ISL29009_14 Datasheet, PDF (1/7 Pages) Intersil Corporation – Non-Linear Output Current, Low Power Ambient Light Photo Detect IC

Data Sheet
July 1, 2008
ISL29009
FN6484.0
Non-Linear Output Current, Low Power
Ambient Light Photo Detect IC
The ISL29009 is a light-to-current silicon optical sensor
combining a photodiode and current amplifiers on a single
monolithic IC. Similar to human eyes, the photodiode has
peak sensitivity at 550nm and spans from 400nm to 700nm,
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 aids the photodiode to minimize
temperature dependent leakage currents in the absence of
light, improving the light sensitivity at low lux levels.
In addition, the ISL29009 has an EN pin that can be used for
a polling scheme extending portables’ battery life.
The ISL29009 is housed in an ultra compact 2mmx2.1mm
ODFN plastic case surface mount package. Operation is
rated from -40°C to +85°C.
Simplified Block Diagram
VDD
1
LIGHT DATA
PROCESS
CURRENT
AMPLIFIER
OUTPUT CURRENT α √LIGHT INTENSITY
IOUT
6
PHOTODIODE
GND
ARRAY
EN
2
4
Ordering Information
PART
NUMBER
(Note)
TEMP.
PACKAGE
RANGE (°C) (Pb-free) PKG. DWG. #
ISL29009IROZ-T7* -40 to +85 6 Ld ODFN L6.2x2.1
*Please refer to TB347 for details on reel specifications.
NOTE: 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 Pb-free
peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
Features
• Non-linear current output
• 0.3 lux to 10,000 lux range
• Dark current compensation
• Temperature compensated
• Human eye response
• 1.8V to 3.3V supply range
• Low supply current
• Fast response time
• 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
Pinout
ISL29009
(6 LD ODFN)
TOP VIEW
VDD 1
6 IOUT
GND 2
NC 3
THERMAL
PAD*
5 NC
4 EN
*THERMAL PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
PIN NAME
DESCRIPTION
VDD Supply, 1.8V to 3.3V
GND Ground
NC No connect
EN Active LO enable
NC No connect
IOUT Current output
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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