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ISL29012 View Datasheet(PDF) - Intersil

Part NameDescriptionManufacturer
ISL29012 Light-to-Digital Output Sensor with High Sensitivity, Gain Selection, Interrupt Function and I2C Bus™ Intersil
Intersil Intersil
ISL29012 Datasheet PDF : 15 Pages
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®
Data Sheet
December 10, 2008
ISL29012
FN6476.1
Light-to-Digital Output Sensor with High
Sensitivity, Gain Selection, Interrupt
Function and I2C Bus™
The ISL29012 is an integrated light sensor with I2C (SMBus
Compatible) interface. It has an internal signed 15-bit
integrating type ADC designed based on the
charge-balancing A/D conversion technique. This ADC is
capable of rejecting 50Hz and 60Hz flicker caused by
artificial light sources. The lux range select feature allows
the user to program the lux range for optimized counts/lux.
In normal operation, power consumption is typically 250µA.
Furthermore, a power-down mode can be controlled by
software via the I2C interface, reducing power consumption
to less than 1µA.
The ISL29012 supports a hardware interrupt that remains
asserted low until the host clears it through I2C interface.
Designed to operate on supplies from 2.5V to 3.3V, the
ISL29012 is specified for operation over the -40°C to +85°C
ambient temperature range.
Ordering Information
PART NUMBER
(Note)
TEMP.
PACKAGE
RANGE (°C) (Pb-Free)
PKG.
DWG. #
ISL29012IROZ-T7*
-40 to +85 6 Ld ODFN L6.2x2.1
ISL29012IROZ-EVALZ Evaluation Board
*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.
Block Diagram
VDD
1
LIGHT DATA
PROCESS
PHOTODIODE
ARRAY
IREF
FOSC
3
REXT
INTEGRATING
ADC
EXT
TIMING
216
COUNTER
2
GND
ISL29012
COMMAND
REGISTER
DATA
REGISTER
I2C
5 SCL
6 SDA
INT
INTERRUPT 4 INT
Features
• Range Select Via I2C
- Range 1 = 0.5 lux to 2,000 lux
- Range 2 = 0.5 lux to 8,000 lux
- Range 3 = 0.5 lux to 32,000 lux
- Range 4 = 0.5 lux to 128,000 lux
• Human Eye Response (540nm Peak Sensitivity)
• Temperature Compensated
• Signed 15-bit Resolution
• Adjustable Resolution: Up to 20 Counts per lux
• User-programmable Upper and Lower Threshold Interrupt
• Simple Output Code, Directly Proportional to lux
• IR + UV Rejection
• 50Hz/60Hz Rejection
• 2.5V to 3.3V Supply
• 6 Ld ODFN (2.1mmx2mm)
• Pb-Free (RoHS compliant)
• Operating Temperature Range: -40°C to +85°C
• I2C and SMBus Compatible
Applications
• Display and Keypad Backlight Dimming
- Mobile Devices: Smart phone, PDA, and GPS
- Computing Devices: Notebook PC, UMPC Web Pod
- Consumer Devices: LCD-TV, Digital Picture Frame and
Digital Cameras
• Industrial and Medical Light Sensing
Pinout
ISL29012
(6 LD ODFN)
TOP VIEW
VDD 1
GND 2
REXT 3
6 SDA
5 SCL
4 INT
*EXPOSED PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
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.
I2C Bus is a registered trademark owned by NXP Semiconductors Netherlands, B.V
Copyright © Intersil Americas Inc. 2008. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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