AD9522-3BCPZ

Overview

The AD9522-3BCPZ is a 12-channel clock generator and distribution IC from Analog Devices, housed in a 64-lead LFCSP package. It features an integrated voltage-controlled oscillator (VCO) with a tuning range of 1.72 GHz to 2.25 GHz, supporting external VCOs up to 2.4 GHz. The device provides twelve 800 MHz LVDS outputs or twenty-four 250 MHz CMOS outputs, configurable via internal dividers. Key electrical parameters include a maximum input frequency of 250 MHz, a supply voltage of 3.3 V, and an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated on-chip VCO tunes from 1.72 GHz to 2.25 GHz; supports external VCO/VCXO up to 2.4 GHz
• Twelve 800 MHz LVDS outputs divided into four groups, each with 1-to-32 divider and phase delay
• Low additive output jitter as low as 242 fs rms; channel-to-channel skew <60 ps
• SPI- and I²C-compatible serial control port with nonvolatile EEPROM for configuration storage

Applications

• Clock generation and translation for SONET, 10Ge, and 10G FC protocols
• Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFE transceivers
• Forward error correction (G.710) systems
• High-performance wireless transceivers and broadband infrastructures

Procurement Notes

Verify the specific suffix 'BCPZ' against the manufacturer's ordering guide to confirm the package type and tape/reel specifications. Ensure that the required external loop filter components are selected according to the datasheet recommendations for the desired PLL bandwidth and stability. Confirm that the application circuit accommodates the specified 3.3 V supply voltage and thermal requirements for the LFCSP-64 package.

Selection Notes

Select the AD9522-3 variant specifically when an integrated VCO covering the 1.72 GHz to 2.25 GHz range is required. If LVPECL drivers are needed instead of LVDS, consider the equivalent AD9520-3. Verify that the target output frequencies do not exceed the 800 MHz limit for LVDS or 250 MHz for CMOS configurations. Ensure the design supports the necessary external reference inputs, which can be differential, single-ended, or crystal-based.

Part Context

The AD9522-3 is part of the AD9522 family of multioutput clock generators designed for subpicosecond jitter performance. It shares the same functional block diagram and pinout with other variants like the AD9522-0, AD9522-1, and AD9522-2, differing primarily in the integrated VCO frequency range and driver types. This specific model focuses on the 2 GHz VCO range with LVDS outputs.

Replacement Considerations

The AD9520-3 is documented as an equivalent part featuring LVPECL/CMOS drivers instead of LVDS/CMOS drivers. Other family members such as the AD9522-0, AD9522-1, and AD9522-2 share the same package and interface but have different VCO tuning ranges.