BUF20800 Datasheet | Burr-Brown

FEATURES D 18-CHANNEL GAMMA CORRECTION D 2-CHANNEL PROGRAMMABLE V: 100m A IOUT D 10-BIT RESOLUTION D RAIL-TO-RAIL OUTPUT D LOW SUPPLY CURRENT: 900µA/ch D SUPPLY VOLTAGE: 7V to 18V D DIGITAL SUPPLY: 2.0V to 5.5V D INDUSTRY-STANDARD, TWO-WIRE INTERFACE: 3.4MHz High-Speed Mode D HIGH ESD RATING: 4k V HBM, 1k V CDM, 200V MM D DEMO BOARD AND SOFTWARE AVAILABLE Analog (7V to 18V) Digital (2.0V to 5.5V) REFH REFH OUT VCO M OUT1 VCO M OUT2 DAC Registers … DAC Registers … OUT 1 OUT 2 18 Output Channels plus Two V Channels OUT 17 SDA SCL Control IF REFL OUT 18 REFL OUT APPLICATIONS D REPLACES RESISTOR-BASED GAMMA SOLUTIONS D TFT-LCD REFERENCE DRIVERS D DYNAMIC GAMMA CONTROL 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 V 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 petitive 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 Power PAD package. It is specified from - 40°C to +85°C. BUF20800 RELATED PRODUCTS FEATURES 18-Channel Programmable, Two V + OTP Memory 12-Channel Programmable Buffer, 10-Bit Programmable V 11-, 6-, 4-Channel Gamma Correction Buffer, 18V Supply High-Speed V, 1 and 2 Channels...