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Home » NEWEST Products » New by Manufacturer » Texas Instruments » BUF20800 18-Ch Gamma Voltage Generator - TI
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Texas Instruments BUF20800 18-Channel Gamma Voltage Generator

Texas Instruments BUF20800 18-Channel
Gamma Voltage Generator

Texas Instrument's BUF20800 18-Channel Gamma Voltage Generator 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 VCOM adjustment, each with 10-bit resolution. This programmability replaces the traditional, time consuming 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.

  • Qualified for Automotive Applications
  • 18-Channel Gamma Correction
  • 2-Channel Programmable VCOM: 50mA IOUT
  • 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
  • Demo Board and Software Available
  • Replaces Resistor-Based Gamma Solutions
  • TFT-LCD Reference Drivers
  • Dynamic Gamma Control
Block Diagram
Block Diagram
  • Texas Instruments