The document describes the features and characteristics of the AD720 and AD721 RGB to NTSC/PAL encoders. It includes functional block diagrams and connection diagrams, explaining the input/output interfaces and operation of the products. The encoders are capable of converting RGB signals to composite video signals, chrominance, and luminance signals that comply with the NTSC and PAL encoding standards. They do not require external filters or delay lines, can drive 75-ohm terminated loads, and have compact packaging and low power consumption.
This document is a technical datasheet for the Analog Devices AD720 and AD721 integrated circuits. These devices are RGB to NTSC or PAL encoders that convert red, green, and blue color component signals into luminance and chrominance signals in accordance with television standards. The chips provide composite video output as well as separate S-Video (chrominance and luminance) outputs.
| Supply Voltage | +5 V (Recommended Range +4.75V to +5.25V) |
|---|---|
| Operating Temperature Range | 0°C to +70°C |
| Input Amplitude (NTSC) | 714 mV |
| Input Amplitude (PAL) | 700 mV |
| Low Power Consumption | 200 mW typical |
The devices support both NTSC and PAL encoding modes.
No, they do not require external filters or delay lines.