The ISL29011 is an integrated ambient and infrared light-to-digital converter with a built-in IR LED driver and I2C Interface (SMBus Compatible). This device provides not only ambient light sensing to allow robust backlight/display brightness control but also infrared sensing to allow proximity estimation featured with interrupt function. For ambient light sensing, an internal ADC has been designed based on the charge-balancing A/D conversion technique. The ADC conversion time is nominally 90ms and is user adjustable from 11µs to 90ms, depending on oscillator frequency and ADC resolution. This ADC is capable of rejecting 50Hz and 60Hz flicker noise caused by artificial light sources. The lux-range-select feature allows users to program the lux range for optimized counts/lux. For proximity sensing, the ADC is used to digitize the output signal from the photodiode array when the internal IR LED driver is turned on and off for the programmed time periods under user-selected modulation frequency to drive the external IR LED. As this proximity sensor employs a noise cancellation scheme to highly reject unwanted IR noise, the digital output of proximity sensing decreases with distance. The driver output current is user selectable up to 100mA to drive different types of IR emitter LEDs. Six different modes of operation can be selected via the I2C interface: Programmable ALS once with auto power-down, programmable IR sensing once, programmable proximity sensing once, programmable continuous ALS sensing, programmable continuous IR sensing and programmable continuous proximity sensing. The programmable one-time operation modes greatly reduce power because an immediate automatic shutdown reduces overall supply current less than 0. 5µA. The ISL29011 supports both hardware and software interrupts that remain asserted until the host clears it through the I2C interface for ambient light sensing and proximity detection. Designed to operate on supplies from 2. 25V to 3. 63V, the ISL29011 is specified for operation over the -40°C to +85°C ambient temperature range. It is packaged in a clear, Pb-free 8 Ld ODFN package.


  • Proximity Sensing
  • Ambient IR cancellation during proximity sensing
  • Works under direct sunlight
  • IR LED driver with programmable source current
  • Adjustable current drive from 100mA to 12.5mA
  • Programmable LED current modulation frequency
  • Variable conversion resolution
  • Simple output code directly proportional to lux
  • Adjustable sensitivity up to 65 counts per lux
  • Selectable range (via I2C)
  • Integrated 50Hz/60Hz noise rejection
  • Works under various light sources, including sunlight
  • Light sensor close to human eye response
  • Excellent light sensor IR and UV rejection
  • Proximity sensor range from 850nm to 950nm
  • Can use either 850nm or 950nm LED solution
  • 90µA max operating current
  • Software shutdown and automatic shutdown
  • 0.5µA max shutdown current
  • I2C (SMBus compatible) output
  • No complex algorithms needed
  • Temperature compensated
  • Small form factor
  • 8 Ld 2.0mmx2.1mmx0.7mm ODFN package
  • I2C and SMBus compatible
  • 1.7V to 3.63V supply for I2C interface
  • 2.25V to 3.63V sensor power supply
  • Pb-Free (RoHS compliant)


  • Display and keypad dimming adjustment and proximity sensing for:
  • Mobile devices: smart phone, PDA, GPS
  • Computing devices: Notebook PC, Webpad
  • Consumer devices: LCD-TV, digital picture frame, digital camera
  • Industrial and medical light and proximity sensing

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active DODFN Reel 3000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL29011 Datasheet Datasheet PDF 1.19 MB
User Guides & Manuals
ISL290xxiroz-evalz, ISL29xxxeval1z User Guide Manual PDF 1.74 MB
ISL29011IROZ-EVALZ User Guide Manual PDF 355 KB
Application Notes & White Papers
AN1436 Application Note PDF 563 KB
AN1682: What are the Advantages of Packaging a Proximity Sensor with an Ambient Light Sensor? Application Note PDF 276 KB
AN1737: Eye Safety for Proximity Sensing Using Infrared Light-Emitting Diodes Application Note PDF 712 KB
AN1623: Updating Intersil USB Evaluation Firmware Application Note PDF 400 KB
AN1534: VDD Power-Up and Power Supply Considerations for Intersil Ambient Light Sensors Application Note PDF 186 KB
PCN15010 - Additional assembly facility of the listed Intersil ODFN packaged products Product Change Notice PDF 76 KB
PCN10053 - Alternate Manufacturing Site for Assembly of Intersil ODFN Packaged Products - Hana Microelectronics Public Co., Ltd. Lamphun, Thailand Product Change Notice PDF 95 KB
ISL29011 IBIS Model Model IBS 52 KB
Intersil ISL29xxx HID Installer v1.39 Library EXE 3.56 MB
ISL29011, ISL29018, ISL29021, ISL29023 Evaluation Board Software v1.0.7 Library EXE 2.41 MB

Boards & Kits

Part Number Title Type Company
ISL29006IROZ-EVALZ Small, Low Power, Current-Output Ambient Light Photo Detect IC Eval Board Evaluation
ISL29009IROZ-EVALZ Non-Linear Output Current, Low Power Ambient Light Photo Detect IC Eval Board Evaluation
ISL29011IROZ-EVALZ Digital Ambient Light Sensor and Proximity Sensor Evaluation Board Evaluation
ISL29018IROZ-EVALZ Digital Ambient Light Sensor and Proximity Sensor Evaluation Board Evaluation
ISL29020IROZ-EVALZ Low Power, High Sensitivity, Light-to Digital Sensor Evaluation Board Evaluation
ISL29021IROZ-EVALZ Digital Proximity Sensor with Interrupt Function Evaluation Board Evaluation
ISL29023IROZ-EVALZ Integrated Digital Light Sensor with Interrupt Evaluation Board Evaluation
ISL29028AIROZ-EVALZ Low Power Ambient Light and Proximity Sensor Evaluation Board Evaluation
ISL29030AIROZ-EVALZ Low Power Light and Proximity Sensor Evaluation Board Evaluation
ISL29030IROZ-EVALZ 530nm Low Power Light and Proximity Sensor Evaluation Board Evaluation
ISL29033IROZ-EVALZ Ultra-Low Lux, Low Power, Integrated Digital Ambient Light Sensor Evaluation Board Evaluation
ISL29034IROZ-EVALZ Integrated Digital Light Sensor Evaluation Board Evaluation
ISL29038IROZ-EVALZ Ambient Light and Proximity Sensor Evaluation Board Evaluation
ISL29043IROMZ-EVALZ Ambient Light and Proximity Sensor Evaluation Board Evaluation