LM1212 Datasheet | National Semiconductor

Description The LM1212 is a very high frequency video amplifier system intended for use in high resolution monochrome or RGB color monitor applications with OSD In addition to the wideband video amplifier the LM1212 contains a gated differential input black level clamp parator for brightness control a DC controlled attenuator for contrast control and a DC controlled sub contrast attenuator for drive control The DC control for the contrast attenuator is pinned out separately to provide a more accurate control system for RGB color monitor applications All DC controls offer a high input impedance and operate over a 0V- 4V range for easy interface to bus controlled alignment systems During the OSD window the output is blanked to k 0 4V The LM1212 operates from a nominal 12V supply but can be operated with supply voltages down to 8V for applications that require reduced IC package power dissipation characteristics Externally gated parator for brightness control 0V to 4V high input impedance DC contrast control (l 40 d B range) 0V to 4V high input impedance DC drive control ( g 3 d B range) Ouput blanked to k 0 4V for OSD window Easy to parallel three LM1212s for optimum color tracking in RGB systems Output stage clamps to 0 65V and provides up to 9V output voltage swing Output stage directly drives most hybrid or discrete CRT amplifier stages Applications Features High resolution CRT monitors with OSD Video switches Video AGC amplifier Wideband amplifier with gain and DC offset control Wideband video amplifier (fb3 d B e 230 MHz at VO e 4 VPP) tr tf e 1 5 ns at VO e 4 VPP Block and Connection Diagram TL H 12354 - 1 Order Number LM1212N See NS Package Number N20A C1996 National Semiconductor Corporation TL H 12354 RRD-B30M86 Printed in U S A http national Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and...