GENERAL DESCRIPTION

The AD9572 provides a multioutput clock generator function along with two on-chip PLL cores, optimized for fiber channel line card applications that include an Ethernet interface. The integer-N PLL design is based on the Analog Devices, Inc., proven portfolio of high performance, low jitter frequency synthesizers to maximize network performance. Other applications with demanding phase noise and jitter requirements also benefit from this part.

FEATURES

Fully integrated dual VCO/PLL cores

0.22 ps rms jitter from 0.637 MHz to 10 MHz at 106.25 MHz

0.19 ps rms jitter from 1.875 MHz to 20 MHz at 156.25 MHz

0.42 ps rms jitter from 12 kHz to 20 MHz at 125 MHz

Input crystal or clock frequency of 25 MHz

Preset divide ratios for 106.25 MHz, 156.25 MHz, 33.33 MHz, 100 MHz, and 125 MHz

Choice of LVPECL or LVDS output format

Integrated loop filters

Copy of reference clock output

Rates configured via strapping pins

0.71 W power dissipation (LVDS operation)

1.07 W power dissipation (LVPECL operation)

3.3 V operation

Space saving, 6 mm × 6 mm, 40-lead LFCSP

APPLICATIONS

Fiber channel line cards, switches, and routers

Gigabit Ethernet/PCIe support included

Low jitter, low phase noise clock generation