BUF20800数据手册TI中文资料规格书

描述 Description

The BUF20800 is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 18 programmable outputs for gamma correction and two channels for VCOM adjustment, each with 10-bit resolution. This programmability replaces the traditional, timeconsuming process of changing resistor values to optimize the various gamma voltages and allows designers to determine the correct gamma voltages for a panel very quickly. Required changes can also be easily implemented without hardware changes.

The BUF20800 uses TI’s latest, small-geometry analog CMOS process, which makes it a very competitive choice for full production, not just evaluation.

Programming of each output occurs through an industry-standard, two-wire serial interface. Unlike existing programmable buffers, the BUF20800 offers a high-speed mode that allows clock speeds up to 3.4MHz.

For lower channel count, please contact your local sales or marketing representative.

The BUF20800 is available in an HTSSOP-38 PowerPAD™ package. It is specified from –40°C to +85°C.

特性 Features

• 18-CHANNEL GAMMA CORRECTION
• 2-CHANNEL PROGRAMMABLE VCOM: 100mA IOUT
• 10-BIT RESOLUTION
• RAIL-TO-RAIL OUTPUT
• LOW SUPPLY CURRENT: 900µA/ch
• SUPPLY VOLTAGE: 7V to 18V
• DIGITAL SUPPLY: 2.0V to 5.5V
• INDUSTRY-STANDARD, TWO-WIRE INTERFACE: 3.4MHz High-Speed Mode
• HIGH ESD RATING: 4kV HBM, 1kV CDM, 200V MM
• DEMO BOARD AND SOFTWARE AVAILABLE
• APPLICATIONS
• REPLACES RESISTOR-BASED GAMMA SOLUTIONS
• TFT-LCD REFERENCE DRIVERS
• DYNAMIC GAMMA CONTROL

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