ISL29002
Light-to-Digital I²C Sensor

Key Features

• I²C interface fast mode at 400kHz
• 88µA disabled current
• Adjustable max lux range: 10,000lux to 100,000lux
• Up to 15-bit effective resolution
• Adjustable resolution: 0.15 to 1.65 counts per lux
• Simple output code proportional to lux
• Flicker/noise rejection
• Variable integration time; 50ms to 550ms
• 2.5V to 3.3V supply
• 8 Ld ODFN (3mmx3mm)
• Temperature compensation
• Pb-free available (RoHS compliant)

Description

The ISL29002 is an integrated light sensor with a built-in integrating type ADC and a standard I²C interface. The device transforms illuminance, ambient light level in lux, into a digital output signal accessible through I²C. The sensor precisely converts illuminance from 1lux to 100,000lux. The ADC features up to 15-bit effective resolution. The sensor includes another photodiode covered with metal to reduce the effects of dark output reading that may be significant in low lux levels.

The ISL29002 can control display panel backlighting depending on ambient light conditions, adding artificial intelligence by approximating the response of a human eye. The ISL29002 can also manage portable peripheral illumination based upon lighting conditions extending battery life.

In normal operation, the ISL29002 consumes less than 300µA of supply current. A software power down mode is controlled via the I²C interface and disables all but the I²C interface. The supply current is then reduced to less than 88µA.

Designed to operate on supplies from 2.5V to 3.3V, the ISL29002 is specified for operation over the
-40^oC to +85^oC ambient temperature range. It is packaged in a clear, Pb-free 8 Ld ODFN package.

Applications

• Backlight sensing
• Automatic backlight adjustment
• Backlight linearity adjustments