General Description

The MAX463–MAX470 series of two-channel, triple/quad buffered video switches and video buffers combines high-accuracy, unity-gain-stable amplifiers with high-performance video switches. Fast switching time and low differential gain and phase error make this series of switches and buffers ideal for all video applications. The devices are all specified for ±5V supply operation with inputs and outputs as high as ±2.5V when driving 150Ω loads (75Ω back-terminated cable).

Input capacitance is typically only 5pF, and channel-to channel crosstalk is better than 60dB, accomplished by surrounding all inputs with AC ground pins. The on board amplifiers feature a 200V/µs slew rate (300V/µs for AV = 2V/V amplifiers), and a bandwidth of 100MHz (90MHz for AV = 2V/V buffers). Channel selection is controlled by a single TTL-compatible input pin or by a microprocessor interface, and channel switch time is only 20ns.

For design flexibility, devices are offered with buffer amplifier gains of 1V/V or 2V/V for 75Ω back-terminated applications. Output amplifiers have a guaranteed output swing of ±2V into 75Ω.

Features

♦ 100MHz Unity-Gain Bandwidth

♦ 90MHz Bandwidth with 2V/V Gain

♦ 0.01%/0.03° Differential Gain/Phase Error

♦ Drives 50Ω and 75Ω Back-Terminated Cable Directly

♦ Wide Output Swing:

   ±2V into 75Ω

   ±2.5V into 150Ω

♦ 300V/µs Slew Rate (2V/V gain)

♦ 20ns Channel Switching Time

♦ Logic Disable Mode:

   High-Z Outputs

   Reduced Power Consumption

♦ Outputs May Be Paralleled for Larger Networks

♦ 5pF Input Capacitance (channel on or off)

Applications

   Broadcast-Quality Color-Signal Multiplexing

   RGB Multiplexing

   RGB Color Video Overlay Editors

   RGB Color Video Security Systems

   RGB Medical Imaging

   Coaxial-Cable Line Drivers