DS3514 I2C Gamma and VCOM Buffer with EEPROM ? DS3514 Description COM voltage generator that supports both real-time updating as well as multibyte storage of gamma/V_COM data in on-chip EEPROM memory. An independent 10-bit DAC, two 10-bit data registers, and four words of EEPROM memory are provided for each individually addressable gamma or V_COM channel. High-performance buffer amplifiers are integrated on-chip, providing rail-to-rail, low-power (400μA/gamma channel) operation. The V_COM channel features a high current drive (> 250mA peak) and a fast-settling buffer amplifier optimized to drive the V_COM node of a wide range of TFT-LCD panels.

Programming occurs through an I2C-compatible serial interface. Interface performance and flexibility are enhanced by a pair of independently loaded data latches per channel, as well as support for I2C speeds up to 400kHz. The multitable EEPROM memory enables a rich variety of display system enhancements, including support for temperature or light-level dependent gamma tables, enabling of factory or field automated display adjustment, and support for backlight dimming algorithms to reduce system power. Upon power-up and depending on mode, DAC data is selected from EEPROM by the S0/S1 pins or from a fixed memory address. DS3514 pdf datasheet DS3514 Key Features

10-Bit Gamma Buffers, 14 Channels

8-Bit V_COM Buffer, 1 Channel

Four 10-bit EEPROM Words per Channel

Low-Power 400 μA/ch Gamma Buffers

I2C-Compatible Serial Interface

Flexible Control from I2C or Pins

9.0V to 15.0V Analog Supply

2.7V to 5.5V Digital Supply

48-Pin TQFN Package (7mm x 7mm)

DS3514 Applications/Uses

Adaptive Gamma and VCOM Adjustment (Real Time by I2C, Select EEPROM Through I2C or S0/S1 Pins
	Industrial Process Control
	TFT-LCD Gamma and VCOM Buffer