LM1262  Product Folder

The LM1262 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 LM1262 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.

• I²C compatible interface
• 4 external 8-bit DACs for bus controlled Bias and Brightness
• Vertical blank from sandcastle or input at pin 13 OR'ed with horz. blank signal, option selected by I²C
• Contrast and brightness updates synchronous with vertical blank, enabled by I²C
• Video set to black level through I²C
• Suitable for use with discrete or integrated clamp, with software configurable Brightness mixer
• Power Save (Green) Mode, 80% power reduction
• Matched to 11-lead LM246X driver

• High end 19" and 21" bus controlled monitors with OSD
• 1600 X 1200, 85 Hz or higher applications
• Low cost and high performance system with LM246X driver