Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output ISL29044 Features Internal LED + Sensor = Complete Solution The ISL29044 is an integrated ambient and infrared 2 light-to-digital converter with a built-in IR LED and I C Interface Works under all light sources including sunlight (SMBus Compatible). This device uses two independent ADCs Dual ADCs measure ALS/Prox concurrently for concurrently measuring ambient light and proximity in parallel. The flexible interrupt scheme is designed for minimal <1.0A Supply current when powered down microcontroller utilization. Temperature compensated For ambient light sensor (ALS) data conversions, an ADC Pb-Free (RoHS compliant) converts photodiode current (with a light sensitivity range up to Intelligent and Flexible Interrupts 2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz Independent ALS/Prox interrupt thresholds flicker noise caused by artificial light sources. Adjustable interrupt persistency For proximity sensor (Prox) data conversions, the built-in driver - 1/4/8/16 consecutive triggers required before interrupt turns on an internal infrared LED and the proximity sensor ADC converts the reflected IR intensity to digital. This ADC rejects Applications ambient IR noise (such as sunlight) and has a 547s conversion time. Display and keypad dimming adjustment and proximity sensing for: The ISL29044 provides low power operation of ALS and - Mobile devices: Smart phone, PDA, GPS proximity sensing with a typical 133A normal operation current (108 A for sensors and internal circuitry, ~25A for - Computing devices: Laptop PC, Netbook, Tablet PC LED) with 220mA current pulses for a net 100 s, repeating - Consumer devices: LCD-TV, digital picture frame, digital every 800ms (or under). camera - Industrial and medical light and proximity sensing The ISL29044 uses both a hardware pin and software bits to indicate an interrupt event has occurred. An ALS interrupt is Related Literature defined as a measurement that is outside a set window. A See AN1436, Proximity Sensors proximity interrupt is defined as a measurement over a threshold limit. The user may also require that both ALS/Prox interrupts occur at once, up to 16 times in a row before activating the interrupt pin. The ISL29044 is designed to operate from 2.25V to 3.63V over the -40C to +85C ambient temperature range. It is packaged in a clear, lead-free 8 Ld ODFN package. V LED V PULLUP 100 90 2 I C SLAVE 0 80 R1 R2 R3 5 4 C3 RES1 RES1 RES1 LED- LED+ 70 0.1F 2 220mA WHITE 6 3 I C MASTER IRDR GND 60 7 2 50 INT SCL SCL 110mA WHITE SDA 8 1 40 SDA VDD VDD INT 2 2 I C SLAVE 1 I C SLAVE n 30 C2 C1 CONTROLLER 220mA GREY ISL29044 SCL SCL 1F 20 0.1F SDA SDA 10 110mA GREY 0 2 2 I C-DIAGRAM I C-DIAGRAM 0 20 40 60 80 100 120 140 160 DISTANCE (mm) FIGURE 1. TYPICAL APPLICATION FIGURE 2. PROXIMITY RESPONSE vs DISTANCE April 28, 2016 CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Copyright Intersil Americas LLC. 2012, 2016. All Rights Reserved FN8305.2 Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. NOT RECOMMENDED FOR NEW DESIGNS RECOMMENDED REPLACEMENT PART ISL29044A FSR (%)ISL29044 ISL29044 Block Diagram VDD 1 ALS PHOTODIODE ARRAY COMMAND REGISTER LIGHT DATA DUAL CHANNEL PROCESS DATA ADCs ALS AND IR REGISTER 2 SCL 2 I C IR PHOTODIODE ARRAY 8 SDA IREF INTERRUPT INT 7 FOSC 6 IRDR IR DRIVER 3 4 5 GND LED+ LED- Pin Configuration Pin Descriptions ISL29044 PIN PIN NAME DESCRIPTIONS (8 LD 2.36X3.94 (mm) OPTICAL CO-PACKAGE) TOP VIEW 1 VDD Voltage supply 2.25V to 3.63V. 2 2SCL I C clock line can be pulled from 1.7V to above V , DD LED- LED+ 5 4 3.63V max. IRDR 6 3 GND 3GND Ground SCL INT 7 2 4LED+ Anode of IR LED SDA 8 1 VDD 5LED- Cathode of IR LED 6 IRDR IR-LED driver pin - current flows into ISL29044 from LED cathode. 7INT Interrupt pin Logic output (open-drain) for interrupt. 2 8SDA I C data line can be pulled from 1.7V to above V , DD 3.63V max. Ordering Information PACKAGE PART NUMBER TEMP. RANGE Tape & Reel PKG. (Notes 1, 2, 3) (C) (Pb-free) DWG. ISL29044IROMZ-T7 -40 to +85 8 Ld Optical Co-package L8.2.36x3.94 ISL29044IROMZ-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, NiPdAu plate (e4 termination finish), which are all RoHS compliant. The ISL29044 is compatible with limited SnPb and Pb-free soldering operations. The ISL29044 is MSL classified. See Tech Brief TB487 (Surface Mount Assembly Guidelines for Optical Co-Package Sensor and LED) for reflow profile and more information. 3. For more information on MSL please see tech brief TB477. FN8305.2 2 April 28, 2016