AD9571ACPZLVD-RL

Overview

The AD9571ACPZLVD-RL is a multi-output clock generator optimized for Ethernet line card applications. It features a fully integrated VCO/PLL core with an integer-N design, eliminating the need for external loop filter components. The device accepts a 25 MHz reference input and provides outputs at 156.25 MHz, 100/125 MHz, 33.33 MHz, and six copies of 25 MHz. It supports LVPECL or LVDS output formats for high-speed signals and CMOS for lower frequencies. Operating on a single 3.3 V supply, it delivers low jitter performance, specified at 0.17 ps rms (1.875 MHz to 20 MHz) at 156.25 MHz.

Feature Summary

• Fully integrated VCO/PLL core with preprogrammed feedback and output dividers
• Low phase noise: -145 dBc/Hz at 1 MHz offset for 156.25 MHz LVDS output
• Integrated loop filter requiring no external components
• Configurable 100 MHz or 125 MHz differential outputs via FREQSEL strapping pin

Applications

• Ethernet line cards, switches, and routers
• SCSI, SATA, and PCI-express systems
• Low jitter, low phase noise clock generation

Procurement Notes

Verify the LFCSP-40 package configuration and ensure proper grounding of the exposed paddle for thermal management. Confirm that the board layout accommodates the specific termination requirements for LVPECL or LVDS outputs as defined in the datasheet. Check humidity sensitivity handling procedures during assembly.

Selection Notes

Select this component when designing Ethernet infrastructure requiring precise clock distribution without external PLL tuning. Ensure the application utilizes a 25 MHz crystal or reference clock. Verify power dissipation limits, which range from 0.48 W for LVDS to 0.69 W for LVPECL operation, against the thermal capabilities of the PCB.

Part Context

This part belongs to the Analog Devices AD9571 family of clock generators. The suffix 'ACPZ' indicates the lead-free LFCSP package, while 'LVD' specifies the LVDS output format variant. The '-RL' suffix denotes reel packaging for automated surface-mount assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.