LM1267

LM1267 150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs May 2002 LM1267 150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs General Description The LM1267 pre-amp is an integrated CMOS CRT pre-amp. The IC is I2C compatible, and allows control of all the parameters necessary to directly setup and adjust the gain and contrast in the CRT display. Brightness and bias can be controlled through the DAC outputs, and is well matched to the LM2479 and LM2480 integrated bias clamp IC. The LM1267 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 the AC coupled input signal into the high impedance preamplifier input, thus eliminating the need for additional black level clamp capacitors. The IC is packaged in an industry standard 24-lead DIP molded plastic package. n Programmable 110 MHz to 150 MHz bandwidth preamplifier with full video signal parametric control n 4 external 8-bit DACs for bus controlled Bias and Brightness n Suitable for use with discrete or integrated clamp, with software configurable Brightness mixer n Power Save (Green) Mode, 80% power reduction n Matched to LM246X driver Applications n Low end 15’ and 17’ bus controlled monitors with OSD n 1024 X 768 displays up to 85 Hz requiring OSD capability n Very low cost system with LM246X driver Features n I2C compatible interface Block and Connection Diagram DS200050-1 FIGURE 1. Order Numb...