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                                                                                                                                   LM1269 110 MHz I2C Compatible RGB Video Amplifier System with OSD & DACs
                                                                                                                     May 2002




  LM1269
  110 MHz I2C Compatible RGB Video Amplifier System
  with OSD & DACs
  General Description                                             n 110 MHz bandwidth preamplifier with full video signal
                                                                    parametric control
  The LM1269 pre-amp is an integrated CMOS CRT pre-amp.
                                                                  n 4 external 8-bit DACs for bus controlled Bias and
  The IC is I2C compatible, and allows control of all the pa-
                                                                    Brightness
  rameters necessary to directly setup and adjust the gain and
                                                                  n Suitable for use with discrete or integrated clamp, with
  contrast in the CRT display. Brightness and bias can be
                                                                    software configurable Brightness mixer
  controlled through the DAC outputs, and is well matched to
  the LM2479 and LM2480 integrated bias clamp IC.                 n Power Save (Green) Mode, 80% power reduction
                                                                  n Matched to LM246X driver
  The LM1269 pre-amp is designed to work in cooperation
  with the LM246X high gain driver family.
  Black level clamping of the signal is carried out directly on   Applications
  the AC coupled input signal into the high impedance pream-      n Low end 14', 15', and 17' bus controlled monitors with
  plifier input, thus eliminating the need for additional black     OSD
  level clamp capacitors.                                         n 1024 X 768 displays up to 70 Hz requiring OSD
  The IC is packaged in an industry standard 24-lead DIP            capability
  molded plastic package.                                         n Very low cost system with LM246X driver


  Features
  n I2C compatible interface


  Block and Connection Diagram




                                                                                                             DS200099-1

                                             FIGURE 1. Order Number LM1269NA
                                                See NS Package Number N24D

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