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LM1279 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM1279
Description  110 MHz RGB Video Amplifier System with OSD
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM1279 Datasheet(HTML) 1 Page - National Semiconductor (TI)

 
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LM1279
110 MHz RGB Video Amplifier System with OSD
General Description
The LM1279 is a full featured and low cost video amplifier
with OSD (On Screen Display). 8V operation for low power
and increased reliability. Supplied in a 20-pin DIP package,
accommodating very compact designs of the video channel
requiring OSD. All video functions controlled by 0V to 4V
high impedance DC inputs. This provides easy interfacing to
5V DACs used in computer controlled systems and digital
alignment systems. Unique OSD switching, no OSD switch-
ing signal required. An OSD signal at any OSD input typically
switches the LM1279 to the OSD mode within 5 ns. Ideal
video amplifier for the low cost OSD monitor with resolutions
up to 1280 x 1024. The LM1279 provides superior protection
against ESD. Excellent alternative for the MC13282 in new
designs.
Features
n Three wideband video amplifiers 110 MHz @ −3dB (4
V
PP output)
n OSD signal to any OSD input pin automatically switches
all 3 outputs to the OSD mode
n Fast OSD switching time, typically 5 ns
n 3.5 kV ESD protection
n Fixed cutoff level typically set to 1.35V
n 0V to 4V, high impedance DC contrast control with over
40 dB range
n 0V to 4V, high impedance DC drive control (0 dB to
−12 dB range)
n Matched (±0.3 dB or 3.5%) attenuators for contrast
control
n Output stage directly drives CRT drivers
n Ideal combination with LM2407 CRT driver
Applications
n High resolution RGB CRT monitors
n Video AGC amplifiers
n Wideband amplifiers with contrast and drive controls
n Interface amplifiers for LCD or CCD systems
Block and Connection Diagram
DS100091-1
FIGURE 1. Order Number LM1279N
See NS Package Number N20A
September 1998
© 1998 National Semiconductor Corporation
DS100091
www.national.com


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