Analog DevicesAD9548/PCBZ时钟和计时开发板和套件

AD9548/PCBZ is AD9548 Quad/Octal Input Network Clock Generator/Synchronizer Evaluation Board. The AD9548 provides synchronization for many systems, including synchronous optical networks (SONET/SDH).The AD9548 generates an output clock synchronized to one of up to four differential or eightsingle-ended external input references. The digital PLL allows for reduction of input time jitter or phase noise associated with the external references.The AD9548 continuously generates a clean (low jitter), valid output clock even when all references have failed by means of a digitally controlled loop and holdover circuitry.