AD722JR-16

Overview

The AD722JR-16 is a low-cost, integrated RGB to NTSC/PAL encoder manufactured by Analog Devices Inc. It converts red, green, and blue color component signals into corresponding luminance (Y) and chrominance (C) signals compliant with NTSC or PAL standards. The device combines these outputs to provide composite video capability while driving 75 Ω reverse-terminated loads. It operates from a single +5 V supply and accepts FSC clock, crystal, or 4FSC clock inputs. The chip features onboard DC restoration and logic-selectable encoding modes without requiring external delay lines or filters.

Feature Summary

• Integrated conversion of RGB components to NTSC or PAL luminance and chrominance signals
• Logic-selectable encoding modes for NTSC and PAL standards
• Onboard DC restoration circuitry for signal integrity
• Single +5 V power supply operation with CMOS-compatible logical inputs

Applications

• RGB to NTSC or PAL video encoding systems
• Composite video output generation
• S-Video (Y/C) signal processing applications

Procurement Notes

Verify the specific suffix 'JR-16' against official Analog Devices documentation to confirm package type and temperature range. Ensure compatibility with required clock inputs and load impedances before procurement.

Selection Notes

Select this component when an integrated solution for RGB-to-video conversion is required without external filters. Confirm that the single +5 V supply voltage aligns with system power constraints and that the 75 Ω drive capability meets display interface requirements.

Part Context

The AD722 series belongs to Analog Devices' video encoder portfolio, designed for compact video signal processing. This specific part integrates encoding functions typically requiring multiple discrete components, reducing board space and design complexity for standard definition video applications.

Replacement Considerations

Check for updated revisions within the AD722 family. Verify pinout compatibility if substituting with other RGB encoders. Ensure equivalent performance in terms of bandwidth and output drive strength.