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