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Part Number: BUF20800
Description: The BUF20800 is a programmable voltage reference generator designed for gamma correction in TFT-LCD pa...
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BUF20800
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DataSheet
General Description
BUF20800 General 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 industrystandard,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.
BUF20800 Maximum Ratings
Supply Voltage, VS . . . . . . . . . . . . . . . . . . . . . . . . . +19V
Supply Voltage, VSD . . . . . . . . . . . . . . . . . . . . . . . . . +6V
Signal Input Terminals, SCL, SDA, AO, LD: Voltage . . −0.5V to +6V
Current . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . ±10mA
Output Short Circuit(2) . . . . . . . . . . . . . . . . . .Continuous
Operating Temperature . . . . . . . . . . . . .−40°C to +95°C
Storage Temperature . . . . . . . . . . . . .−65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . .+125°C
Lead Temperature (soldering, 10s) . . . . . . . . . . +300°C
ESD Rating:
Human Body Model (HBM) . . . . . . . . . . . . . . . . . . . . . 4kV
Charged-Device Model (CDM) . . . . . . . . . . . . . . . . . . . 1kV
Machine Model (MM) . . . . . . . . . . . . . . . . . . . . . . . . . 200V
Supply Voltage, VSD . . . . . . . . . . . . . . . . . . . . . . . . . +6V
Signal Input Terminals, SCL, SDA, AO, LD: Voltage . . −0.5V to +6V
Current . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . ±10mA
Output Short Circuit(2) . . . . . . . . . . . . . . . . . .Continuous
Operating Temperature . . . . . . . . . . . . .−40°C to +95°C
Storage Temperature . . . . . . . . . . . . .−65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . .+125°C
Lead Temperature (soldering, 10s) . . . . . . . . . . +300°C
ESD Rating:
Human Body Model (HBM) . . . . . . . . . . . . . . . . . . . . . 4kV
Charged-Device Model (CDM) . . . . . . . . . . . . . . . . . . . 1kV
Machine Model (MM) . . . . . . . . . . . . . . . . . . . . . . . . . 200V
BUF20800 Features
` 18-CHANNEL GAMMA CORRECTION
` 2-CHANNEL PROGRAMMABLE VCOM:100mA IOUT
` 10-BIT RESOLUTION
` RAIL-TO-RAIL OUTPUT
` LOW SUPPLY CURRENT: 900A/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
` 2-CHANNEL PROGRAMMABLE VCOM:100mA IOUT
` 10-BIT RESOLUTION
` RAIL-TO-RAIL OUTPUT
` LOW SUPPLY CURRENT: 900A/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
BUF20800 Typical Application
· REPLACES RESISTOR-BASED GAMMA SOLUTIONS
· TFT-LCD REFERENCE DRIVERS
· DYNAMIC GAMMA CONTROL
· TFT-LCD REFERENCE DRIVERS
· DYNAMIC GAMMA CONTROL
BUF20800
PDF/DataSheet Download
- Datasheet: BUF20800
- File Size: 458752 KB
- Manufacturer: TI
- Click here to Download
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