TSL2571 Datasheet, PDF (1/24 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – LIGHT-TO-DIGITAL CONVERTER

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Features
D 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
D Programmable Wait Timer
− Programmable from 2.72 ms
to > 8 Seconds
− Wait State — 65 mA Typical Current
D I²C Interface Compatible
− Up to 400 kHz (I²C Fast Mode)
− Dedicated Interrupt Pin
D Small 2 mm y 2 mm ODFN Package
D Sleep Mode — 2.5 mA Typical Current
TSL2571
LIGHT-TO-DIGITAL CONVERTER
TAOS117A − FEBRUARY 2011
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
V_DD 1
SCL 2
GND 3
6 SDA
5 INT
4 NC
Applications
D Display Management
D Backlight Control
D Portable Device Power Optimization
D Cell Phones, PDA, GPS
D Notebooks and Monitors
D 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
GND
V_DD
Wait Control
Interrupt
INT
Upper Limit
CH0
CH0
ADC Data
SCL
CH0
ALS Control
Lower Limit
CH1 CH1
SDA
ADC Data
CH1
The LUMENOLOGY r Company
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Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972_r) 673-0759
www.taosinc.com
Copyright E 2011, TAOS Inc.
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