DATASHEET
ISL76671 FN7716
Rev 3.00
April 20, 2015 Low Power, <100 Lux Optimized, Analog Output Ambient Light Sensor
The ISL76671 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 the human eye, the photodiode array has peak
sensitivity at 550nm and spans the wavelength range 400nm
to 600nm, rejecting UV and IR light. The input luminance range
is from 0.01 lux to 100 lux. Features The integrated non-linear current amplifier boosts and
converts the photodiode signal into a square root output
format, extending dynamic range while maintaining excellent
sensitivity in dimly lit conditions. As such, the part is ideal for
measuring incident daylight when mounted behind heavily
smoked bezels used around displays or behind mirrors. Fast response time The device consumes minimum power. A dark current
compensation circuit minimizes the effect of temperature
dependent leakage currents in the absence of light, improving
the light sensitivity at low lux levels. The output gain has been
optimized to require a relatively low value external bias resistor
that falls within recommended automotive EMI limits. The
built-in 1ВµA op amp gives the ISL76671 an output voltage
driving advantage for heavier loads that can drive an ADC …
