DATASHEET ISL29044 FN8305 Rev 2.00 Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital April 28, 2016 Output The ISL29044 is an integrated ambient and infrared Features 2 light-to-digital converter with a built-in IR LED and I C Interface Internal LED + Sensor = Complete Solution (SMBus Compatible). This device uses two independent ADCs for concurrently measuring ambient light and proximity in Works under all light sources including sunlight parallel. The flexible interrupt scheme is designed for minimal Dual ADCs measure ALS/Prox concurrently microcontroller utilization. <1.0A Supply current when powered down For ambient light sensor (ALS) data conversions, an ADC Temperature compensated converts photodiode current (with a light sensitivity range up to 2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz Pb-Free (RoHS compliant) flicker noise caused by artificial light sources. Intelligent and Flexible Interrupts For proximity sensor (Prox) data conversions, the built-in driver Independent ALS/Prox interrupt thresholds turns on an internal infrared LED and the proximity sensor ADC Adjustable interrupt persistency converts the reflected IR intensity to digital. This ADC rejects - 1/4/8/16 consecutive triggers required before interrupt ambient IR noise (such as sunlight) and has a 547s conversion time. Applications The ISL29044 provides low power operation of ALS and Display and keypad dimming adjustment and proximity proximity sensing with a typical 133A normal operation sensing for: current (108 A for sensors and internal circuitry, ~25A for - Mobile devices: Smart phone, PDA, GPS LED) with 220mA current pulses for a net 100 s, repeating - Computing devices: Laptop PC, Netbook, Tablet PC every 800ms (or under). - Consumer devices: LCD-TV, digital picture frame, digital The ISL29044 uses both a hardware pin and software bits to camera indicate an interrupt event has occurred. An ALS interrupt is - Industrial and medical light and proximity sensing defined as a measurement that is outside a set window. A proximity interrupt is defined as a measurement over a Related Literature threshold limit. The user may also require that both ALS/Prox See AN1436, Proximity Sensors 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 SCL 50 INT SCL 110mA WHITE SDA 8 1 40 SDA VDD VDD INT 2 2 I C SLAVE n I C SLAVE 1 30 C2 ISL29044 C1 CONTROLLER 220mA GREY SCL SCL 1F 0.1F 20 SDA SDA 10 110mA GREY 2 0 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 FN8305 Rev 2.00 Page 1 of 19 April 28, 2016 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 Rev 2.00 Page 2 of 19 April 28, 2016