The ISL29020 is a low power, high sensitivity, integrated light sensor with I2C (SMBus compatible) interface. Its state-of-the-art photodiode array provides close to human eye response and good IR rejection. This ADC is capable of rejecting 50Hz and 60Hz flicker caused by artificial light sources. The lux range select feature allows the user to program the lux range for optimized counts/lux. In normal operation, typical power consumption 55µA. In order to further minimize power consumption, two power-down modes have been provided. If polling is chosen over continuous measurement of light, the auto-power-down function shuts down the whole chip after each ADC conversion for the measurement. The other power-down mode is controlled by software via the I2C interface. The power consumption can be reduced to less than 1µA when powered down. Designed to operate on supplies from 2.25V to 3.3V with I2C supply from 1.7V to 3.6V, the ISL29020 is specified for operation over the -40 °C to +85 °C ambient temperature range.


  • Low power
    • 65µA max operating current
    • 0.5µA max shutdown current
  • Software shutdown and automatic shutdown
  • Ideal spectral response
    • Close to human eye response
    • Excellent IR and UV rejection
  • Easy to use
    • Simple output code directly proportional to lux
    • I2C (SMBus compatible) output
    • No complex algorithms needed
    • Variable conversion resolution up to 16-bits
    • Adjustable sensitivity up to 65 counts per lux
    • Works under various light sources, including sunlight
    • Selectable range (via I2C)
      • Range 1 = 0.015 lux to 1,000 lux
      • Range 2 = 0.06 lux to 4,000 lux
      • Range 3 = 0.24 lux to 16,000 lux
      • Range 4 = 0.96 lux to 64,000 lux
    • Temperature compensated
    • Integrated 50Hz/60Hz noise rejection
  • Small form factor
    • 2.0mm x 2.1mm x 0.7mm 6 Ld ODFN package
  • Additional features
    • I2C and SMBus compatible
    • 1.7V to 3.6V supply for I2C interface
    • 2.25V to 3.3V supply
    • Address selection pin
  • Pb-Free (RoHS compliant)




  • Display and keypad dimming for:
    • Mobile devices: Smartphones, PDAs, GPS
    • Computing devices: Notebook PCs, webpads
    • Consumer devices: LCD-TVs, digital picture frames, digital cameras
  • Industrial and medical light sensing


Type Title Date
Datasheet PDF 803 KB
End Of Life Notice PDF 1.17 MB
Product Change Notice PDF 138 KB
End Of Life Notice PDF 345 KB
Product Change Notice PDF 76 KB
Product Change Notice PDF 95 KB
Application Note PDF 248 KB
Application Note PDF 186 KB
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