DATASHEET ISL29027 FN7815 Rev 1.00 Proximity Sensor with Intelligent Interrupt and Sleep Modes February 2, 2012 The ISL29027 is an integrated infrared light-to-digital converter Features 2 with a built-in IR LED driver and I C Interface (SMBus Works Under All Light Sources Including Sunlight Compatible). The flexible interrupt scheme is designed for minimal microcontroller utilization. Intelligent Interrupt Scheme Simplifies C Code For proximity sensor (Prox) data conversions, the built-in driver Proximity Sensing turns on an external infrared LED and the proximity sensor ADC Proximity Sensor with Broad IR Spectrum converts the reflected IR intensity to digital. This ADC rejects - Can Use 850nm and 950nm External IR LEDs ambient IR noise (such as sunlight) and has a 540s conversion 2 IR LED Driver with I C Programmable Sink Currents time. -Net 100s Pulse with 110mA or 220mA Amplitudes The ISL29027 provides proximity sensing with a typical 138A normal operation current (110A for sensors and internal - Periodic Sleep Time up to 800ms Between Pulses circuitry, ~28A for external LED) with 220mA current pulses for a Ambient IR Noise Cancellation (Including Sunlight) net 100s, repeating every 800ms (or under). Intelligent and Flexible Interrupts The ISL29027 uses both a hardware pin and software bits to Proximity Interrupt Thresholds indicate an interrupt event has occurred. A proximity interrupt Adjustable Interrupt Persistency is defined as a measurement over a threshold limit. The user - 1/4/8/16 Consecutive Triggers Required Before Interrupt may also require that proximity interrupts occur at once, up to Ultra Low Power 16 times in a row before activating the interrupt pin. 138A DC Typical Supply Current for Prox Sensing The ISL29027 is designed to operate from 2.25V to 3.63V over the -110 A for Sensors and Internal Circuitry -40C to +85C ambient temperature range. It is packaged in a -28 A Typical Current for External IR LED (Assuming clear, lead-free 8 lead ODFN package. 220mA for 100 s Every 800ms) <1.0 A Supply Current When Powered Down Applications Easy to Use - Mobile Devices: Smart Phone, PDA, GPS Set Registers Wait for Interrupt - Computing Devices: Laptop PC, Netbook 2 I C (SMBus Compatible) Output - Consumer Devices: LCD-TV, Digital Picture Frame, Digital Temperature Compensated Camera Tiny ODFN8 2.0x2.1x0.7 (mm) Package Additional Features 2 1.7V to 3.63V Supply for I C Interface 2.25V to 3.63V Sensor Power Supply Pb-Free (RoHS Compliant) 2 I C Address Selection Pin 2 COMMAND REGISTER LIGHT DATA CHANNEL PROCESS DATA ADC IR REGISTER ADDR0 1 2 SCL 5 I C IR PHOTODIODE ARRAY SDA 6 IREF INTERRUPT INT 7 FOSC IRDR 8 IR DRIVER 4 3 REXT GND FIGURE 1. BLOCK DIAGRAM FN7815 Rev 1.00 Page 1 of 13 February 2, 2012ISL29027 Pin Configuration Pin Descriptions ISL29027 PIN PIN 8 LD ODFN (2.0mmx2.1mmx0.7mm) NUMBER NAME DESCRIPTION TOP VIEW 0 T.PAD Thermal Pad (connect to GND or float) ADDR0 1 8 IRDR 2 1ADDR0I C address pin - pull high or low (do not float) VDD 2 7 INT THERMAL PAD 2 VDD Positive supply: 2.25V to 3.63V GND 3 6 SDA 3GNDGround REXT 4 5 SCL 4 REXT External resistor (499k 1%) connects this pin to ground *THERMAL PAD CAN BE CONNECTED TO GND OR ELECTRICALLY ISOLATED 2 2 5SCLI C clock line The I C bus lines can be pulled from 1.7V to above V , 3.63V DD 2 6SDAI C data line max 7INT Interrupt pin Logic output (open-drain) for interrupt 8 IRDR IR LED driver pin - current flows into ISL29027 from LED cathode Ordering Information PACKAGE PART NUMBER TEMP. RANGE Tape & Reel PKG. (Notes 1, 2, 3) (C) (Pb-free) DWG. ISL29027IROZ-T7 -40 to +85 8 Ld ODFN L8.2.1x2.0 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 ISL29027. For more information on MSL, please see Technical Brief TB477. FN7815 Rev 1.00 Page 2 of 13 February 2, 2012