LM1283N ,140 MHz RGB Video Amplifier System with On-Screen Display (OSD) [Life-time buy]Featuresn Three wideband video amplifiers 140 MHz @ −3 dB(4 V output)PPBlock and Connection Diagram ..
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LM1283N
140 MHz RGB Video Amplifier System with On-Screen Display (OSD) [Life-time buy]
LM1283
140 MHz RGB Video Amplifier System with On Screen
Display (OSD)
General DescriptionThe LM1283isa fullfeature videoamplifierwith OSDinputs,
all withina 28-pin package. This partis intendedforusein
monitors with resolutionsupto 1280x 1024.The video sec-
tionofthe LM1283 features three matched video amplifiers
with blanking.Allofthe video amplifier adjustments feature
high input impedance0Vto4VDC controls, providing easy
interfacingto bus controlled alignment systems. The OSD
section features threeTTL inputsandaDC contrast control.
The switching betweenthe OSD and video sectionis con-
trolledbya single TTL input. Althoughthe OSD signalsare
TTL inputs, these signalsare internally processedto match
the OSD logiclow leveltothe video black level. Whenad-
justingthe drive controlsfor color balanceofthe videosig-
nal,the color balanceofthe OSD displaywill track these
color adjustments. The LM1283 also featuresan internal
spot killer circuitto protectthe CRT whenthe monitoris
turnedoff.For applications without OSD insertion pleasere-
fertothe LM1205or LM1208 data sheets.
Features Three wideband video amplifiers140 MHz@−3dBVPP output) TTL OSD inputs,50 MHz bandwidthOn chip blanking, outputs under0.1V when blanked Video/OSD switch speedof7ns Independent drive controlfor each channelfor color
balance0Vto4V, high impedanceDC contrast control with overdB range0Vto4V, high impedanceDC drive control(0dBto
−12dB range)0Vto4V, high impedanceDC OSD contrast control with
over40dB range Capableof6.5VPP output swing (slight reductionin
bandwidth) Output stage directly drives most hybridor discrete CRT
drivers
Applications High resolution RGB CRT monitors requiring OSD
capability
Block and Connection DiagramDS012684-1
FIGURE1. Order Number LM1283N
SeeNS Package Number N28BApril 1999
LM1283
MHz
RGB
ideo
Amplifier
System
with
Screen
Display
(OSD) 1999 National Semiconductor Corporation DS012684
