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ISL29102
Data Sheet
July 15, 2010
FN6483.1
Low Power Ambient Light-to-Voltage
Non-Linear Converter
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
Features
? Square Root Voltage Output
? 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
PART NUMBER
(Notes 2, 3)
ISL29102IROZ-T7 (Note 1)
ISL29102IROZ-EVALZ
NOTES:
PACKAGE
(Pb-Free)
6 Ld ODFN
(Tape and Reel)
Evaluation Board
PKG.
DWG. #
L6.2x2.1
Related Literature
? See AN1422 , “Light Sensor Applications”
Simplified Block Diagram
V D D
1
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
LIGHT DATA
PROCESS
CURRENT
AMPLIFIER
OUTPUT CURRENT α √ LIGHT INTENSITY
-
+
VOUT
6
operations. Intersil Pb-free products are MSL classified at Pb-
free 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
G N D
2
PHOTODIODE
ARRAY
4 REXT
please see techbrief TB363 .
1
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.
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