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12-Channel, 10-Bit Programmable Gamma and VCOM Reference Voltages

Industry's Most Accurate Gamma Curve Reference System

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 12 Channels of Programmable Gamma Voltages with 10-Bit Resolution
  • Programmable VCOM Voltage with 10-Bit Resolution
  • Programmable Reference for DACs
  • Multiple-Time Programmable Memory to Store Gamma and VCOM Codes
  • Switching Between Two Gamma Curves and VCOM Voltages
  • AVDD1, AVDD2, and AVDD_AMP Supplies to Reduce Heat
  • I²C Interface (1MHz Fast-Mode Plus)

Applications/Uses

  • TFT LCDs

Description

The MAX9679 provides multiple programmable reference voltages for gamma correction in TFT LCDs and a programmable reference voltage for VCOM adjustment. All gamma and VCOM reference voltages have a 10-bit digital-to-analog converter (DAC) and high-current buffer, which reduces the recovery time of the output voltages when critical levels and patterns are displayed. A programmable internal reference sets the full-scale voltage of the DACs.

Two independent sets of gamma curves and VCOM codes can be stored in the IC's volatile memory; BKSEL signal selects between the two sets.

The IC has multiple-time programmable (MTP) memory to store gamma and VCOM codes on the chip, eliminating the need for external EEPROM.

Simplified Block Diagram

MAX9679: Simplified Block Diagram MAX9679: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .