TSL2568 Datasheet, PDF (1/36 Pages) TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS – LIGHT-TO-DIGITAL CONVERTER

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D Approximates Human Eye Response
D Approximately 4y More Sensitive Than
TSL2560/61 Device
D Programmable Interrupt Function with
User-Defined Upper and Lower Threshold
Settings
D 16-Bit Digital Output with SMBus (TSL2568)
at 100 kHz or I²C (TSL2569) 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 Active Power (0.75 mW Typical) with
Power Down Mode
D RoHS Compliant
TSL2568, TSL2569
LIGHT-TO-DIGITAL CONVERTER
TAOS091D − DECEMBER 2008
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 T
6-LEAD TMB
(TOP VIEW)
V_DD 1
ADDR SEL 2
GND 3
6 SDA
5 INT
4 SCL
Description
The TSL2568 and TSL2569 are high-sensitivity light-to-digital converters that transform light intensity to a digital
signal output capable of direct I²C (TSL2569) or SMBus (TSL2568) 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
TSL2568 device permits an SMB-Alert style interrupt, and the TSL2569 device supports a traditional level style
interrupt that remains asserted until the firmware clears it.
While useful for general purpose light sensing applications, the TSL2568/69 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 TSL2568/69 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 2008, TAOS Inc.
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