DATASHEET ISL29021 FN6732 Rev 0.00 Digital Proximity Sensor with Interrupt Function March 3, 2009 The ISL29021 is an integrated proximity and infrared sensor Features 2 with a built-in IR LED driver and I C Interface (SMBus Proximity Sensing Compatible). This device provides infrared sensing to allow Ambient IR Cancellation During Proximity Sensing proximity estimation featured with interrupt function. - Works Under Direct Sunlight For infrared and proximity sensing, an internal ADC has IR LED Driver with Programmable Source Current been designed based on the charge-balancing A/D - Adjustable Current Drive from 100mA to 12.5mA conversion technique. Programmable LED current Modulation Frequency The ADC is used to digitize the output signal from the Variable Conversion Resolution up to 16-bits photodiode array when the internal IR LED driver is turned on and off for the programmed time periods under 2 Selectable Range (via I C) user-selected modulation frequency to drive the external IR Works Under Various Light Sources, Including Sunlight LED. As this proximity sensor employs a noise cancellation Ideal Spectral Response for Proximity Sensor scheme to highly reject unwanted IR noise, the digital output Proximity sensor range from 850nm to 950nm of proximity sensing decreases with distance. The driver output current is user selectable up to 100mA to drive - Can use either 850nm or 950nm LED solution different types of IR emitters LEDs. Ultra Low Power 2 Four different modes of operation can be selected via the I C 90A Max Operating Current interface: programmable IR sensing once, programmable Software Shutdown and Automatic Shutdown proximity sensing once, programmable continuous IR sensing - 0.5A Max Shutdown Current and programmable continuous proximity sensing. The programmable one-time operation modes greatly reduce power Easy to Use 2 because an immediate automatic shutdown reduces overall I C (SMBus Compatible) Output supply current less than 0.5A. No Complex Algorithms Needed The ISL29021 supports both hardware and software Temperature Compensated interrupts that remain asserted until the host clears it through 2 Small Form Factor I C interface for proximity detection. - 8 Ld 2.0mmx2.1mmx0.7mm ODFN Package Designed to operate on supplies from 2.5V to 3.63V, the ISL29021 is specified for operation over the -40C to +85C Additional Features 2 ambient temperature range. It is packaged in a clear, Pb-free I C and SMBus Compatible 8 Ld ODFN package. 2 1.7V to 3.63V Supply for I C Interface Ordering Information 2.25V to 3.63V Sensor Power Supply PART NUMBER TEMP. RANGE PACKAGE PKG. Pb-Free (RoHS compliant) (Note) (C) (Pb-Free) DWG. Applications ISL29021IROZ-T7* -40 to +85 8 Ld ODFN L8.2.1x2.0 Display and Keypad Proximity Sensing for: ISL29021IROZ-EVALZ Evaluation Board - Mobile Devices: Smart Phone, PDA, GPS *Please refer to TB347 for details on reel specifications. - Computing Devices: Notebook PC, Webpad NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach - Consumer Devices: LCD-TV, Digital Picture Frame, Digital materials and NiPdAu plate - e4 termination finish, which is RoHS Camera compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free Industrial and Medical Proximity Sensing peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN6732 Rev 0.00 Page 1 of 12 March 3, 2009ISL29021 Pinout ISL29021 (8 LD ODFN TOP VIEW) VDDD 1 8 IRDR VDDA 2 7 INT GND 3 6 SDA REXT 4 5 SCL EXPOSED PAD CAN BE CONNECTED TO GND OR ELECTRICALLY ISOLATED Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION 1 VDDD Positive digital supply: 2.5V to 3.63V. 2 VDDA Positive analog supply: 2.5V to 3.63V, VDDA and VDDD should be externally shorted. 3 GND Ground. 4 REXT External resistor pin setting the internal reference current and the conversion time. 499k with 1% tolerance resistor is recommended. 2 2 5SCLI C serial clock line The I C bus lines can be pulled from 1.7V to above V , 3.63V max. DD 2 6SDAI C serial data line 7INT Interrupt pin LO for interrupt/alarming. The INT pin is an open drain. 8 IRDR IR LED driver pin connecting to the anode of the external IR LED. The source current of the IR LED driver can be 2 programmed through I C. Exposed pad connected to ground or electrically isolated. Block Diagram VDDA VDDD 2 1 COMMAND REGISTER IR DATA INTEGRATION PROCESS DATA ADC REGISTER 6 SDA 2 IR PHOTODIODE I C SCL 5 ARRAY IREF INTERRUPT INT 7 FOSC IRDR 8 IR DRIVER 3 4 REXT GND ISL29021 FN6732 Rev 0.00 Page 2 of 12 March 3, 2009