ADV453 Datasheet | Analog Devices

FEATURES 66 MHz Pipelined Operation Triple 8-Bit D/A Converters 256؋24 Color Palette RAM 3؋24 Overlay Registers RS-343A/RS-170 patible Outputs ؉5 V CMOS Monolithic Construction 40-Pin DIP or Small 44-Pin PLCC Package Power Dissipation: 1000 m W APPLICATIONS High Resolution Color Graphics CAE/CAD/CAM Applications Image Processing Instrumentation Desktop Publishing AVAILABLE CLOCK RATES 66 MHz 40 MHz GENERAL DESCRIPTION The ADV453 is a plete analog video output RAM-DAC on a single monolithic chip. It is specifically designed for high resolution color graphics systems. The part contains a 256 ϫ 24 color lookup table, a 3 ϫ 24 overlay palette as well as triple 8-bit video D/A converters. The ADV453 is capable of simultaneously displaying up to 259 colors, 256 from the lookup table and three from the overlay registers, out of a total color palette of 16.8 million addressable colors. The three overlay registers allow for implementation of overlaying cursors, pull down menus and grids. There is an independent, asynchronous MPU bus which allows access to the color lookup table without affecting the input of video data via the pixel port. The ADV453 is capable of generating RGB video output signals which are patible with RS-343A and RS-170 video standards, without requiring external buffering. The ADV453 is fabricated in a +5 V CMOS process. Its monolithic CMOS construction ensures greater functionality with low power dissipation. The part is packaged in both a 0.6", 40-pin DIP and a 44-pin plastic leaded (J-lead) chip carrier, PLCC. FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS 1. Fast video refresh rate, 66 MHz. 2. patible with a wide variety of high resolution color graphics systems including VGA- and Macintosh II.- - 3. Three overlay registers allow for implementation of overlay- ing cursors, pull down menus and grids. 4. Guaranteed monotonic. Integral and differential nonlineari- ties guaranteed to be a maximum of ± 1 LSB. 5. Low glitch energy, 50 p V secs. - - VGA is a...