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TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
Features
D
Simple Direct Lux Output
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Approximates Human Eye Response in
Diverse Lighting Conditions
PACKAGE CL
ChipLED
(TOP VIEW)
V
DD
1
4 SCL
D
Three User-Selectable Integration Times
(400 ms, 200 ms, and 100 ms)
D
Wide Dynamic Range — 3 lux to 220k lux
D
Rejects 50 Hz/60 Hz Lighting Ripple
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Low Active Current (110
mA
typical) with
D
D
D
2.5-V Supply Voltage with 1.8-V Logic
Interface
GND 2
3 SDA
Package Drawing Not to Scale
Power Down Mode (2.2
mA
typical) Enables
Green
Products
16-bit Digital Output with I
2
C Compatibility
Ultra-Small 2 mm
y
2 mm ChipLED package
Applications
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Outdoor Lighting Control
− Street Lights
− Security Lights
− Traffic Signals
− Commercial Billboards
Display Backlight Control
− Automotive Instrumentation
− Cell Phones
− Tablets and Notebooks
Solid-State and General Lighting and
Daylight Harvesting
− Commercial Lighting
− Industrial Lighting
D
D
Description
The TSL4531 family of devices provides ambient light sensing (ALS) that approximates human eye response
under a variety of lighting conditions. The devices have three selectable integration times and provide a direct
16-bit lux output via an I
2
C bus interface. The wide dynamic range of the ALS makes it particularly useful in
outdoor applications where it is exposed to direct sunlight. The device is ideal for use in automatic control of
street lights and security, billboard, and automotive lighting. The TSL4531 devices can also be used in solid state
and general lighting for automatic control and daylight harvesting to maximize energy conservation. Other
applications include display backlight control to extend battery life and optimize visibility in cell phones, tablets,
and notebooks.
Functional Block Diagram
V
DD
I
2
C Interface
Lux Calc
SCL
ADC
SDA
Photodiode
Array
The
LUMENOLOGY
r
Company
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road
S
Suite 300
S
Plano, TX 75074
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(972) 673-0759
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www.taosinc.com
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Copyright
E
2011, TAOS Inc.
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
