AD9520-5BCPZ

Overview

The AD9520-5BCPZ is a multi-output clock generator featuring an integrated phase-locked loop and support for external VCOs up to 2.4 GHz. It provides twelve LVPECL outputs grouped into four channels, each with independent divide ratios (1–32) and phase delay capabilities. Outputs can be reconfigured as CMOS pairs for frequencies up to 250 MHz. The device operates on a single 3.3 V supply, supports SPI/I2C control, and includes nonvolatile EEPROM for configuration storage. Additive output jitter is specified at 225 fs rms, with channel-to-channel skew under 16 ps within groups.

Feature Summary

• Twelve LVPECL outputs divided into four groups, each with a 1-to-32 divider and programmable phase offset
• Low additive output jitter of 225 fs rms and channel-to-channel skew less than 16 ps
• Supports external 3.3 V/5 V VCO/VCXO up to 2.4 GHz or internal PLL operation
• Nonvolatile EEPROM stores user-defined register settings for power-up initialization

Applications

• Clock generation and translation for SONET, 10Ge, 10GFC, Synchronous Ethernet, OTU2/3/4
• Forward error correction (G.710)
• Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs
• High-performance wireless transceivers
• ATE and high-performance instrumentation

Procurement Notes

Verify the complete part number including the BCPZ suffix to ensure the correct LFCSP-64 package and RoHS compliance. Confirm the specific revision (Rev. C) against the latest Analog Devices documentation to account for any technical updates or pinout changes prior to procurement.

Selection Notes

Select this component when subpicosecond jitter performance and flexible output distribution are required. Ensure the application utilizes an external VCO if frequencies above 1.6 GHz are needed for the LVPECL outputs. Verify that the system design accommodates the 64-lead LFCSP thermal requirements and the 3.3 V power supply constraints.

Part Context

This part belongs to the AD9520 family of low-noise clock generators. The AD9520-5 variant specifically targets applications requiring LVPECL outputs. For designs needing LVDS drivers instead, the AD9522-5 is the designated alternative within the same product family.

Replacement Considerations

The AD9522-5 serves as a functional replacement where LVDS outputs are preferred over LVPECL. Other AD9520 family members may offer different output configurations or frequency ranges but require verification of electrical compatibility.