The ISL29101 is a low power ambient Light-to-Voltage
optical sensor combining a photodiode array, a current
amplifier and a micropower operational amplifier on a single
monolithic IC. Similar to the human eye, the photodiode
array has a peak response at 550nm and spans from 400nm
to 600nm, rejecting UV light and IR light. The output voltage
is proportional to the visible light intensity from 0.5 lux up to
10,000 lux. However, the input luminance range can go up to
30,000 lux with some compromise in linearity.
A dark current compensation circuit aids the photodiode array
to minimize temperature dependent leakage currents in the
absence of light, improving the light sensity at low lux levels.
Housed in an ultra-compact surface mount 2mmx2.1mm
ODFN clear plastic package, this device is excellent for
power saving control functions in cell phones, PDAs, and
other handheld applications.

Features
• 0.5 lux to 10,000 lux range
• 1.8V to 3.3V supply range
• Low supply current
• Fast response time
• Excellent linearity of output voltage vs light intensity
• Close to human eye response
• Good IR rejection
• Internal temperature compensation
• Operating temperature range -40°C to +85°C
• Ultra-compact surface mount package
• Pb-free (RoHS compliant)

Applications
• Display and keypad dimming for:
- Mobile devices: smart phone, PDA, GPS
- Computing devices: notebook PC, webpod
- Consumer devices: LCD-TV, digital picture frame, digital
camera
• Industrial and medical light sensing