LM1204 Datasheet | National Semiconductor

Description The LM1204 is a triple 150 MHz video amplifier system designed specifically for high resolution RGB video display applications In addition to three matched video amplifiers the LM1204 contains a DC operated contrast control a DC operated drive control for each amplifier and a dual clamping system for both brightness control and video blanking The LM1204 also contains a back porch clamp pulse generator which is activated by an externally supplied g H HV sync signal or by an external posite video signal The g H HV sync input will have priority over the posite video input A single b H HV sync output is provided for the automatically selected sync input signal The back porch clamp pulse width is user adjustable from 0 3 ms to 4 ms The LM1204 video output stage will directly drive most Hybrid or discrete CRT amplfier input stages without the need for an external buffer transistor The device has been designed to operate from a 12V supply with all DC controls operating over a 0V to 4V range providing for an easy interface to serial digital buss controlled monitors Features Y Y Y Y Y Built-in video blanking function Built-in sync separator for posite video input Includes DC restoration of video signals Back porch clamp pulse width user adjustable DC control of brightness contrast blanking level drive and cutoff DC controls are 0V to 4V for easy interfacing to a digitally controlled system Key Specifications 150 MHz large signal bandwidth (typ) 2 3 ns rise fall times (typ) 0 1 d B contrast tracking (typ) g 3 d B drive (D gain) adjustments on R G B channels (typ) Applications High resolution CRT monitors Video AGC amplifier Wideband amplifier with gain and DC offset control Block Diagram and Connection Diagram Top View TL H 11238 - 1 Ordering Information Order Number LM1204V See NS Package Number V44A C1995 National Semiconductor Corporation TL H 11238 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Note 1) Thermal Resistance i JA...