BUF12800

ACTIVE

12-CH Gamma-Voltage Generator

Product details

Display type LCD unipolar IC integration Gamma buffer 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 Rating Catalog Operating temperature range (°C) -40 to 85
Display type LCD unipolar IC integration Gamma buffer 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 Rating Catalog Operating temperature range (°C) -40 to 85
HTSSOP (PWP) 24 49.92 mm² 7.8 x 6.4
  • 12-CHANNEL GAMMA CORRECTION
  • 10-BIT RESOLUTION
  • DOUBLE-BUFFERED DAC REGISTERS
  • INTEGRATED REFERENCE BUFFERS
  • RAIL-TO-RAIL OUTPUT
  • LOW SUPPLY CURRENT: 900µA/ch
  • SUPPLY VOLTAGE: 7V to 18V
  • DIGITAL SUPPLY: 2.3V to 5.5V
  • INDUSTRY-STANDARD TWO-WIRE INTERFACE
    • High-Speed Mode: 3.4MHz
  • HIGH ESD RATING:
    • 4kV HBM, 1kV CDM, 200V MM
  • DEMO BOARD AND SOFTWARE AVAILABLE
  • APPLICATIONS
    • TFT-LCD REFERENCE DRIVERS
    • REFERENCE VOLTAGE GENERATORS
    • INDUSTRIAL PROCESS CONTROL

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

  • 12-CHANNEL GAMMA CORRECTION
  • 10-BIT RESOLUTION
  • DOUBLE-BUFFERED DAC REGISTERS
  • INTEGRATED REFERENCE BUFFERS
  • RAIL-TO-RAIL OUTPUT
  • LOW SUPPLY CURRENT: 900µA/ch
  • SUPPLY VOLTAGE: 7V to 18V
  • DIGITAL SUPPLY: 2.3V to 5.5V
  • INDUSTRY-STANDARD TWO-WIRE INTERFACE
    • High-Speed Mode: 3.4MHz
  • HIGH ESD RATING:
    • 4kV HBM, 1kV CDM, 200V MM
  • DEMO BOARD AND SOFTWARE AVAILABLE
  • APPLICATIONS
    • TFT-LCD REFERENCE DRIVERS
    • REFERENCE VOLTAGE GENERATORS
    • INDUSTRIAL PROCESS CONTROL

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

The BUF12800 is a programmable voltage reference generator designed for dynamic gamma correction in TFT-LCD panels. It provides 12 programmable outputs, each with 10-bit resolution.

TI’s new, small geometry, state-of-the-art, analog CMOS process allows the use of one digital-to-analog converter (DAC) per channel while still maintaining a very small chip size. This topology has the advantage of significantly increased programming speed over existing programmable buffers.

Programming of each output occurs through an industrystandard, two-wire serial interface. Unlike existing programmable buffers, the BUF12800 offers a highspeed, two-wire interface mode that allows clock speeds up to 3.4MHz. The BUF12800 features a double-buffered DAC register structure that significantly simplifies implementation of dynamic gamma control. This further reduces programming time, especially when many channels have to be updated simultaneously.

Reference pins set the high and low voltages of the output range. They are internally buffered, which simplifies design. They may be connected to external resistors to divide the output range for finer resolution of outputs.

The BUF12800 is available in a TSSOP-24 PowerPAD™ package. It is specified from –40°C to +85°C.

The BUF12800 is a programmable voltage reference generator designed for dynamic gamma correction in TFT-LCD panels. It provides 12 programmable outputs, each with 10-bit resolution.

TI’s new, small geometry, state-of-the-art, analog CMOS process allows the use of one digital-to-analog converter (DAC) per channel while still maintaining a very small chip size. This topology has the advantage of significantly increased programming speed over existing programmable buffers.

Programming of each output occurs through an industrystandard, two-wire serial interface. Unlike existing programmable buffers, the BUF12800 offers a highspeed, two-wire interface mode that allows clock speeds up to 3.4MHz. The BUF12800 features a double-buffered DAC register structure that significantly simplifies implementation of dynamic gamma control. This further reduces programming time, especially when many channels have to be updated simultaneously.

Reference pins set the high and low voltages of the output range. They are internally buffered, which simplifies design. They may be connected to external resistors to divide the output range for finer resolution of outputs.

The BUF12800 is available in a TSSOP-24 PowerPAD™ package. It is specified from –40°C to +85°C.

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Technical documentation

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Type Title Date
* Data sheet Reference Voltage Generator for LCD Gamma Correction datasheet (Rev. D) 05 Dec 2007
EVM User's guide BUF12800EVM User's Guide (Rev. A) 02 Aug 2016
Application note Driving Capacitive Loads with Gamma Buffers 20 Nov 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Support software

SBOC415 BUF12800EVM User Software

Supported products & hardware

Supported products & hardware

Products
LCD & OLED display power & drivers
BUF12800 12-CH Gamma-Voltage Generator
Support software

SBOC416 BUF12800EVM Source Code

Supported products & hardware

Supported products & hardware

Products
LCD & OLED display power & drivers
BUF12800 12-CH Gamma-Voltage Generator
Simulation model

Gamma Buffer I2C IBIS Model

SBOM409.ZIP (39 KB) - IBIS Model
Simulation tool

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HTSSOP (PWP) 24 Ultra Librarian

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