PM7538B数据手册MaxLinear中文资料规格书

描述 Description

The PM7538 SyntheCLK-ADV™ is a high- performance jitter attenuator and multi-output clock synthesizer that provides ultra-low jitter and phase noise outputs. A cascaded PLL architecture, with 18 independent dividers and clock drivers, provides a solution that is tailored to a wide variety of wireless base station applications that require a highly integrated low-power clocking solution.

The Jitter Attenuator (JAT) PLL filters jitter on the incoming reference clock and synchronizes an external VCXO. The clock synthesizer PLL uses a high performance VCO to provide a high-frequency master clock which is provided to the 18-output divider and driver array.

By cascading the clock synthesizer PLL with the JAT PLL, this architecture provides superior phase noise performance over a wide range of output frequencies using a low-cost, low-frequency VCXO. In addition to the superior output phase noise and jitter performance, the SyntheCLK-ADV offers a variety of features targeted at implementing JESD204B based designs.

特性 Features

Jitter Attenuator PLL (PLL1)
·Accepts single ended or differential VCXO and reference clock inputs from 30.72MHz to 614.4MHz
·Four independent reference clock input ports with digital reference clock stability monitoring (LOS detection)
·Support for automatic and manual holdover modes
·Dynamic JAT PLL settling provides fast locking at start-up and low bandwidth for optimal jitter attenuation
·Dedicated differential VCXO buffered output; may use three additional LVCLK output pairs for a total of four VCXO buffered outputs
·Dual Lock indication status pins for PLL1 and PLL2, which may optionally be combined onto one pin
Clock Synthesizer PLL (PLL2)
·Wideband VCO supporting master clock (MCLK) rates up to 3200MHz
·Support for external VCO
·Low-noise PFD and charge pump operates at up to 153.6MHz
·Optional zero-delay operation

应用 Application

·Low jitter, low phase noise clock distribution
·Clocking high performance ADCs, DACs, RF synthesizers, FPGAs
·JEDEC JESD204B applications
·High performance wireless transceivers
·Broadband wireless infrastructure