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LM1279 Datasheet

  • LM1279

  • 110 MHz RGB Video Amplifier System with OSD

  • 537.24KB

  • 14頁(yè)

  • NSC

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LM1279 110 MHz RGB Video Amplifier System with OSD
September 1998
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.
n
n
n
n
n
n
n
n
Fast OSD switching time, typically 5 ns
3.5 kV ESD protection
Fixed cutoff level typically set to 1.35V
0V to 4V, high impedance DC contrast control with over
40 dB range
0V to 4V, high impedance DC drive control (0 dB to
鈭?2 dB range)
Matched (
鹵
0.3 dB or 3.5%) attenuators for contrast
control
Output stage directly drives CRT drivers
Ideal combination with LM2407 CRT driver
Applications
n
n
n
n
High resolution RGB CRT monitors
Video AGC amplifiers
Wideband amplifiers with contrast and drive controls
Interface amplifiers for LCD or CCD systems
Features
n
Three wideband video amplifiers 110 MHz
@
鈭?dB (4
V
PP
output)
n
OSD signal to any OSD input pin automatically switches
all 3 outputs to the OSD mode
Block and Connection Diagram
DS100091-1
FIGURE 1. Order Number LM1279N
See NS Package Number N20A
漏 1998 National Semiconductor Corporation
DS100091
www.national.com

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