350MHz/250MHz, 2-Channel Video Multiplexer-Amplifiers

 

Part Number	Replacement	Explanation

Description

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The MAX4158/MAX4159/MAX4258/MAX4259 are wideband, 2-channel, noninverting video amplifiers with input multiplexing, capable of driving ±2.5V signals into 50Ω or 75Ω loads. These devices are current-mode feedback amplifiers; gain is set by external feedback resistors. The MAX4158/MAX4159 are optimized for unity gain (0dB) with a -3dB bandwidth of 350MHz. The MAX4258/MAX4259 are optimized for gains of two (6dB) or more with a 250MHz -3dB bandwidth. These devices have low (0.01%/0.01°) differential gain and phase errors, and operate from ±5V supplies.

These devices are ideal for use in broadcast and graphics video systems because of their low, 2pF input capacitance, channel-to-channel switching time of only 20ns, and wide, 130MHz 0.1dB bandwidth. In addition, the combination of ultra-high speed and low power makes them suitable for use in general-purpose high-speed applications, such as medical imaging, industrial instrumentation, and communications systems.

The MAX4159/MAX4259 have address latching and high-impedance output disabling, allowing them to be incorporated into large switching arrays. They are available in 14-pin SO and 16-pin QSOP packages. The MAX4158/MAX4258 have no address latching or output disabling, but are available in space-saving 8-pin µMAX® and SO packages.

MAX4158, MAX4159, MAX4258, MAX4259: Pin Configurations/Functional Diagrams/Truth Tables Enlarge+

Key Features

• Excellent Video Specifications:
  • 0.1dB Gain Flatness to 130MHz
  • 0.01%/0.01° Differential Gain/Phase Error
• High Speed:
  • 350MHz -3dB Bandwidth (MAX4158/4159)
  • 250MHz -3dB Bandwidth (MAX4258/4259)
  • 700V/µs Slew Rate (MAX4158/4159)
  • 1000V/µs Slew Rate (MAX4258/4259)
  • 20ns Settling Time to 0.1%
• Fast Switching:
  • 20ns Channel-Switching Time
  • <70mV Switching Transient
• Low Power: 100mW
• Directly Drive 75Ω or 50Ω Cables
• High Output Current Drive: >70mA
• Address Latch and High-Z Output Disable

Applications/Uses

• Broadcast Video
• Coaxial Cable Drivers
• High-Definition Television (HDTV)
• High-Speed Signal Processing
• Multimedia Products
• Pixel Switching
• Video Crosspoint Switching
• Video Signal Multiplexing
• Workstations