AD9522-5BCPZ-REEL7

Overview

The AD9522-5BCPZ-REEL7 is a multi-output clock generator and distribution device from Analog Devices, packaged in a 64-lead LFCSP. It features an on-chip phase-locked loop (PLL) designed to interface with external voltage-controlled oscillators (VCOs) or VCXOs up to 2.4 GHz. The device provides twelve LVDS outputs, which can be reconfigured as twenty-four CMOS outputs for frequencies up to 250 MHz. Each output group includes a programmable divider (1-to-32) and phase delay control. Key electrical parameters include a 3.3 V supply voltage, input frequency support up to 250 MHz, and additive output jitter as low as 242 fs rms.

Feature Summary

• Supports external 3.3 V/5 V VCO/VCXO inputs up to 2.4 GHz
• Twelve LVDS outputs divided into four groups, each with a 1-to-32 divider
• Reconfigurable outputs: each LVDS pair can function as two 250 MHz CMOS outputs
• Additive output jitter as low as 242 fs rms

Applications

• Clock generation and translation for SONET, 10Ge, and 10G FC protocols
• Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFEs
• Low jitter, low phase noise clock distribution systems
• Forward error correction (G.710) applications

Procurement Notes

Verify the REEL7 suffix indicates tape-and-reel packaging when sourcing components. Confirm that the specific revision matches the required design specifications. Ensure compatibility with external VCO/VCXO voltage levels, as the device supports both 3.3 V and 5 V operation depending on the VCP supply configuration.

Selection Notes

Select the AD9522-5 variant specifically when an internal VCO is not required, relying instead on an external oscillator source. This model is suitable for designs needing flexible reference inputs (CMOS, LVPECL, LVDS) and glitch-free switchover capabilities. Consider the 64-lead LFCSP package constraints and thermal requirements for the final PCB layout.

Part Context

The AD9522-5 belongs to the AD9522 family of clock generators. It is functionally equivalent to the AD9520-5, except the AD9520-5 utilizes LVPECL drivers instead of LVDS drivers. The part number AD9522-5BCPZ-REEL7 specifies the -5 variant (external VCO support), BCPZ package code, and REEL7 reel packaging format.

Replacement Considerations

The AD9520-5 is an equivalent part within the same family, offering LVPECL/CMOS drivers instead of LVDS/CMOS drivers. Other members of the AD9522 family (e.g., AD9522-0, AD9522-1) feature integrated internal VCOs, which are not present in the AD9522-5.