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ISL29011IROZ-EVALZ View Datasheet(PDF) - Intersil

Part NameDescriptionManufacturer
ISL29011IROZ-EVALZ Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function Intersil
Intersil Intersil
ISL29011IROZ-EVALZ Datasheet PDF : 16 Pages
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®
Data Sheet
February 4, 2010
ISL29011
FN6467.3
Digital Ambient Light Sensor and
Proximity Sensor with Interrupt Function
The ISL29011 is an integrated ambient and infrared light to
digital converter with a built-in IR LED driver and I2C Interface
(SMBus Compatible). This device provides not only ambient
light sensing to allow robust backlight/display brightness
control but also infrared sensing to allow proximity estimation
featured with interrupt function.
For ambient light sensing, an internal ADC has been
designed based on the charge-balancing A/D conversion
technique. The ADC conversion time is nominally 90ms and
is user adjustable from 11µs to 90ms, depending on
oscillator frequency and ADC resolution. This ADC is
capable of rejecting 50Hz and 60Hz flicker noise caused by
artificial light sources. The lux-range-select feature allows
users to program the lux range for optimized counts/lux.
For proximity sensing, the ADC is used to digitize the output
signal from the photodiode array when the internal IR LED
driver is turned on and off for the programmed time periods
under user-selected modulation frequency to drive the
external IR LED. As this proximity sensor employs a noise
cancellation scheme to highly reject unwanted IR noise, the
digital output of proximity sensing decreases with distance.
The driver output current is user selectable up to 100mA to
drive different types of IR emitters LEDs.
Six different modes of operation can be selected via the I2C
interface: Programmable ALS once with auto power-down,
programmable IR sensing once, programmable proximity
sensing once, programmable continuous ALS sensing,
programmable continuous IR sensing and programmable
continuous proximity sensing. The programmable one-time
operation modes greatly reduce power because an immediate
automatic shutdown reduces overall supply current less than
0.5µA.
The ISL29011 supports both hardware and software
interrupts that remain asserted until the host clears it through
I2C interface for ambient light sensing and proximity
detection.
Designed to operate on supplies from 2.25V to 3.63V, the
ISL29011 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.
Features
Proximity Sensing
• Ambient IR Cancellation During Proximity Sensing
- Works Under Direct Sunlight
• IR LED Driver with Programmable Source Current
- Adjustable Current Drive from 100mA to 12.5mA
• Programmable LED current Modulation Frequency
• Variable Conversion Resolution
Ambient Light Sensing
• Simple Output Code Directly Proportional to lux
• Adjustable Sensitivity up to 65 Counts per lux
• Selectable Range (via I2C)
- Range 1 = 0.015 lux to 1,000 lux
- Range 2 = 0.06 lux to 4,000 lux
- Range 3 = 0.24 lux to 16,000 lux
- Range 4 = 0.96 lux to 64,000 lux
• Integrated 50/60Hz Noise Rejection
• Works Under Various Light Sources, Including Sunlight
Ideal Spectral Response for Light and Proximity Sensor
• Light Sensor Close to Human Eye Response
- Excellent Light Sensor IR and UV Rejection
• Proximity sensor range from 850nm to 950nm
- Can use either 850nm or 950nm LED solution
Ultra Low Power
• 90μA Max Operating Current
• Software Shutdown and Automatic Shutdown
- 0.5μA Max Shutdown Current
Easy to Use
• I2C (SMBus Compatible) Output
• No Complex Algorithms Needed
• Temperature Compensated
• Small Form Factor
- 8 Ld 2.0mmx2.1mmx0.7mm ODFN Package
Additional Features
• I2C and SMBus Compatible
• 1.7V to 3.63V Supply for I2C Interface
• 2.25V to 3.63V Sensor Power Supply
• Pb-Free (RoHS compliant)
Applications
• Display and Keypad Dimming Adjustment and Proximity
Sensing for:
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Notebook PC, Webpad
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital
Camera
• Industrial and Medical Light and Proximity Sensing
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. 2009, 2010. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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