I²C Gamma and V_COM Buffer with EEPROM

 

Part Number	Replacement	Explanation

Description

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The DS3510 is a programmable gamma and V_COM voltage generator which supports both real-time updating as well as multibyte storage of gamma/V_COM data in on-chip EEPROM memory. An independent 8-bit DAC, two 8-bit data registers, and 4 bytes 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 registers 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 pads or from a fixed memory address.

DS3510: Typical Operating Circuit Enlarge+

Key Features

• 8-Bit Gamma Buffers, 10 Channels
• 8-Bit V_COM Buffer, 1 Channel
• 4 EEPROM Bytes per Channel
• Low-Power 400µA/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 Package (TQFN 7mm x 7mm)

Applications/Uses

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