This note introduces a robust solution for transmitting composite video with output short-to-battery protection. The solution includes the ADV7391/ADV7393 low power, chip scale 16-/8-bit SD/HD video encoders and the ADA4432-1 and ADA4433-1 single-ended SD video filter amplifiers, both with output short-to-battery protection.
This document describes the CN-0264 reference circuit, which pairs an ADV7391/ADV7393 video encoder with an ADA4432-1 or ADA4433-1 video filter amplifier. The design is intended for transmitting composite video (CVBS) in harsh infotainment environments, such as automotive applications, by providing robust protection against overvoltage and electrostatic discharge (ESD).
The circuit functions as a digital-to-analog video converter paired with a reconstruction filter to transmit composite video in harsh environments like automotive applications.
The circuit provides overvoltage protection up to 18 V on the outputs.
The circuit features a high-order filter with a −3 dB cutoff frequency of 10 MHz and 45 dB of rejection at 27 MHz.