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ISL29002
Data Sheet
December 1, 2006
FN7465.2
Light-to-Digital I 2 C Sensor
The ISL29002 is an integrated light sensor with a built-in
integrating type ADC and a standard I 2 C interface. The
device transforms illuminance, ambient light level in lux, into
a digital output signal accessible through I 2 C. The sensor
precisely converts illuminance from 1lux to 100,000lux. The
ADC features up to 15-bit effective resolution. The sensor
includes another photodiode covered with metal to reduce
the effects of dark output reading that may be significant in
low lux levels.
The ISL29002 can control display panel backlighting depending
on ambient light conditions, adding artificial intelligence by
approximating the response of a human eye. The ISL29002
can also manage portable peripheral illumination based upon
lighting conditions extending battery life.
In normal operation, the ISL29002 consumes less than 300μA
of supply current. A software power down mode is controlled
via the I 2 C interface and disables all but the I 2 C interface. The
supply current is then reduced to less than 88μA.
Designed to operate on supplies from 2.5V to 3.3V, the
ISL29002 is specified for operation over the -40°C to +85°C
ambient temperature range. It is packaged in a clear, Pb-free
8 Ld ODFN package.
Block Diagram
Features
? I 2 C interface fast mode at 400kHz
? 88μA disabled current
? Adjustable max lux range: 10,000lux to 100,000lux
? Up to 15-bit effective resolution
? Adjustable resolution: 0.15 to 1.65 counts per lux
? Simple output code proportional to lux
? Flicker/noise rejection
? Variable integration time; 50ms to 550ms
? 2.5V to 3.3V supply
? 8 Ld ODFN (3mmx3mm)
? Temperature compensation
? Pb-free available (RoHS compliant)
Applications
? Backlight sensing
? Automatic backlight adjustment
? Backlight linearity adjustments
Ordering Information
VDD
1
PART NUMBER
(Note)
TEMP.
RANGE
(°C)
TAPE &
REEL
PACKAGE
(Pb-Free)
PKG.
DWG. #
PHOTODIODE 1
COMMAND
REGISTER
ISL29002IROZ
ISL29002IROZ-T7
-40 to +85
-40 to +85
-
7”
8 Ld 3x3 ODFN MDP0052
8 Ld 3x3 ODFN MDP0052
MUX
INTEGRATING
ADC
DATA
REGISTER
NOTE: Intersil Pb-free ODFN products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
PHOTODIODE2
IREF
FOSC
2 16
COUNTER
I 2 C
7 SCL
8 SDA
termination finish, which are RoHS compliant and compatible with both
SnPb and Pb-free soldering 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.
Pinout
ISL29002
3
2
6
5
4
(8 LD ODFN)
R EXT
GND
A2 A1 A0
VDD 1
GND 2
R EXT 3
A0 4
TOP VIEW
THERMAL
PAD
8 SDA
7 SCL
6 A2
5 A1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2006. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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