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Product details

Parameters

Display type LCD Unipolar IC integration Gamma Buffer Vin (Min) (V) 7 Vin (Max) (V) 18 Source driver voltage (Min) (V) 7 Source driver voltage (Max) (V) 18 Level shifter/scan driver (ch) 0 Special function I2C I/F, Gamma Buffer Topology Type Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

HTSSOP (PWP) 24 34 mm² 4.4 x 7.8 open-in-new Find other LCD & OLED display power & drivers

Features

  • 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.

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Description

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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Download

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet Reference Voltage Generator for LCD Gamma Correction datasheet (Rev. D) Dec. 05, 2007
User guides BUF12800EVM User's Guide (Rev. A) Aug. 02, 2016
Technical articles A New Understanding: Blast Motion redefines movement, tracking and training for athletes. Aug. 06, 2014
Technical articles Improving Fly-Buck Regulation Using Opto (Part-1) Jul. 15, 2014
Technical articles Altium and WEBENCH – together at last Jul. 12, 2014
Technical articles Using telemetry in point-of-load applications Jun. 24, 2014
Application notes Driving Capacitive Loads with Gamma Buffers Nov. 20, 2012

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$149.00
Description

The BUF08821EVM is a platform for evaluating the performance of the BUF08821 gamma-voltage generator under various signal, reference and supply conditions. This device offers 12 programmable gamma channels, each with 10 bit resolution.

Features
  • Easy to use Hardware and Software interface
  • DUT socket for easy part replacement
  • Soldered part for high power/temperature evaluation
  • External connectors provide additional flexiblity

Software development

SUPPORT SOFTWARE Download
SBOC415.ZIP (54440 KB)
SUPPORT SOFTWARE Download
SBOC416.ZIP (2071 KB)

Design tools & simulation

SIMULATION MODELS Download
SBOM409.ZIP (39 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 24 View options

Ordering & quality

Support & training

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