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Product details

Parameters

Display type LCD Unipolar IC integration Gamma Buffer Vin (Min) (V) 9 Vin (Max) (V) 20 Source driver voltage (Min) (V) 9 Source driver voltage (Max) (V) 20 Level shifter/scan driver (ch) 0 Special function Gamma Buffer, I2C I/F Topology Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other LCD & OLED display power & drivers

Features

  • 10-BIT RESOLUTION
  • 12-CHANNEL P-GAMMA
  • READS FROM EXTERNAL EEPROM
  • TWO INDEPENDENT PIN-SELECTABLE MEMORY BANKS
  • RAIL-TO-RAIL OUTPUT:
    • 300mV Min Swing-to-Rail (10mA)
    • 200mV Min Swing-to-Rail (5mA)
  • LOW SUPPLY CURRENT
  • SUPPLY VOLTAGE: 9V to 20V
  • DIGITAL SUPPLY: 2V to 5.5V
  • TWO-WIRE INTERFACE: Supports 400kHz and 3.4MHz Operation
  • APPLICATIONS
    • TFT-LCD REFERENCE DRIVERS

All other trademarks are the property of their respective owners

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Description

The BUF12840 offers 12 programmable gamma channels with external electrically erasable programmable read-only memory (EEPROM) read capabilities.

The BUF12840 has two separate memory banks that allow simultaneous storage of two different gamma curves to facilitate switching between gamma curves.

All gamma channels offer a rail-to-rail output that typically swings to within 200mV of either supply rail with a 5mA load. All channels are programmed using a two-wire interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz.

The BUF12840 is manufactured using Texas Instruments’ proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and high supply voltage operation of up to 20V. The BUF12840 is offered in a QFN-24 package, and is specified from –40°C to +95°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet Prog Gamma-Voltage Generator w/ Integrated 2-Bank Memory & External EEPROM datasheet (Rev. A) Jul. 12, 2011
User guides BUF12840EVM User Guide (Rev. A) May 31, 2016
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013
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
Description

The BUF12840EVM is a platform for evaluating the performance of the BUF12840 under various signal, reference, and supply conditions.

Features
  • Easy to use hardware and software.
  • DUT socket allows screening/programming of many parts
  • DIP Adapter/Daughter board for thermal evaluation
  • External connections for stand alone applications

Software development

SUPPORT SOFTWARE Download
SBOC431.ZIP (92993 KB)

Design tools & simulation

SIMULATION MODELS Download
SBOM429.ZIP (20 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
VQFN (RGE) 24 View options

Ordering & quality

Support & training

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