TSL2580, TSL2581

LIGHT-TO-DIGITAL CONVERTER

TAOS098 − MARCH 2010

1

The LUMENOLOGY

r Company

r

r

Copyright

E 2010, TAOS Inc.

www.taosinc.com

Features

TSL2560/61 Device

User-Defined Upper and Lower Threshold

Settings

400 kHz

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

Range

Chipscale Package

Ripple

Down Mode

Applications

Phones, Digital Photo Frames, and Portable

Navigation Systems

LCD TVs

Description

The TSL2580 and TSL2581 are very-high sensitivity light-to-digital converters that transform light intensity to

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.

r

r

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