DATASHEET ISL29147 FN8409 Rev 3.00 Low Power Ambient Light and Proximity Sensor with Enhanced Infrared Rejection January 6, 2015 The ISL29147 is a low power Ambient Light Sensor (ALS) and Features proximity (PROX) sensor. It has a built-in IR-LED for the Internal IR-LED and sensor for a complete solution proximity function. The ALS function measures the amount of light (in the visible spectrum) incident on the ISL29147. Ideal for applications under dark or tinted glass The ALS function has a programmable ambient IR-rejection, Enhanced ambient sunlight rejection to 40k Lux which allows fine tuning of light source variations and is ideal Programmable proximity sleep time between proximity for light sensor applications under dark protective glass. The measurements optimizes power consumption ALS provides a 12-bit measurement. A passive optical filter Hardware interrupt - no polling required removes unwanted wavelengths (IR or Ultraviolet) to ensure accurate ALS measurement. Programmable IR compensation to fine-tune ALS performance for various glass compositions The proximity function includes a new offset adjustment to Programmable IR LED drive current to 250mA compensate for the IR light reflected off the inside of the protective glass cover and back to the ISL29147 sensor. This Operates from 2.25V to 3.63V V DD offset adjustment allows the sensor to compensate for these Power-down I typical 0.2A DD, DC internal reflections and preserve the dynamic range of the proximity measurement. Tiny 2.40x4x1.2 (mm) optical co-package The built-in current-driver pulses an external infrared LED at a Applications programmed current for 90s. The infrared light that is reflected and received by the ISL29147 is digitized by an 8-bit Display dimming and adjustment ADC. The proximity sensor also has a passive optical filter - Mobile devices: smart phones, PDA, GPS designed to pass IR and reject visible wavelengths. - Computing: monitors, laptops, notebooks The ISL29147 provides a hardware pin to indicate an interrupt - Picture frames, tablet-PCs, LCD-TV event. The interrupt pin saves power as the host microcontroller Object detection can wake-up on an interrupt event and does not need to poll the device for an interrupt event. The interrupt generator is - Touchscreen disabling user configurable and provides several options for ALS and -Smart power-saving PROX trigger configurations. The ISL29147 supports an SMBus 2 compatible I C interface for configuration and control. 250 VDD PULLUP V SCL, SDA and DD IRDR 250mA INT PULLUPs SMBus MASTER 200 SCL U1 5 4 SDA SDA VDD 6 3 R C 1 2 150 SCL INT INT 7 2 100 1F GND IRDR 8 1 LED+ LED- IRDR 125mA C 1 100 ISL29147 1F 50 R : 100 5% RESISTOR 1 0 C , C : 1F CERAMIC 10V CAPACITOR 1 2 0 150 50 100 DISTANCE (mm) FIGURE 1. TYPICAL APPLICATIONS CIRCUIT FIGURE 2. PROXIMITY SENSITIVITY FN8409 Rev 3.00 Page 1 of 15 January 6, 2015 V IRLED DD PROXIMITY COUNTS ISL29147 Block Diagram VDD 5 ALS PHOTODIODE ARRAY COMMAND REGISTER PHOTODIODE DUAL CHANNEL AMPLIFIERS DATA ADCs (ALS AND IR) REGISTER 2 SCL 6 I C IR PHOTODIODE ARRAY 4 IREF SDA INTERRUPT 3 FOSC INT IRDR 2 IR DRIVER 7 8 1 GND LED+ LED- Pin Configuration Pin Description ISL29147 PIN NAME DESCRIPTION (8 LD 2.40x4 (mm) OPTICAL CO-PACKAGE) TOP VIEW 1 LED- Cathode of IR LED. 2 IRDR IR-LED Driver Sink - Connect to IR LED Cathode. LED- 1 8 LED+ 3INT Active Low, Open-Drain Output. IRDR 2 7 GND 2 4SDA I C Serial Data Input/Output. INT SCL 3 6 5 VDD Positive supply: 2.25V to 3.63V. SDA 4 5 VDD 2 6SCL I C Serial Clock Input. 7GND Ground. 8LED+ Anode of IR LED. Ordering Information PART NUMBER PART V RANGE TEMP RANGE PACKAGE PKG. DD (Notes 1, 2, 3) MARKING (V) (C) (RoHS Compliant) DWG. ISL29147IROMZ-T7 N/A 2.25 to 3.63 -40 to +85 8 Ld Optical Co-package L8.2.40x4 ISL29147IROMZ-EVALZ Evaluation Board 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 product information page for ISL29147. For more information on MSL, please see tech brief TB363. FN8409 Rev 3.00 Page 2 of 15 January 6, 2015