The BUF12800 is a programmable voltage reference generator designed for dynamic gamma correction in TFT-LCD panels. It provides 12 programmable outputs, each with 10-bit resolution.

TI’s new, small geometry, state-of-the-art, analog CMOS process allows the use of one digital-to-analog converter (DAC) per channel while still maintaining a very small chip size. This topology has the advantage of significantly increased programming speed over existing programmable buffers.

Programming of each output occurs through an industrystandard, two-wire serial interface. Unlike existing programmable buffers, the BUF12800 offers a highspeed, two-wire interface mode that allows clock speeds up to 3.4MHz. The BUF12800 features a double-buffered DAC register structure that significantly simplifies implementation of dynamic gamma control. This further reduces programming time, especially when many channels have to be updated simultaneously.

Reference pins set the high and low voltages of the output range. They are internally buffered, which simplifies design. They may be connected to external resistors to divide the output range for finer resolution of outputs.

The BUF12800 is available in a TSSOP-24 PowerPAD™ package. It is specified from –40°C to +85°C.

• 12-CHANNEL GAMMA CORRECTION
• 10-BIT RESOLUTION
• DOUBLE-BUFFERED DAC REGISTERS
• INTEGRATED REFERENCE BUFFERS
• RAIL-TO-RAIL OUTPUT
• LOW SUPPLY CURRENT: 900μA/ch
• SUPPLY VOLTAGE: 7V to 18V
• DIGITAL SUPPLY: 2.3V to 5.5V
• INDUSTRY-STANDARD TWO-WIRE INTERFACE
  • High-Speed Mode: 3.4MHz
• HIGH ESD RATING:
  • 4kV HBM, 1kV CDM, 200V MM
• DEMO BOARD AND SOFTWARE AVAILABLE
• APPLICATIONS
  • TFT-LCD REFERENCE DRIVERS
  • REFERENCE VOLTAGE GENERATORS
  • INDUSTRIAL PROCESS CONTROL

PowerPAD is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners.

• Display type
• LCD unipolar
• IC integration
• Gamma buffer
• Vin (Min) (V)
• 7
• Vin (Max) (V)
• 18
• Source driver voltage (Min) (V)
• 7
• Source driver voltage (Max) (V)
• 18
• Level shifter/scan driver (ch)
• 0
• Features
• Gamma buffer, I2C interface
• Rating
• Catalog

BUF12800的完整型号有：BUF12800AIPWP、BUF12800AIPWPR，以下是这些产品的关键参数及官网采购报价：

BUF12800AIPWP，工作温度：-40 to 85，封装：HTSSOP (PWP)-24，包装数量MPQ：60个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BUF12800AIPWP的批量USD价格：2.148（1000+）

BUF12800AIPWPR，工作温度：-40 to 85，封装：HTSSOP (PWP)-24，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BUF12800AIPWPR的批量USD价格：1.804（1000+）

BUF12800EVM — BUF12800 评估模块

BUF08821EVM 是用于在各种信号、基准和电源条件下评估 BUF08821 伽马电压发生器性能的一个平台。该设备提供 12 个可编程的伽马通道，每个通道都拥有 10 位分辨率。

BUF12800EVM User Software

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