BUF20800

ACTIVO

Generador de tensión gamma de 18 canales con dos canales VCOM programables

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Hoja de datos

document-pdfAcrobat 18-Channel, Gamma Voltage Generator with Two Programmable Vcom Channels datasheet (Rev. E) (Inglés)

BUF20800

ACTIVO

Hoja de datos

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Detalles del producto

Display type

LCD unipolar

IC integration

Gamma buffer, VCOM

Vin (min) (V)

7

Vin (max) (V)

18

Applications

13 to 21 inches, 21 inches and above, 7 inches or less, 7 to 13 inches

Source driver voltage (min) (V)

7

Source driver voltage (max) (V)

18

Level shifter/scan driver (Ch)

0

Features

Gamma buffer, I2C interface, VCOM or op amp

Rating

Catalog

Operating temperature range (°C)

-40 to 95

Display type

LCD unipolar

IC integration

Gamma buffer, VCOM

Vin (min) (V)

7

Vin (max) (V)

18

Applications

13 to 21 inches, 21 inches and above, 7 inches or less, 7 to 13 inches

Source driver voltage (min) (V)

7

Source driver voltage (max) (V)

18

Level shifter/scan driver (Ch)

0

Features

Gamma buffer, I2C interface, VCOM or op amp

Rating

Catalog

Operating temperature range (°C)

-40 to 95

HTSSOP (DCP)

38

62.08 mm² (9.7 mm × 6.4 mm)

18-CHANNEL GAMMA CORRECTION
2-CHANNEL PROGRAMMABLE V_COM:
100mA I_OUT
10-BIT RESOLUTION
RAIL-TO-RAIL OUTPUT
LOW SUPPLY CURRENT: 900µA/ch
SUPPLY VOLTAGE: 7V to 18V
DIGITAL SUPPLY: 2.0V to 5.5V
INDUSTRY-STANDARD, TWO-WIRE INTERFACE:
3.4MHz High-Speed Mode
HIGH ESD RATING:
4kV HBM, 1kV CDM, 200V MM
DEMO BOARD AND SOFTWARE AVAILABLE
APPLICATIONS
- REPLACES RESISTOR-BASED GAMMA SOLUTIONS
- TFT-LCD REFERENCE DRIVERS
- DYNAMIC GAMMA CONTROL

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

18-CHANNEL GAMMA CORRECTION
2-CHANNEL PROGRAMMABLE V_COM:
100mA I_OUT
10-BIT RESOLUTION
RAIL-TO-RAIL OUTPUT
LOW SUPPLY CURRENT: 900µA/ch
SUPPLY VOLTAGE: 7V to 18V
DIGITAL SUPPLY: 2.0V to 5.5V
INDUSTRY-STANDARD, TWO-WIRE INTERFACE:
3.4MHz High-Speed Mode
HIGH ESD RATING:
4kV HBM, 1kV CDM, 200V MM
DEMO BOARD AND SOFTWARE AVAILABLE
APPLICATIONS
- REPLACES RESISTOR-BASED GAMMA SOLUTIONS
- TFT-LCD REFERENCE DRIVERS
- DYNAMIC GAMMA CONTROL

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

The BUF20800 is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 18 programmable outputs for gamma correction and two channels for V_COM adjustment, each with 10-bit resolution.

This programmability replaces the traditional, timeconsuming 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.

The BUF20800 is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 18 programmable outputs for gamma correction and two channels for V_COM adjustment, each with 10-bit resolution.

This programmability replaces the traditional, timeconsuming 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.

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Documentación técnica

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Documentación principal	Tipo	Título	Fecha
*	Hoja de datos	18-Channel, Gamma Voltage Generator with Two Programmable Vcom Channels datasheet (Rev. E)	5/12/2007
	Nota sobre la aplicación	Driving Capacitive Loads with Gamma Buffers	20/11/2012
	EVM User's guide	BUF20800/BUF20820EVM User Guide	8/04/2011

Diseño y desarrollo

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