BUF20800
- 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.
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.
Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | 18-Channel, Gamma Voltage Generator with Two Programmable Vcom Channels datasheet (Rev. E) | 05 Dec 2007 | |
| Application note | Driving Capacitive Loads with Gamma Buffers | 20 Nov 2012 | ||
| EVM User's guide | BUF20800/BUF20820EVM User Guide | 08 Apr 2011 |
Design & development
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INA271 TINA-TI Reference Design (Rev. B)
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (DCP) | 38 | Ultra Librarian |
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