ISL29020

® ISL29020 Data Sheet August 20, 2009 FN6505.1 A Low Power, High Sensitivity, Light-to Digital Sensor With I2C Interface The ISL29020 is a low power, high sensitivity, integrated light sensor with I2C (SMBus Compatible) interface. Its state-of-the-art photodiode array provides close-to human eye response and good IR rejection. 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, typical power consumption 55µA. In order to further minimize power consumption, two power-down modes have been provided. If polling is chosen over continuous measurement of light, the auto-power-down function shuts down the whole chip after each ADC conversion for the measurement. The other power-down mode is controlled by software via the I2C interface. The power consumption can be reduced to less than 1µA when powered down. Designed to operate on supplies from 2.25V to 3.3V with I2C supply from 1.7V to 3.6V, the ISL29020 is specified for operation over the -40°C to +85°C ambient temperature range. Features • Low Power - 65µA Max Operating Current - 0.5µA Max Shutdown Current - Software Shutdown and Automatic Shutdown • Ideal Spectral Response - Close to Human Eye Response - Excellent IR and UV Rejection • Easy to Use - Simple Output Code Directly Proportional to lux - I2C (SMBus Compatible) Output - No Complex Algorithms Needed - Variable Conversion Resolution up to 16-bits - Adjustable Sensitivity up to 65 Counts per lux - Works Under Various Light Sources, Including Sunlight - 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 - Temperature Compensated - Integrated 50/60Hz Noise Rejection • Small Form Factor - 2.0mmx2.1mmx0.7mm 6 Ld ODFN Package • Additional Features - I2C and SMBus Compatible - 1.7V to 3.6V Supply for I2C Interface - 2.25V to 3.3V Supply - Address Selection Pin • Pb-Free (RoHS compliant) Ordering Information PART NUMBER (Note) ISL29020IROZ-T7* ISL29020IROZ-EVALZ PACKAGE (Pb-Free) 6 Ld ODFN PKG. DWG. # L6.2x2.1 Evaluation Board (Pb-free) *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. Applications • Display and keypad dimming 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 sensing Block Diagram VDD 1 MODE GAIN/RANGE INT TIME SHDN PHOTODIODE ARRAY LIGHT DATA PROCESS COMMAND REGISTER DATA REGISTER I2C/SMBus 5 SCL 6 SDA INTEGRATING ADC EXT TIMING Pinout ISL29020 (6 LD ODFN) TOP VIEW VDD 1 6 SDA 5 SCL 4 A0 IREF fOSC 216 COUNTER 3 REXT 2 GND ISL29020 4 A0 GND 2 REXT 3 *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. Copyright © Intersil Americas Inc. 2008, 2009. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ISL29020 Absolute Maximum Ratings (TA = +25°C) VDD Supply Voltage between VDD and GND . . . . . . . . . . . . . 3.6V I2C Bus Pin Voltage (SCL, SDA) . . . . . . . . . . . . . . . . . -0.2V to 3.6V I2C Bus Pin Current (SCL, SDA) . . . . . . . . . . . . . . . . . . . . . .