RGBDAC8E

The RGBDAC8E is a kind of hybrid digital to analog converter which provides three channels of video output for RGB type video displays with picture element (pixel) rates to 100MHz. The device contains 3 video control inputs required to generate output wave forms which are compatible with EIA standards RS-170A and RS-343. Besides, it provides 8 bits of resolution or 256 level of gray scale per color. The 256*8 RAM array per color allows the user a choice of any 256 of the 16.7 million colors for each sweep. The write speed is also high enough to allow the color map to be updated rates and the ability to generate a full 1 V composite video output accross a 75 ohm load makes this DAC ideally suited for high speed state of the art color computer graphics and CAD/CAM imaging system terms using raster scan technology.

There are some RGBDAC8E features as follows: (1)16.7 million colors; (2)update rates to 100 MHz; (3)composite video capability; (4)256*8 color map RAM; (5)small size; (6)direct 75 ohm outputs; (7)clean outputs and deglirching not required; (8)10K ECL compatible.

The following is about the RGBDAC8E specifications (typical @ +25, -5.2 V supply, 75 load U.O.S): First is about the analog outputs (each channel): (1)voltage range (±1%): 0 to -0.6375 V; (2)current (75 Ohm load): -8.5 mA; (3)impedance (±5%): 75; (4)compliance: ±1 V. Then is about the dynamic characteristics (each DAC): (1)setting time (to ±1 LSB): 8 ns; (2)update rate: (90 min) 100 MHz; (3)rise time: 3 ns; (4)slew rate: 200 V/s; (5)glitch energy: 100p V-s. The last one is about the power requirements: (1)Vee (±5%): -5.2 V; (2)Iee: -1.4 A typ and -1.9 A max; (3)-Vref (±5%): -5.2 V; (4)-Iref: -200 mA; (5)ambient temperature range: 0 to 70; (6)case temperature range: 0 to 90.