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LT1675

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• 下载
  Tiny RGB Video Multiplexer Switches Pixels at 100MHz &mdash DN205
  PDF, 84 Kb, 档案已发布: May 1, 1999
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  Tiny RGB Video Multiplexer Switches Pixels at 100MHz
  Design Note 205
  Frank Cox and John Wright
  Introduction
  The LTВ®1675, a new 3-channel, 2-input 250MHz video
  multiplexer, is designed for pixel switching, video graphics and RGB routing. The complete circuit squeezes
  into a 16-lead SSOP package and uses only 0.25in2 of
  PC board area (Figure 1). The LT1675 features a п¬Ѓxed
  gain of 2 for driving double-terminated cables. By
  incorporating internal feedback resistors, the circuit
  simplifies PC board layout and boosts performance
  by eliminating stray capacitance. A single channel 2:1
  MUX, the LT1675-1 is available in the small MSOP
  package. Table 1 summarizes the major performance
  specifications of this new multiplexer, and Figure 2
  shows a typical application: switching between two
  RGB sources. Figure 1. Board Photo Actual Size
  Table 1. LT1675 Performance, VS = В±5V
  PARAMETER CONDITIONS TYPICAL
  VALUES –3dB Bandwidth RL = 150Ω 250MHz 0.1dB Gain Flatness RL = 150Ω 70MHz Crosstalk Between Active Channels
  at 10MHz –60dB Slew Rate RL = 150Ω 1100V/μs Differential Gain RL = 150Ω 0.07% Differential Phase RL = 150Ω 0.05° Channel Select Time RL = 150Ω, VIN = 1V 2.5ns Enable Time RL = 150Ω 10ns Output Voltage Swing RL = 150Ω ±3V Output Offset Voltage
  Supply Current
  Supply Current Disabled …

文章

• 下载
  250MHz RGB Video Multiplexer in Space-Saving Package Drives Cables, Switches Pixels at 100MHz &mdash LT Journal
  PDF, 275 Kb, 档案已发布: Nov 1, 1998
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  DESIGN FEATURES 250MHz RGB Video Multiplexer in
  Space-Saving Package Drives
  Cables, Switches Pixels at 100MHz
  by John Wright and
  Frank Cox Dense Process Yields
  One of the first products from LTC’s Big Performance from
  new proprietary high speed bipolar Tiny PC Board Space
  Introduction process is a 250MHz RGB (red, green,
  blue) multiplexer that is optimized for
  switching speed and makes excellent
  use of the new complementary 6GHz
  transistors. This new MUX, the
  LT1675, is designed for pixel switching in video graphics and for RGB
  routing. It is configured with three
  SPDT (single pole, double throw) RGB
  video switches and three current feedback amplifiers for direct driving of
  cables.
  The new RGB MUX is similar to the
  LT1203/LT1205 video switches combined with the LT1260 triple CFA, but
  with greatly enhanced performance
  in far less space. The boost over the
  older configuration is a factor of five
  in switching speed and a factor of 2.5 …

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• Signal Conditioning > Amplifiers > Video Functions