LM1262 National Semiconductor, LM1262 Datasheet
LM1262
Manufacturer Part Number
LM1262
Description
200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
Manufacturer
National Semiconductor
Datasheet
1.LM1262.pdf
(20 pages)
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© 2002 National Semiconductor Corporation
LM1262
200 MHz I
with OSD and DACs
General Description
The LM1262 pre-amp is an integrated CMOS CRT pre-amp.
The IC is I
rameters 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 pream-
plifier 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.
Features
n I
Block and Connection Diagram
2
C compatible interface
2
C compatible, and allows control of all the pa-
2
C Compatible RGB Video Amplifier System
DS200404
FIGURE 1. Order Number LM1262NA
See NS Package Number N24D
n 4 external 8-bit DACs for bus controlled Bias and
n Vertical blank from sandcastle or input at pin 13 OR’ed
n Contrast and brightness updates synchronous with
n Video set to black level through I
n Suitable for use with discrete or integrated clamp, with
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
Brightness
with horz. blank signal, option selected by I
vertical blank, enabled by I
software configurable Brightness mixer
driver
2
C
2
C
DS200404-1
2
www.national.com
C
March 2002
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