DISPLAY

COLUMN DRIVER

ROW

DRIVER

MULTI

SOURCE

DC/DC

CONVERTER

& LDO

TIMING

CONTROL

REFERENCE

GAMMA CORRECTION CURVE

LM8207

18 GAMMA BUFFER

BUFFER

LM8342

LM8207

www.ti.com

SNOSAL5A – SEPTEMBER 2005 – REVISED MARCH 2013

Check for Samples: LM8207

1

FEATURES

DESCRIPTION

The LM8207 is a combination of 18-channel gamma

2

•

buffers,

a

driver

and

a

temperature

•

compensated

internal

voltage

reference.

It

is

•

designed for buffering voltage levels and driving high

capacitive loads in large TFT panels. The gamma

buffers are individually optimized to the input/output

•

Stable (1%) Internal 1.295V Reference, to

requirements of their respective gamma position to

Improve Picture Quality and Reduce Variations

cover the whole voltage range from rail to rail. Any

•

48-pin TSSOP Package

desired gamma correction curve can be obtained by

combining the gamma buffers with external resistors.

APPLICATIONS

and is stable with large capacitive loads, typical for

•

large panel sizes. This will result in a fast recovery

Voltage Buffering

time for large voltage variations at the output. The

internal band gap reference can be used to form a

highly

stable

voltage

to

generate

the

gamma

correction voltages. In combination with the internal

amplifier, the reference voltage can be programmed

to voltages up to the positive rail. The LM8207 is

offered in a 48-pin TSSOP package.

TFT Panel Block Diagram

1

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.