ISL29023IROZ-T7

DATASHEET ISL29023 FN6691 Rev 4.00 May 1, 2014 Integrated Digital Light Sensor with Interrupt The ISL29023 is an integrated ambient and infrared light to digital converter with I2C (SMBus Compatible) Interface. Its advanced self-calibrated photodiode array emulates human eye response with excellent IR rejection. The on-chip ADC is capable of rejecting 50Hz and 60Hz flicker caused by artificial light sources. The lux range select feature allows users to program the lux range for optimized counts/lux. Features For ambient light sensing, an internal 16-bit ADC has been designed based upon the charge-balancing technique. The ADC conversion time is nominally 90ms and is user adjustable from 11µs to 90ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 70µA. 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 0.3µA when powered down. • Range selection via I2C - Range1 = 0.015 to 1,000 Lux - Range2 = 0.06 to 4,000 Lux - Range3 = 0.24 to 16,000 Lux - Range4 = 0.96 to 64,000 Lux • Shutdown modes . . . . . . . . . . . . . . . .Software and Automatic • Supply current (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85µA The ISL29023 supports a software and hardware interrupt that remains asserted until the host clears it through I2C interface. Function of ADC conversion continues without stopping after interrupt is asserted. • Operating temperature range. . . . . . . . . . . . . -40°C to +85°C Designed to operate on supplies from 2.25V to 3.63V with an I2C supply from 1.7V to 3.63V, the ISL29023 is specified for operation over the -40°C to +85°C ambient temperature range. Applications • Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-bits ADC • Integrated noise reduction . . . . . . . . . . . . . . . . . . . . . 50/60Hz • Light sensor close to human eye response • Excellent light sensor IR and UV rejection • Shutdown current (Max) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3µA • Control interface . . . . . . . . . . . . . . . I2C and SMB Compatible • I2C power supply . . . . . . . . . . . . . . . . . . . . . . . . . 1.7V to 3.63V • Sensor power supply . . . . . . . . . . . . . . . . . . . . . 2.25V to 3.63V • Small form factor package . . . . . . . . .6 Ld 2.0x2.1x0.7 ODFN Related Literature • AN1534 “VDD Power-Up and Power Supply Considerations for Intersil Ambient Light Sensors” • AN1591 “Evaluation Hardware/Software Manual for ALS and Proximity Sensor” • Mobile devices: smart phone, PDA, GPS • AN1757 “I2C Fundamentals” • Computing devices: Notebook PC, Webpad • AN1782 “Ambient Light Sensor (ISL29023) Opto-Mechanical Reference Design” • Consumer devices: LCD-TV, digital picture frame, digital camera • Industrial and medical light sensing 1.2 HUMAN EYE VBUS 1.0 10µF R R 0.1µF R 1 VDD MCU SDA 6 SDA SCL 5 SCL GPIO 4 ISL29023 SENSOR 3 500k INT VSS NORMALIZED RESPONSE VDD 0.8 0.6 0.4 IR SENSING 0.2 0 AMBIENT LIGHT SENSING 2 -0.2 300 400 500 600 700 800 900 1000 1100 WAVELENGTH (nm) FIGURE 1. ISL29023 TYPICAL APPLICATION DIAGRAM FN6691 Rev 4.00 May 1, 2014 FIGURE 2. NORMALIZED SPECTRAL RESPONSE FOR AMBIENT LIGHT SENSING AND IR SENSING Page 1 of 14 ISL29023 Block Diagram VDD REXT 1 3 IREF fOSC PHOTODIODE ARRAY COMMAND REGISTER 5 SCL I2C/SMB LIGHT DATA PROCESS 6 SDA DATA CMD Register REGISTER INTEGRATING ADC INTERRUPT 2 4 INT GND Pin Configuration Pin Descriptions ISL29023 (6 LD ODFN) TOP VIEW 1 VDD 2 GND 3 REXT PAD PIN NUMBER PIN NAME DESCRIPTION 1 VDD Positive supply; connect this pin to a 2.25V to 3.63V supply SDA 6 2 GND Ground pin SCL 5 3 REXT INT 4 External resistor pin for ADC reference; connect this pin to ground through a (nominal) 499kΩ resistor. 4 INT Interrupt pin; low for interrupt alarming. INT pin is open drain. INT remains asserted until the interrupt flag status bit is reset. 5 SCL I2C serial clock. This line can be pulled from 1.7V to above VDD, 3.63V max. 6 SDA I2C serial data. This line can be pulled from 1.7V to above VDD, 3.63V max. PAD Exposed pad connected to ground or electrically isolated *EXPOSED PAD CAN BE CONNECTED TO GND OR ELECTRICALLY ISOLATED Ordering Information PART NUMBER (Notes 1, 2, 3) ISL29023IROZ-T7 ISL29023IROZ-EVALZ TEMP RANGE (°C) -40 to +85 PACKAGE (RoHS Compliant) 6 Ld ODFN PKG. DWG. # L6.2x2.1 Evaluation Board (Pb-free) NOTES: 1. Please refer to TB347 for details on reel specifications. 2. 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. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL29023. For more information on MSL please see tech brief TB477. FN6691 Rev 4.00 May 1, 2014 Page 2 of 14 ISL29023 Absolute Maximum Ratings Thermal Information VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +4.0V I2C Bus (SCL, SDA) and INT Pin Voltage. . . . . . . . . . . . . . . . . . -0.2V to 4.0V I2C Bus (SCL, SDA) and INT Pin Current. . . . . . . . . . . . . . . . . . . . . . .