The ISL29023 is an integrated ambient and infrared light to
digital converter with I2C (SMBus Compatible) Interface. Its
advanced self-calibrated photodiode array emulates human eye
response with excellent IR rejection. The on-chip ADC is capable
of rejecting 50Hz and 60Hz flicker caused by artificial light
sources. The lux range select feature allows users to program the
lux range for optimized counts/lux.
For ambient light sensing, an internal 16-bit ADC has been
designed based upon the charge-balancing technique. The
ADC conversion time is nominally 90ms and is user adjustable
from 11µs to 90ms, depending on oscillator frequency and
ADC resolution. In normal operation, typical current
consumption is 70µA. 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
0.3µA when powered down.
The ISL29023 supports a software and hardware interrupt that
remains asserted until the host clears it through I2C interface.
Function of ADC conversion continues without stopping after
interrupt is asserted.
Designed to operate on supplies from 2.25V to 3.63V with an I2C
supply from 1.7V to 3.63V, the ISL29023 is specified for
operation over the -40°C to +85°C ambient temperature range.

Features
• Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-bits ADC
• Integrated noise reduction . . . . . . . . . . . . . . . . . . . . . 50/60Hz
• Light sensor close to human eye response
• Excellent light sensor IR and UV rejection
• Range selection via I2C
- Range1 = 0.015 to 1,000 Lux
- Range2 = 0.06 to 4,000 Lux
- Range3 = 0.24 to 16,000 Lux
- Range4 = 0.96 to 64,000 Lux
• Shutdown modes . . . . . . . . . . . . . . . .Software and Automatic
• Supply current (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85µA
• Shutdown current (Max) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3µA
• Control interface . . . . . . . . . . . . . . . I2C and SMB Compatible
• I2C power supply . . . . . . . . . . . . . . . . . . . . . . . . . 1.7V to 3.63V
• Sensor power supply . . . . . . . . . . . . . . . . . . . . . 2.25V to 3.63V
• Operating temperature range. . . . . . . . . . . . . -40°C to +85°C
• Small form factor package . . . . . . . . .6 Ld 2.0x2.1x0.7 ODFN

Applications
• Mobile devices: smart phone, PDA, GPS
• Computing devices: Notebook PC, Webpad
• Consumer devices: LCD-TV, digital picture frame, digital camera
• Industrial and medical light sensing