AD9573ARUZ-RL7

Overview

The AD9573ARUZ-RL7 is a fully integrated PCI Express clock generator featuring an on-chip PLL core optimized for low jitter applications. It accepts a 25 MHz external crystal input to generate two preset output frequencies: 100 MHz via LVDS and 33.33 MHz via LVCMOS. The device operates on a single 3.3 V supply with power dissipation of approximately 0.235 W. Key electrical parameters include a typical RMS jitter of 0.54 ps (12 kHz to 20 MHz offset) and phase noise as low as -150 dBc/Hz at 10 MHz offset. It is housed in a space-saving 16-lead TSSOP package.

Feature Summary

• Integrated integer-N PLL with preprogrammed divide ratios for 100 MHz and 33.33 MHz outputs, eliminating the need for external loop filter components.
• Dual output formats providing 100 MHz LVDS and 33.33 MHz LVCMOS signals from a single 25 MHz crystal reference.
• Ultra-low jitter performance with 0.54 ps rms integrated jitter (12 kHz to 20 MHz) and high phase noise suppression.
• Compact 16-lead TSSOP package (4.4 mm × 5.0 mm) designed for board space conservation.

Applications

• PCI Express (PCIe) clock generation for line cards, switches, and routers.
• CPU clock distribution systems requiring low phase noise.
• General low jitter clock generation for demanding digital interfaces.

Procurement Notes

Verify the specific suffix RL7 corresponds to the reel packaging configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the operating temperature range (-40°C to +85°C) matches the target application environment requirements before procurement.

Selection Notes

Select this component when a fixed 100 MHz LVDS and 33.33 MHz LVCMOS output pair is required without programmable frequency synthesis. It is suitable for designs constrained by board space due to its small TSSOP footprint. Ensure the design can accommodate a 25 MHz parallel resonant crystal with specified load capacitance and ESR values for proper PLL locking.

Part Context

The AD9573 is part of Analog Devices' portfolio of high-performance clock synthesizers. The ARUZ variant denotes the industrial temperature grade (-40°C to +85°C) and the RU-16 TSSOP package option. This model is specifically engineered for PCIe compliance, offering a simplified solution compared to programmable synthesizers by removing the need for external programming or complex analog filtering.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices for current equivalent recommendations if availability is restricted.