General Description

The MAX498/MAX499 are high-speed, quad/triple, single-pole/double-throw video switches with on-board closed-loop buffer amplifiers. The buffer amplifiers feature +6dB gain (AVCL = 2V/V), 250MHz -3dB bandwidth, 70MHz 0.1dB gain flatness, and 1250V/µs slew rate. Fast switching time (3ns) and fast settling time (12ns for a 4V step) make these devices excellent choices for a wide variety of video applications. The low differential gain/phase errors (0.03/0.06°) and wide bandwidth make them ideal for both composite-video and RGB applications. The amplifiers are capable of delivering ±2.5V into back-terminated 50Ω or 75Ω cables, and they deliver ±2V to a 75Ω load, allowing multiple cables to be driven from a single output.

Features

♦ High Speed:

    250MHz Small-Signal -3dB Bandwidth

    135MHz Full-Power -3dB Bandwidth

♦ 70MHz 0.1dB Gain Flatness

♦ 1250V/µs Slew Rate

♦ 12ns to 0.1 Settling Time

♦ 0.03°/0.06 Differential Phase/Gain Error

♦ 2pF Input Capacitance

♦ 3ns Channel-Switching Time

♦ 120mVp-p Channel-Switching Transient

♦ Three-State Output Allows Large Switch Arrays

♦ Directly Drives 50Ω or 75Ω Back-Terminated Cables

Applications

    Video Switching and Routing

    Broadcast-Quality Composite-Video Multiplexing

    Workstations

    Video Editing

    Broadcast and High-Definition TV Systems

    Multimedia Products

    Medical Imaging