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Product details

Parameters

Display type LCD unipolar IC integration Gamma buffer, VCOM 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 interface, VCOM or op amp Rating Catalog open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

VQFN (RGW) 20 25 mm² 5 x 5 open-in-new Find other LCD & OLED display power & drivers

Features

  • 10-Bit Resolution
  • 8-Channel P-Gamma
  • 1-Channel P-VCOM
  • High Slew Rate VCOM: 45 V/µs
  • 16x Rewritable Nonvolatile Memory
  • Two Independent Pin-Selectable Memory Banks
  • Rail-to-Rail Output:
    • 300 mV Min Swing-to-Rail (10 mA)
    • > 300 mA Max IOUT
  • Low Supply Current
  • Supply Voltage: 9 V to 20 V
  • Digital Supply: 2 V to 5.5 V
  • Two-Wire Interface:
    • Supports 400 kHz and 3.4 MHz
  • 1/2 AVDD Capability
  • APPLICATIONS
    • TFT-LCD Reference Drivers

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Description

The BUF08630 offers eight programmable gamma channels and one programmable VCOM channel.

The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF08630 supports up to 16 write operations to the on-chip memory.

The BUF08630 has two separate memory banks, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves.

All gamma and VCOM channels offer a rail-to-rail output that typically swings to within 150 mV of either supply rail with a 10-mA load. All channels are programmed using a two-wire interface that supports standard operations up to 400 kHz, and high-speed data transfers up to 3.4 MHz.

The BUF08630 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 BUF08630 is available in a 20-pin QFN package, and is specified from –40°C to +95°C.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet Programmable Gamma-Voltage Generator w/Adjustable Gain Vcom & 1/2 AVDD Topology datasheet (Rev. A) Aug. 13, 2012
User guide BUF08630EVM User Guide (Rev. A) Aug. 02, 2016
Application note Driving Capacitive Loads with Gamma Buffers Nov. 20, 2012

Design & development

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Software development

SUPPORT SOFTWARE Download
SBOC430.ZIP (57357 KB)

Design tools & simulation

SIMULATION MODEL Download
SBOM428.ZIP (22 KB) - IBIS Model
SIMULATION TOOL 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
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VQFN (RGW) 20 View options

Ordering & quality

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