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TSL2560, TSL2561
LIGHT-TO-DIGITAL CONVERTER
TAOS059K
−
APRIL 2007
D
Approximates Human Eye Response to
Control Display Backlight and Keyboard
Illumination
Lighting Conditions Providing Exposure
Control in Cameras
PACKAGE CS
6-LEAD CHIPSCALE
(TOP VIEW)
D
Precisely Measures Illuminance in Diverse
D
Programmable Interrupt Function with
D
D
D
D
V
DD
1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
User-Defined Upper and Lower Threshold
Settings
16-Bit Digital Output with SMBus (TSL2560)
or I
2
C (TSL2561) Fast-Mode at 400 KHz
Programmable Analog Gain and Integration
Time Supporting 1,000,000-to-1 Dynamic
Range
Available in Ultra-Small 1.25 mm
y
1.75 mm
Chipscale Package
Automatically Rejects 50/60-Hz Lighting
Ripple
Power Down Mode
Package Drawings are Not to Scale
PACKAGE T
6-LEAD TMB
(TOP VIEW)
V
DD
1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
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Low Active Power (0.75 mW Typical) with
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RoHS Compliant
Description
The TSL2560 and TSL2561 are light-to-digital converters that transform light intensity to a digital signal output
capable of direct I
2
C (TSL2561) or SMBus (TSL2560) 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 20-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 TSL2560 device
permits an SMB-Alert style interrupt, and the TSL2561 device supports a traditional level style interrupt that
remains asserted until the firmware clears it.
While useful for general purpose light sensing applications, the TSL2560/61 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 TSL2560/61 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
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Company
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road
S
Suite 300
S
Plano, TX 75074
S
(972) 673-0759
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www.taosinc.com
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Copyright
E
2007, TAOS Inc.
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
