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LM1283N Datasheet

  • LM1283N

  • National Semiconductor [140 MHz RGB Video Amplifier System ...

  • NSC

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LM1283 140 MHz RGB Video Amplifier System with On Screen Display (OSD)
April 1999
LM1283
140 MHz RGB Video Amplifier System with On Screen
Display (OSD)
General Description
The LM1283 is a full feature video amplifier with OSD inputs,
all within a 28-pin package. This part is intended for use in
monitors with resolutions up to 1280 x 1024. The video sec-
tion of the LM1283 features three matched video amplifiers
with blanking. All of the video amplifier adjustments feature
high input impedance 0V to 4V DC controls, providing easy
interfacing to bus controlled alignment systems. The OSD
section features three TTL inputs and a DC contrast control.
The switching between the OSD and video section is con-
trolled by a single TTL input. Although the OSD signals are
TTL inputs, these signals are internally processed to match
the OSD logic low level to the video black level. When ad-
justing the drive controls for color balance of the video sig-
nal, the color balance of the OSD display will track these
color adjustments. The LM1283 also features an internal
spot killer circuit to protect the CRT when the monitor is
turned off. For applications without OSD insertion please re-
fer to the LM1205 or LM1208 data sheets.
n
n
n
n
n
n
n
n
n
TTL OSD inputs, 50 MHz bandwidth
On chip blanking, outputs under 0.1 V when blanked
Video/OSD switch speed of 7 ns
Independent drive control for each channel for color
balance
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)
0V to 4V, high impedance DC OSD contrast control with
over 40 dB range
Capable of 6.5 V
PP
output swing (slight reduction in
bandwidth)
Output stage directly drives most hybrid or discrete CRT
drivers
Applications
n
High resolution RGB CRT monitors requiring OSD
capability
Features
n
Three wideband video amplifiers 140 MHz
@
鈭? dB
(4 V
PP
output)
Block and Connection Diagram
DS012684-1
FIGURE 1. Order Number LM1283N
See NS Package Number N28B
漏 1999 National Semiconductor Corporation
DS012684
www.national.com

LM1283N 產(chǎn)品屬性

  • 13

  • 集成電路 (IC)

  • 線性 - 放大器 - 視頻放大器和頻緩沖器

  • -

  • 通用

  • -

  • 3

  • 140MHz

  • -

  • 85mA

  • 28mA

  • 11.4 V ~ 12.6 V

  • 通孔

  • 28-DIP（0.600"，15.24mm）

  • 28-DIP

  • 管件

  • *LM1283N

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