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LT6550 LT6550

Design Notes

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  Video Signal Distribution Using Low Supply Voltage Amplifiers &mdash DN327
  PDF, 93 Kb, File published: Dec 1, 2003
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  Video Signal Distribution Using Low Supply Voltage Amplifiers
  Design Note 327
  Jon Munson
  Introduction
  Video designs are often pressed to operate on the lowest
  possible rail voltages—a simple result of the trend towards lower voltage logic and the advantages of sharing
  supply potentials wherever possible. Video designs are
  further complicated by the need to accommodate the
  dynamic offset variation inherent in AC-coupled designs
  as picture content varies. Traditional op amps require
  relatively large amounts of output-swing headroom and
  are therefore impractical for AC coupling at even 5V.
  Linear Technology offers a new family of video op amps
  which addresses these issues and offers the ability to
  operate down to 3.3V in most instances. This family
  includes the LTВ®6205 (single), LT6206 (dual), LT6207
  (quad), LT6550 (triple, п¬Ѓxed gain of 2) and LT6551
  (quad, п¬Ѓxed gain of 2).
  Video Signal Characteristics
  To determine the minimum video amplifier supply voltage, we must first examine the nature of the signal.
  Composite video is the most commonly used signal
  in broadcast-grade products and combines Luma (or
  luminance, the intensity information), Chroma (the colorimetry information) and Sync (vertical and horizontal …

Articles

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  Video Signal Distribution Using Low Supply-Voltage Amplifiers &mdash LT Journal
  PDF, 164 Kb, File published: Dec 1, 2003
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  DESIGN IDEAS Video Signal Distribution Using
  Low Supply-Voltage Amplifiers
  by Jon Munson Introduction
  Video designs are often pressed to
  operate on the lowest possible rail
  voltages—a simple result of the trend
  towards lower voltage logic and the
  advantages of sharing supply potentials wherever possible. Video designs
  are further complicated by the need
  to accommodate the dynamic offset
  variation inherent in AC-coupled
  designs as picture content varies.
  Traditional op amps require relatively
  large amounts of output-swing headroom and are therefore impractical for
  AC coupling at even 5V. Linear Technology offers a new family of video op
  amps which addresses these issues
  and offers the ability to operate down
  to 3.3V in most instances. This family
  includes the LT6205 (single), LT6206
  (dual), LT6207 (quad), LT6550 (triple,
  fixed gain of 2), and LT6551 (quad,
  fixed gain of 2). Video Signal Characteristics
  To determine the minimum video amplifier supply voltage, we must first …

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  Triple and Quad RGB Amplifiers Deliver Full Performance on 3.3V &mdash LT Journal
  PDF, 301 Kb, File published: Mar 1, 2003
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  DESIGN FEATURES Triple and Quad RGB Amplifiers
  Deliver Full Performance on 3.3V
  by Jon Munson and Raj Ramchandani
  Introduction Amplifier Characteristics
  The block diagrams in Figure 1 show
  the differences between the LT6550
  and LT6551. The LT6551 quad is
  designed for single supply operation
  with the feedback returned to ground.
  The LT6550 triple has a separate VEE
  pin and can be used on either single
  or split supplies.
  These devices feature internal feedback resistors and a flow-thru pin out,
  Linear Technology Magazine March 2003 IN1 450Ω 450Ω 450Ω IN1 VCC IN2 450Ω 450Ω –
  OA
  + OUT1 450Ω IN2 –
  OA
  + IN3 450Ω 450Ω 450Ω
  VCC –
  OA
  + OUT1 450Ω
  –
  OA …

Model Line

Manufacturer's Classification

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Voltage Amplifiers (>12V) | High Speed Amplifiers (GBW > 50MHz) | Rail-to-Rail Amplifiers

Other Names:

LT6551CMSPBF, LT6551CMS PBF