TSL2581, TSL2583

LIGHT-TO-DIGITAL CONVERTER

TAOS134 − MARCH 2011

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The LUMENOLOGY

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Copyright

E 2011, TAOS Inc.

www.taosinc.com

Features

Device

User-Defined Upper and Lower Threshold

Settings

400 kHz

Time Supporting 1,000,000-to-1 Dynamic

Range

Chipscale Package and Small 2 mm

Flat No-Lead Package

Ripple

Down Mode

Applications

Brightness Control

End Products and Market Segments

Description

The TSL2581 and TSL2583 are very-high sensitivity light-to-digital converters that transform light intensity to

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 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 TSL2581/83 devices are designed particularly

for displays (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 50 to 60 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 TSL2581/83 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.

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Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road

S Suite 300 S Plano, TX 75074 S (972) 673-0759

PACKAGE CS

6-LEAD CHIPSCALE

(TOP VIEW)

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)

6 SDA

5 INT

4 SCL

ADDR SEL 2

GND 3