AD9522-2BCPZ-REEL7

Overview

The AD9522-2BCPZ-REEL7 is a 12-channel clock generator and distribution IC from Analog Devices, housed in a 64-lead LFCSP package. It integrates a phase-locked loop (PLL) and a voltage-controlled oscillator (VCO) with a tuning range of 2.02 GHz to 2.335 GHz. The device supports external VCOs up to 2.4 GHz and accepts reference inputs from CMOS, LVPECL, or LVDS sources up to 250 MHz. It provides twelve 800 MHz LVDS outputs, which can be reconfigured as twenty-four 250 MHz CMOS outputs. Key electrical parameters include a supply voltage of 3.135 V to 3.465 V, an operating temperature range of -40°C to +85°C, and additive output jitter as low as 242 fs rms.

Feature Summary

• Integrates a PLL and on-chip VCO with a frequency range of 2.02 GHz to 2.335 GHz.
• Provides 12 LVDS outputs (divided into 4 groups) or 24 CMOS outputs with configurable dividers.
• Supports external 3.3 V/5 V VCO/VCXO inputs up to 2.4 GHz.
• Features glitch-free reference switchover and automatic holdover modes.

Applications

• Clock generation for SONET, 10Ge, and 10G FC protocols.
• Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFEs.
• Low jitter clock distribution for broadband infrastructures.
• High-performance wireless transceivers and ATE systems.

Procurement Notes

Verify the specific suffix REEL7 indicates reel packaging when sourcing. Confirm RoHS compliance status through official documentation. Ensure the component matches the 64-lead LFCSP physical dimensions for PCB layout compatibility. Check for moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this model if LVDS output drivers are required; use the AD9520-2 variant for LVPECL drivers. Verify that the internal VCO range (2.02–2.335 GHz) meets the target frequency planning needs. Consider the need for external VCO support if frequencies above 2.335 GHz are necessary. Ensure the serial control interface (SPI/I²C) aligns with the system controller capabilities.

Part Context

The AD9522-2 is part of the AD9522 family of multi-output clock generators. It is functionally equivalent to the AD9520-2, differing primarily in the output driver type (LVDS vs. LVPECL). The device is designed for applications requiring subpicosecond jitter performance and flexible clock distribution architectures.

Replacement Considerations

The AD9520-2BCPZ-REEL7 is an equivalent part featuring LVPECL/CMOS drivers instead of LVDS/CMOS drivers. Other members of the AD9522 family, such as the AD9522-0 or AD9522-1, may serve as alternatives depending on specific VCO frequency ranges and output configuration requirements.

FAQ

Can the LVDS outputs be configured as CMOS outputs?

Yes, any of the 800 MHz LVDS outputs can be reconfigured as two 250 MHz CMOS outputs.

What is the maximum input frequency for the reference inputs?

The reference inputs accept CMOS, LVPECL, or LVDS signals up to 250 MHz.

Does the device support external oscillators?

Yes, it supports external 3.3 V/5 V VCOs or VCXOs with frequencies up to 2.4 GHz.