AD9544BCPZ

Overview

The AD9544BCPZ is a dual digital phase-locked loop (DPLL) synchronizer and jitter cleaner manufactured by Analog Devices Inc. It features two DPLLs capable of synchronizing input references from 1 Hz to 750 MHz, providing frequency translation with jitter cleaning for noisy sources. The device includes ten clock outputs supporting differential LVDS, HCSL, CML, or single-ended configurations up to 500 MHz. It operates on a single 1.8 V supply within the -40°C to +85°C temperature range and is housed in a 48-lead LFCSP package.

Feature Summary

• Dual DPLL architecture supports continuous frequency monitoring and reference validation with deviation detection as low as 50 ppb.
• Features programmable digital loop filter bandwidth ranging from 10^-4 Hz to 1850 Hz and 24-bit fractional dividers.
• Provides automatic and manual holdover with zero delay, hitless, or phase buildout operation capabilities.
• Includes external EEPROM support for autonomous initialization and built-in temperature monitoring.

Applications

• SyncE and GPS synchronization and jitter cleanup
• Optical transport networks (OTN), SDH, and macro/small cell base stations
• JESD204B support for ADC and DAC clocking
• Stratum 2, Stratum 3e, and Stratum 3 holdover applications

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status via official documentation. Ensure handling procedures account for moisture sensitivity levels specified in the datasheet. Validate that the specific ordering suffix matches the required package and temperature grade.

Selection Notes

Select this component when dual independent DPLLs are required for high-performance synchronous clocking. Verify that input reference frequencies fall within the 1 Hz to 750 MHz range. Ensure output requirements align with the available LVDS, HCSL, CML, or single-ended driver options. Check power supply constraints against the 1.8 V nominal requirement.

Part Context

The AD9544BCPZ belongs to the AD9544 series of clock synchronizers. It serves as a derivative for the AD9545 model. The device integrates dual DPLL cores optimized for protocols such as IEEE 1588 Version 2, Synchronous Ethernet, and OTN. It is designed for applications requiring precise phase transient control and jitter cleaning.

Replacement Considerations

The AD9545 is identified as a related model in the product family. Verify pin compatibility and functional equivalence before substitution. Consult the official datasheet for detailed comparison of specifications and electrical characteristics between these variants.