ISL29120 Datasheet, PDF (1/8 Pages) Intersil Corporation – Digital Output, Low Power, Red, Green, and Blue Color Light Sensor

Digital Output, Low Power, Red, Green, and Blue Color
Light Sensor
ISL29120
The ISL29120 is a low power, high sensitivity, integrated red,
green, and blue light sensor with an I²C (SMBus Compatible)
interface. Its state-of-the-art photodiode array provides an
accurate red, green and blue spectral response. The ADC is
capable of rejecting 50Hz and 60Hz flicker caused by artificial
light sources. A selectable range allows the user to optimize
sensitivity suitable for the specific application.
ISL29120 is optimized for sensing red, green and blue light
components in an non-infrared environment (fluorescent and
LED lighting). When operating in infrared rich environments, an
external IR blocking filter should be used for accurate
measurements.
In normal continuous operation, the ISL29120 power
consumption is 70µA, which reduces to 0.3µA in power down
mode. In polling mode, the auto-power-down function shuts down
most of the device after each ADC conversion.
The ISL29120 supports both hardware and software interrupts.
The interrupt thresholds are user programmable. The Interrupt
persistency feature reduces false trigger notification.
Designed to operate on supplies from 2.25V to 3.3V and I²C supply
from 1.7V to 3.6V, the ISL29120 is specified for operation over the
-40°C to +85°C ambient temperature range.
Features
• 70µA Operating Current, 0.3µA Shutdown Current
• I²C (SMBus Compatible) Output
• Programmable 4, 8, 12 or 16-bits ADC Resolution
• Programmable Interrupt Windows
• Two Optical Sensitivity Ranges
• 2.25 to 3.63V Operating Power Supply
• 1.7V to 3.6V Supply for I²C Interface
• 2.0mmx2.1mmx0.7mm 6 Ld ODFN Package
Applications
• Smart Phone, PDA, GPS, Tablet PCs, LCD-TVs, Digital Picture
Frames, Digital Cameras
• Dynamic Display Color Balancing
• Printer Color Enhancement
• Industrial/Commercial LED Lighting Color Management
• Ambient Light Color Detection/Correction
• OLED Display Aging Compensation
VDD_PULLUP
SMBMaster
VDD
R2
100Ω
INT
SDA
SCL
4
6
5
INT
SDA
SCL
VDD
REXT
GND
1
3
2
PULL-UP RESISTORS
2.7kΩ TO 10kΩ
ISL29120
R1
499kΩ
C1
1µF
FIGURE 1. TYPICAL APPLICATION
0.5
RED SENSOR
0.4
BLUE SENSOR
0.3
0.2
0.1
GREEN SENSOR
0
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 2. RELATIVE SPECTRAL SENSITIVITY FOR RED, GREEN AND
BLUE SENSE MODES
May 29, 2012
1
FN8314.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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