FEATURES

INTERFACE:

3.4MHz High-Speed Mode

4kV HBM, 1kV CDM, 200V MM

REFH OUT

REFH

Digital

(2.0V to 5.5V)

Analog

(7V to 18V)

REFL

AO

LD

SCL

SDA

REFL OUT

OUT 18

OUT 17

Control IF

OUT 1

OUT 2

18 Output Channels plus

Two V

BUF20800

V

CO M OUT1

V

CO M OUT2

APPLICATIONS

SOLUTIONS

DESCRIPTION

The BUF20800 is a programmable voltage reference

generator designed for gamma correction in TFT-LCD

panels. It provides 18 programmable outputs for gamma

with 10-bit resolution.

This programmability replaces the traditional, time-

consuming process of changing resistor values to optimize

the various gamma voltages and allows designers to

determine the correct gamma voltages for a panel very

quickly. Required changes can also be easily implemented

without hardware changes.

The BUF20800 uses TI’s latest, small-geometry analog

CMOS process, which makes it a very competitive choice

for full production, not just evaluation.

Programming of each output occurs through an industry-

standard, two-wire serial interface. Unlike existing

programmable buffers, the BUF20800 offers a high-speed

mode that allows clock speeds up to 3.4MHz.

For lower channel count, please contact your local sales

or marketing representative.

The

BUF20800

is

available

in

an

HTSSOP-38

PowerPAD

 package. It is specified from −40°C to +85°C.

BUF20800 RELATED PRODUCTS

FEATURES

PRODUCT

BUF20820

12-Channel Programmable Buffer, 10-Bit

BUF12800

BUF01900

11-, 6-, 4-Channel Gamma Correction Buffer, 18V Supply

BUFxx704

SN10501

Complete LCD DC/DC Solution

TPS65100

BUF20800

SBOS329D − JUNE 2005 − REVISED OCTOBER 2006

18-Channel GAMMA VOLTAGE GENERATOR

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

www.ti.com

Copyright

 2005−2006, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners.