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MAX9667

Obsolete

6/8/10-Channel, 10-Bit, Nonvolatile Programmable Gamma and VCOM Reference Voltages

Integrated Nonvolatile Programmable Gamma and VCOM Reference System for LCDs

Data Sheet (Rev. 4) Product Selection Table

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Overview

6/8/10 Channels Gamma Correction, 10-Bit Resolution
VCOM Driver
Integrated Multiple-Time Programmable Memory
DAC Reference Input
Single-Wire and I²C Programming of VCOM Reference
950mA Peak Transient Current on VCOM Channel

The MAX9665/MAX9666/MAX9667 provide 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 buffer with high peak current. This reduces the recovery time of the output voltage when critical levels and patterns are displayed.

These devices include multiple-time programmable (MTP) memory to store gamma and VCOM codes on the chip, eliminating the need for external EEPROM. The MTP memory supports up to 300 write operations.

The MAX9665/MAX9666/MAX9667 feature an I²C interface to control the programmable reference voltages and a single-wire interface to toggle the VCOM reference voltage up or down.

Applications