TSL2580 Datasheet, PDF (1/34 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – LIGHT-TO-DIGITAL CONVERTER

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Features
D Approximately 30y More Sensitive Than the
TSL2560/61 Device
D Approximates Human Eye Response
D Programmable ALS Interrupt Function with
User-Defined Upper and Lower Threshold
Settings
D 16-Bit Digital Output with SMBus (TSL2580)
at 100 kHz or I²C (TSL2581) Fast-Mode at
400 kHz
D Programmable Analog Gain and Integration
Time Supporting 1,000,000-to-1 Dynamic
Range
D Available in Ultra-Small 1.25 mm y 1.75 mm
Chipscale Package
D Automatically Rejects 50/60-Hz Lighting
Ripple
D Low Quiescent Current 3 mA in Power
Down Mode
D RoHS Compliant
TSL2580, TSL2581
LIGHT-TO-DIGITAL CONVERTER
TAOS098 − MARCH 2010
PACKAGE CS
6-LEAD CHIPSCALE
(TOP VIEW)
V_dd 1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
Package Drawings are Not to Scale
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
V_dd 1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
Applications
D Ambient Light Sensor (ALS) for Smart
Phones, Digital Photo Frames, and Portable
Navigation Systems
D ALS for LED Signs, Laptop Computers, and
LCD TVs
Description
The TSL2580 and TSL2581 are very-high sensitivity light-to-digital converters that transform light intensity to
a digital signal output capable of direct I²C (TSL2581) or SMBus (TSL2580) interface. Each device combines
one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS
integrated circuit capable of providing a near-photopic response over an effective 16-bit dynamic range (16-bit
resolution). Two integrating ADCs convert the photodiode currents to a digital output that represents the
irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance
(ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The
TSL2580 device permits an SMB-Alert style interrupt, and the TSL2581 device supports a traditional level style
interrupt that remains asserted until the firmware clears it.
While useful for general purpose light sensing applications, the TSL2580/81 devices are designed particularly
for display panels (LCD, OLED, etc.) with the purpose of extending battery life and providing optimum viewing
in diverse lighting conditions. Display panel backlighting, which can account for up to 30 to 40 percent of total
platform power, can be automatically managed. Both devices are also ideal for controlling keyboard illumination
based upon ambient lighting conditions. Illuminance information can further be used to manage exposure
control in digital cameras. The TSL2580/81 devices are ideal in notebook/tablet PCs, LCD monitors, flat-panel
televisions, cell phones, and digital cameras. In addition, other applications include street light control, security
lighting, sunlight harvesting, machine vision, and automotive instrumentation clusters.
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 2010, TAOS Inc.
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