AD9520-5BCPZ-REEL7

Overview

The AD9520-5BCPZ-REEL7 is a multi-output clock generator featuring an on-chip PLL and support for external VCOs up to 2.4 GHz. It provides twelve LVPECL outputs in four groups, each with a 1-to-32 divider and phase delay capability. Outputs can be reconfigured as CMOS drivers for frequencies up to 250 MHz. The device accepts differential or single-ended references up to 250 MHz and includes automatic reference holdover. It operates from a single 3.3 V supply over the -40°C to +85°C range.

Feature Summary

• Twelve LVPECL outputs divided into four groups with independent 1-to-32 dividers
• Supports external 3.3 V/5 V VCOs up to 2.4 GHz
• Additive output jitter as low as 225 fs rms
• SPI- and I2C-compatible serial control port with nonvolatile EEPROM

Applications

• Low jitter, low phase noise clock distribution
• Clock generation for SONET, 10Ge, 10GFC, Synchronous Ethernet, OTU2/3/4
• Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs
• High performance wireless transceivers
• ATE and high performance instrumentation

Procurement Notes

Verify the REEL7 suffix indicates tape-and-reel packaging rather than tray packaging when sourcing components. Confirm the specific revision level matches design requirements, as Analog Devices may issue updates that alter specifications without notice. Ensure ESD precautions are observed during handling due to the LFCSP package sensitivity.

Selection Notes

Select this component when subpicosecond jitter performance and flexible output configurations are required. The AD9520-5 supports both LVPECL and CMOS outputs, allowing mixed logic families on a single board. Verify that the external VCO voltage requirements align with the device's 3.3 V to 5.5 V operating range. Consider the AD9522-5 if LVDS drivers are preferred over LVPECL.

Part Context

The AD9520-5 belongs to the AD9520 family of clock generators designed for high-performance timing applications. It shares core architecture with variants like the AD9520-0 and AD9520-1 but differs in specific internal PLL characteristics and supported frequency ranges. The BCPZ suffix denotes the 64-lead LFCSP package suitable for surface mount assembly.

Replacement Considerations

The AD9522-5 serves as a direct alternative for designs requiring LVDS outputs instead of LVPECL. Other family members such as the AD9520-0 or AD9520-1 may offer different VCO integration options but require verification of pin compatibility and electrical specifications before substitution.