AD9520-2BCPZ-REEL7

Overview

The AD9520-2BCPZ-REEL7 is a multi-output clock generator and fanout buffer in a 64-lead LFCSP package. It integrates a phase-locked loop (PLL) with an on-chip voltage-controlled oscillator (VCO) tuning from 2.02 GHz to 2.335 GHz, or supports external VCOs/VCXOs up to 2.4 GHz. The device provides twelve 1.6 GHz LVPECL outputs divided into four groups, each with a 1-to-32 divider and phase delay capability. Outputs can be reconfigured as CMOS for frequencies up to 250 MHz. Additive output jitter is as low as 225 fs rms, with channel-to-channel skew under 16 ps within groups. It operates on a single 3.3 V supply over the -40°C to +85°C temperature range.

Feature Summary

• Integrates a PLL with an on-chip VCO (2.02 GHz to 2.335 GHz) or external VCO/VCXO support up to 2.4 GHz
• Provides twelve 1.6 GHz LVPECL outputs organized in four groups, each with a programmable 1-to-32 divider and phase offset
• Supports reconfiguration of LVPECL outputs to dual CMOS outputs for frequencies up to 250 MHz
• Features additive output jitter as low as 225 fs rms and channel-to-channel skew less than 16 ps
• Includes nonvolatile EEPROM for storing configuration settings accessible via SPI or I²C serial interfaces

Applications

• Low jitter, low phase noise clock distribution systems
• Clock generation and translation for SONET, 10Ge, 10GFC, Synchronous Ethernet, and OTU2/3/4
• Forward error correction (G.710) applications
• Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFEs
• High-performance wireless transceivers and broadband infrastructures

Procurement Notes

Verify the REEL7 suffix indicates tape and reel packaging when sourcing components. Confirm that the specific revision matches the required design specifications, as Analog Devices may update datasheets without notice. Ensure compatibility with standard industrial temperature ranges (-40°C to +85°C) for the intended application environment.

Selection Notes

Select the AD9520-2 variant specifically for its on-chip VCO tuning range of 2.02 GHz to 2.335 GHz. Consider the AD9520-0 or AD9520-1 if different internal VCO frequency ranges are required. Evaluate the need for LVDS drivers; if LVDS is preferred over LVPECL, the AD9522-2 is the appropriate alternative within the product family.

Part Context

The AD9520-2BCPZ-REEL7 belongs to the AD9520 family of clock generators. This family offers subpicosecond jitter performance and flexible output configurations. The -2 suffix denotes the specific version with the defined internal VCO range. The BCPUZ suffix indicates the 64-lead LFCSP package type, while REEL7 specifies the bulk tape and reel packaging format for automated assembly.

Replacement Considerations

For direct functional replacements within the same family, consider the AD9520-0BCPZ or AD9520-1BCPZ, noting differences in internal VCO tuning ranges. If LVDS output drivers are required instead of LVPECL, the AD9522-2 is the designated alternative.