TSL2571

LIGHT-TO-DIGITAL CONVERTER

TAOS117A − FEBRUARY 2011

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The LUMENOLOGY

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Copyright

E 2011, TAOS Inc.

www.taosinc.com

Features

− 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 from 2.72 ms

to > 8 Seconds

− Wait State — 65

mA Typical Current

− Dedicated Interrupt Pin

Applications

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.

Functional Block Diagram

SDA

INT

SCL

CH1

ADC

ALS Control

CH1

Data

Wait Control

CH0

ADC

CH0

Data

CH0

CH1

Upper Limit

Lower Limit

Interrupt

GND

r

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Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road

S Suite 300 S Plano, TX 75074 S (972) 673-0759

PACKAGE FN

DUAL FLAT NO-LEAD

(TOP VIEW)

SCL 2

GND 3

6 SDA

5 INT

4 NC