TSL25711 Light-to-Digital Converter0 pages

TSL2571
LIGHT-TO-DIGITAL CONVERTER

r
r

TAOS117A − FEBRUARY 2011

Features

PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)

D Ambient Light Sensing (ALS)
−
−
−
−

D

D
D
D

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 mA Typical Current
I2C Interface Compatible
− Up to 400 kHz (I2C Fast Mode)
− Dedicated Interrupt Pin
Small 2 mm y 2 mm ODFN Package
Sleep Mode — 2.5 mA Typical Current

VDD 1

6 SDA

SCL 2

5 INT

GND 3

4 NC

Applications
D
D
D
D
D
D

Display Management
Backlight Control
Portable Device Power Optimization
Cell Phones, PDA, GPS
Notebooks and Monitors
LCD TVs

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
Interrupt

GND

INT

Wait Control
CH0
Data

ALS Control
CH0
CH1
ADC

CH1
Data

Lower Limit

I2C Interface

Upper Limit
CH0
ADC

VDD

SCL

SDA

CH1

The LUMENOLOGY r Company

Copyright E 2011, TAOS Inc.

r

Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759
r
www.taosinc.com

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