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Triple Video Line Driver (DC Coupled)

2014-12-09 14:56  
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View Full Size Image View Original Application NoteTriple Video Line Driver (DC Coupled)

In DC-coupled systems, the video swings are fixed in relation to the supplies used, so back-terminated cable drivers need only provide 2V of output range when optimally biased. In most cases, this permits operation on lower power supply potential(s) than with AC-coupling (unclamped mode). Generally DC-coupled circuits use split supply potentials since the waveforms often include or pass through zero volts. For single supply operation, the inputs need to have an appropriate offset applied to preserve linear amplifier operation over the intended signal swing. The LT6553 includes on-chip gain-setting resistors and flow-through layout that is optimal for HD and RGB wideband video applications.




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