Description

The TSL2571 family of devices provides ambient light sensing (ALS) that approximates human eye response to light intensity under a variety of lighting conditions and through a variety of attenuation materials. While useful for general purpose light sensing, the device is particularly useful for display management with the purpose of extending battery life and providing optimum viewing in diverse lighting conditions. Display panel and keyboard backlighting can account for up to 30 to 40 percent of total platform power. The ALS features are ideal for use in notebook PCs, LCD monitors, flat-panel televisions, and cell phones.

Features

● Ambient Light Sensing (ALS)

− Approximates Human Eye Response

− Programmable Analog Gain

− Programmable Integration Time

− Programmable Interrupt Function with Upper and Lower Threshold

− Resolution Up to 16 Bits

− Very High Sensitivity — Operates Well Behind Darkened Glass

− Up to 1,000,000:1 Dynamic Range

● Programmable Wait Timer<

− Programmable from 2.72 ms to > 8 Seconds

− Wait State — 65 μA Typical Current

● I2C Interface Compatible

− Up to 400 kHz (I2C Fast Mode)

− Dedicated Interrupt Pin

● Small 2 mm x 2 mm ODFN Package

● Sleep Mode — 2.5 μA Typical Current

Applications

● Display Management

● Backlight Control

● Portable Device Power Optimization

● Cell Phones, PDA, GPS

● Notebooks and Monitors

● LCD TVs