AD9518-4ABCPZ

Overview

The AD9518-4ABCPZ is a six-output clock generator from Analog Devices, packaged in a 48-lead LFCSP. It integrates a phase-locked loop and a voltage-controlled oscillator (VCO) with a tuning range of 1.45 GHz to 1.80 GHz. The device supports an external VCO or VCXO input up to 2.4 GHz. It provides three pairs of LVPECL outputs capable of operating at frequencies up to 1.6 GHz. Each output pair includes a programmable divider ranging from 1 to 32 and coarse phase delay adjustment. Key performance metrics include an additive output jitter of 225 fs rms and channel-to-channel skew of less than 10 ps for paired outputs.

Feature Summary

• Integrated PLL and VCO with a tuning frequency range of 1.45 GHz to 1.80 GHz
• Six LVPECL outputs organized in three pairs, supporting frequencies up to 1.6 GHz
• Programmable divide ratios (1 to 32) and coarse phase delay for each output pair
• Additive output jitter of 225 fs rms with channel-to-channel skew under 10 ps

Applications

• Low jitter, low phase noise clock distribution systems
• 10/40/100 Gb/sec networking line cards including SONET, Synchronous Ethernet, and OTU2/3/4
• Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFEs
• High-performance wireless transceivers and automatic test equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Confirm that the charge pump supply (VCP) requirements align with system design, as external VCO operation may require connecting VCP to 5 V. Ensure proper thermal management is planned, as power dissipation can reach 1.7 W during full operation.

Selection Notes

Select the AD9518-4 when an integrated VCO tuned between 1.45 GHz and 1.80 GHz is required. This model is distinct from other family members like the AD9518-0, which features a higher frequency internal VCO. Consider the AD9520 or AD9522 if additional outputs, crystal reference inputs, or EEPROM-based startup configuration are needed instead.

Part Context

The AD9518-4 belongs to the AD9518 family of multi-output clock generators. It shares functional similarities with the AD9516 and AD9517 but offers a specific combination of LVPECL outputs. The device is designed to maximize data converter performance through subpicosecond jitter capabilities and is suitable for demanding phase noise applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.