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

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.

Applications

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

* 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