LM1262 Datasheet | National Semiconductor

Description The LM1262 pre-amp is an integrated CMOS CRT pre-amp. The IC is I2C patible, 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. n 4 external 8-bit DACs for bus controlled Bias and Brightness n Vertical blank from sandcastle or input at pin 13 OR’ed with horz. blank signal, option selected by I2C n Contrast and brightness updates synchronous with vertical blank, enabled by I2C n Video set to black level through I2C 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 11-lead LM246X driver Applications n High end 19” and 21” bus controlled monitors with OSD n 1600 X 1200, 85 Hz or higher applications n Low cost and high performance system with LM246X driver Features n I2C patible interface Block and Connection Diagram DS200404-1 FIGURE 1. Order Number LM1262NA See NS Package Number N24D © 2002 National Semiconductor Corporation DS200404 .national. Absolute Maximum Ratings (Notes 1, 3) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage, Pin 9 Peak Video Output Source Current (Any One Amp) Pins 18, 19, or 20 Voltage at Any Input Pin (VIN) Power Dissipation (PD) (Above 25˚C Derate based on θJA and TJ) Thermal Resistance to Ambient (θJA)...