Part LM1205A
Description 130MHz/85MHz RGB Video Amplifier System
Manufacturer National Semiconductor
Size 975.12 KB
National Semiconductor
LM1205A

Overview

The LM1205A/LM1207A is a very high frequency video amplifier system intended for use in high resolution RGB monitor applications. In addition to the three matched video amplifiers, the LM1205A/LM1207A contains three gated single ended input black level clamp comparators for brightness control, three matched DC controlled attenuators for contrast control, and three DC controlled sub-contrast attenuators providing gain trim capability for white balance.

  • Three wideband video amplifiers 130 MHz (LM1205A) @ -3 dB (4 VPP output)
  • Matched (±0.1 dB or 1.2%) attenuators for contrast control
  • ESD susceptibility above 3 kV
  • Three externally gated single ended input comparators for cutoff and brightness control
  • 0V to 4V, high input impedance DC contrast control (>40 dB range)
  • 0V to 4V, high input impedance DC drive control for each video amplifier (-6 dB to 0 dB range)
  • Spot killer, blanks output when VCC < 10.6V
  • Capable of 7 VPP output swing (slight reduction in bandwidth)
  • Output stage blanking
  • Output stage directly drives most hybrid or discrete CRT drivers