The MAX457 is a dual CMOS video amplifier that operates from a +5 V supply and consumes about 350 mW. It provides two unity‑gain stable amplifiers capable of driving 75 Ω loads with a -3 dB bandwidth of 70 MHz. The device features low input capacitance (4 pF), low input bias current (100 pA), and high isolation between channels (72 dB at 5 MHz).
Typical applications include 75 Ω cable drivers, video distribution amplifiers, and driving flash converters. The amplifiers require no external compensation and can be configured for various closed‑loop gains using external resistors. Ordering information, pin configuration, absolute maximum ratings, and detailed electrical characteristics are provided for multiple package options.
| Low Input Capacitance | 4 pF |
|---|---|
| Input Bias Current | 100 pA |
| Isolation Between Amplifiers | 72 dB at 5 MHz |
| Supply Voltage | +5 V |
| Power Consumption | ≈350 mW |
The typical input bias current is 100 pA.
The amplifiers operate from a +5 V supply.
The MAX457EPA operates from –40 °C to +85 °C.