AD724JR-REEL7

Overview

The AD724JR-REEL7 is a low-cost RGB to NTSC/PAL encoder manufactured by Analog Devices Inc. It converts red, green, and blue color component signals into corresponding luminance and chrominance signals compliant with NTSC or PAL standards. The device operates from a single +5 V supply and accepts FSC or 4FSC clocks, or utilizes an on-chip oscillator with an external crystal. It provides composite video, separate Y/C (S-Video), and luminance outputs capable of driving 75 Ω reverse-terminated loads. The unit is housed in a compact 16-lead SOIC package and functions within a commercial temperature range of 0 °C to +70 °C.

Feature Summary

• Integrates RGB-to-YUV encoding matrix with matched luma and chroma delays for time-aligned outputs without requiring external filters or delay lines.
• Features onboard DC clamps and logic XNOR circuitry to accept HSYNC/VSYNC or CSYNC inputs directly.
• Supports multiple clocking modes including FSC/4FSC CMOS clocks or parallel-resonant crystals via an internal Phase Locked Loop.
• Provides simultaneous composite, S-video, and luminance outputs optimized for direct connection to standard 75 Ω video cables.

Applications

• Converting VGA port RGB signals to NTSC/PAL television standards
• Encoding digital RGB video from MPEG decoders for analog display
• Low-cost integrated video encoding solutions for multimedia devices

Procurement Notes

Verify the specific REEL7 suffix indicates tape-and-reel packaging when sourcing components. Confirm that the ordering information matches the manufacturer's current documentation, as product availability and specifications are subject to change without notice. Ensure compatibility with existing system voltage and clock requirements before procurement.

Selection Notes

Select this component for applications requiring direct conversion of RGB component signals to standard definition composite or S-video formats. Ensure the design supports a single +5 V power supply and accommodates the required subcarrier clock frequencies (3.58 MHz for NTSC or 4.43 MHz for PAL). Verify that the 16-lead SOIC package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the AD724 series of video encoders produced by Analog Devices. The AD724 family is designed specifically for cost-effective conversion of RGB signals to broadcast-standard video formats. The JR-REEL7 designation identifies the specific commercial temperature grade variant packaged in a reel format for automated surface-mount assembly.

Replacement Considerations

Direct functional replacements should be sought among other RGB-to-NTSC/PAL encoders from Analog Devices or compatible manufacturers. Verify pinout compatibility and electrical specifications, particularly supply voltage and output drive capabilities, when substituting equivalent parts.