BUF20800

具有两条可编程 VCOM 通道的 18 通道伽马电压生成器

The 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 ’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.

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18-CHANNEL GAMMA CORRECTION

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2-CHANNEL PROGRAMMABLE VCOM:

100mA IOUT

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10-BIT RESOLUTION

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RAIL-TO-RAIL OUTPUT

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LOW SUPPLY CURRENT: 900µA/ch

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SUPPLY VOLTAGE: 7V to 18V

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DIGITAL SUPPLY: 2.0V to 5.5V

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INDUSTRY-STANDARD, TWO-WIRE INTERFACE:

3.4MHz High-Speed Mode

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HIGH ESD RATING:

4kV HBM, 1kV CDM, 200V MM

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DEMO BOARD AND SOFTWARE AVAILABLE

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APPLICATIONS

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REPLACES RESISTOR-BASED GAMMA SOLUTIONS

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TFT-LCD REFERENCE DRIVERS

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DYNAMIC GAMMA CONTROL

PowerPAD is a registered trademark of Texas Instruments.

All other trademarks are the property of their respective owners.