AD9518-4ABCPZ-RL7

Overview

The AD9518-4ABCPZ-RL7 is a 6-output clock generator featuring an integrated voltage-controlled oscillator (VCO) with a tuning range of 1.45 GHz to 1.80 GHz. It supports external VCO/VCXO inputs up to 2.4 GHz and accepts LVPECL, LVDS, or CMOS reference signals up to 250 MHz. The device provides three pairs of LVPECL outputs operating up to 1.6 GHz, each pair sharing a programmable divider from 1 to 32 with coarse phase delay capabilities. Key electrical parameters include a supply voltage of 3.3 V, additive output jitter of 225 fs rms, and channel-to-channel skew of less than 10 ps for paired outputs. It operates within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated on-chip VCO tunes from 1.45 GHz to 1.80 GHz; optional external VCO/VCXO support up to 2.4 GHz
• Six LVPECL outputs in three differential pairs, each with independent 1-to-32 dividers and coarse phase delay
• Low additive output jitter of 225 fs rms and channel-to-channel skew under 10 ps for paired outputs
• Flexible reference input accepting LVPECL, LVDS, or CMOS signals up to 250 MHz with automatic switchover

Applications

• Clock distribution for 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 MxFE transceivers
• High-performance wireless transceiver systems requiring low phase noise
• Automated test equipment (ATE) and high-performance instrumentation

Procurement Notes

Verify the specific suffix RL7 against the manufacturer's current ordering guide to confirm reel packaging specifications. Ensure compatibility with the required LFCSP-48 footprint and thermal management requirements for the industrial temperature range. Confirm that the serial control port interface matches the system design constraints.

Selection Notes

Select this component when subpicosecond jitter performance and low phase noise are critical for data converter applications. Choose the AD9518-4 over other family members if six LVPECL outputs are required. Consider the AD9520 or AD9522 if additional outputs or EEPROM configuration features are needed. Verify that the internal VCO range meets the frequency planning requirements or if an external VCXO is necessary.

Part Context

The AD9518-4 is part of the AD9518 family of low-jitter PLL clock synthesizers. It shares functional similarities with the AD9516 and AD9517 but differs in package size and output count. The AD9518-4 specifically offers six LVPECL outputs in a 48-lead LFCSP package, distinguishing it from other variants in the series designed for different output configurations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate the AD9516, AD9517, AD9520, and AD9522 as alternative family members based on output count and package requirements.