TSL4531 Datasheet, PDF (1/16 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – DIGITAL AMBIENT LIGHT SENSOR

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Features
D Simple Direct Lux Output
D Approximates Human Eye Response in
Diverse Lighting Conditions
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
D Low Active Current (110 mA typical) with
Power Down Mode (2.2 mA typical) Enables
Green Products
D 16-bit Digital Output with I²C Compatibility
D Ultra-Small 2 mm y 2 mm ChipLED package
D 2.5-V Supply Voltage with 1.8-V Logic
Interface
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
PACKAGE CL
ChipLED
(TOP VIEW)
V_DD 1
4 SCL
GND 2
3 SDA
Package Drawing Not to Scale
Applications
D Outdoor Lighting Control
− Street Lights
− Security Lights
− Traffic Signals
− Commercial Billboards
D Display Backlight Control
− Automotive Instrumentation
− Cell Phones
− Tablets and Notebooks
D Solid-State and General Lighting and
Daylight Harvesting
− Commercial Lighting
− Industrial Lighting
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 I²C 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
SCL
Photodiode
Array
SDA
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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