The ISL29102 is a low cost light-to-voltage silicon optical sensor combining a photodiode array, a non-linear current amplifier and a micro-power op amp on a single monolithic
IC. Similar to human eyes, the photodiode array has peak
sensitivity at 550nm and spans from 400nm to 600nm,
rejecting UV light and IR light. The input luminance range is
from 0.3 lux to 10,000 lux.
The integrated non-linear current amplifier boosts and
converts the photodiode signal in a square root fashion,
extending the light input dynamic range while maintaining
excellent sensitivity at dim conditions with low lux levels. The
device consumes minimal power over a wide range of
ambient lux levels because the current consumption ramps
at a square root fashion. A dark current compensation circuit
minimizes the effect of temperature dependent leakage
currents in the absence of light, improving the light sensity at
low lux levels while maintaining excellent sensitivity at low
lux levels. The built-in 1μA op amp gives the ISL29102 an
output voltage driving advantage for heavier loads.
The ISL29102 is housed in an ultra compact 2mmx2.1mm
ODFN plastic case surface mount package. Operation is rated from -40°C to +85°C.