TSL2571
LIGHT-TO-DIGITAL CONVERTER
r
r
TAOS117A − FEBRUARY 2011
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
Features
D Ambient Light Sensing (ALS)
− Approximates Human Eye Response
− Programmable Analog Gain
6 SDA
5 INT
4 NC
VDD
1
− Programmable Integration Time
− Programmable Interrupt Function with
Upper and Lower Threshold
SCL 2
GND 3
− Resolution Up to 16 Bits
− Very High Sensitivity — Operates Well
Behind Darkened Glass
− Up to 1,000,000:1 Dynamic Range
Applications
D Programmable Wait Timer
− Programmable from 2.72 ms
to > 8 Seconds
D Display Management
D Backlight Control
− Wait State — 65 mA Typical Current
D Portable Device Power Optimization
D Cell Phones, PDA, GPS
D Notebooks and Monitors
D LCD TVs
2
D I C Interface Compatible
2
− Up to 400 kHz (I C Fast Mode)
− Dedicated Interrupt Pin
D Small 2 mm ꢀ 2 mm ODFN Package
D Sleep Mode — 2.5 mA Typical Current
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
INT
GND
Wait Control
Upper Limit
Lower Limit
CH0
ADC
CH0
Data
V
DD
SCL
SDA
ALS Control
CH0
CH1
ADC
CH1
Data
CH1
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
Texas Advarnced 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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