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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