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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