEX AREA
1
0.65
1.35
2.00
1.30 REF
4 6X 0.30±0.05
(4X)
0.10
0.10 M C A B
0.65
TOP VIEW
6x0.35 ± 0.05
BOTTOM VIEW
2.50
PACKAGE
OUTLINE
2.10
SEE DETAIL "X"
0.65
0.10 C
(4x0.65)
C
BASE PLANE
SEATING PLANE
0.08 C
SIDE VIEW
(1.35)
(6x0.30)
C
(6x0.20)
0 . 2 REF
5
0 . 00 MIN.
0 . 05 MAX.
(6x0.55)
TYPICAL RECOMMENDED LAND PATTERN
DETAIL "X"
NOTES:
1.
Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2.
Dimensioning and tolerancing conform to ASME Y14.5m-1994.
3.
Unless otherwise specified, tolerance : Decimal ± 0.05
4.
Dimension applies to the metallized terminal and is measured
between 0.15mm and 0.30mm from the terminal tip.
5.
Tiebar shown (if present) is a non-functional feature.
6.
The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 identifier may be
either a mold or mark feature.
9
FN6483.1
July 15, 2010
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