AD9518-2ABCPZ

Overview

The AD9518-2ABCPZ is a 6-output clock generator featuring an integrated voltage-controlled oscillator (VCO) with a tuning range of 2.05 GHz to 2.33 GHz. It provides three pairs of LVPECL outputs operating up to 1.6 GHz, each sharing a programmable 1-to-32 divider with coarse phase delay capabilities. The device supports additive output jitter as low as 225 fs rms and channel-to-channel skew under 10 ps for paired outputs. It accepts differential or single-ended reference inputs up to 250 MHz and includes automatic holdover and reference switchover functions. The component operates from a single 3.3 V supply and is housed in a 48-lead LFCSP package.

Feature Summary

• Integrated on-chip VCO tunes from 2.05 GHz to 2.33 GHz
• Six LVPECL outputs in three pairs, supporting frequencies up to 1.6 GHz
• Additive output jitter of 225 fs rms with channel-to-channel skew less than 10 ps
• Supports differential or dual single-ended reference inputs up to 250 MHz

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and temperature range. Ensure compatibility with the required supply voltages, specifically the main supply and the separate LVPECL supply range. Confirm that the 48-lead LFCSP footprint matches the design layout requirements.

Selection Notes

Select this component when subpicosecond jitter performance and low phase noise are critical for maximizing data converter performance. Consider the AD9518-2 if six LVPECL outputs are sufficient; otherwise, evaluate the AD9520 or AD9522 for additional output counts or EEPROM configuration support. Verify that the internal VCO range meets the frequency planning needs or determine if an external VCXO is required.

Part Context

The AD9518-2 is part of the AD9518 family, which also includes the AD9516 and AD9517. These variants differ primarily in package size and the number of available outputs. The AD9518-2 specifically offers six LVPECL outputs in a 48-lead LFCSP, distinguishing it from other members of the series that may have fewer outputs or different form factors.

Replacement Considerations

For applications requiring more outputs or EEPROM-based startup configuration, the AD9520 and AD9522 are available alternatives within the same product family.