AD9548BCPZ Datasheet PDF - ADI

●Product Details

●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 eight single-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.

●The AD9548 operates over an industrial temperature range of −40°C to +85°C.

●Applications

● Network synchronization

● Cleanup of reference clock jitter

● GPS 1 pulse per second synchronization

● SONET/SDH clocks up to OC-192, including FEC

● Stratum 2 holdover, jitter cleanup, and phase transient control

● Stratum 3E and Stratum 3 reference clocks

● Wireless base stations, controllers

● Cable infrastructure

● Data communications

●### Features and Benefits

● Supports Stratum2 stability in holdover mode

● Supports reference switchover with phase build-out

● Supports hitless reference switchover

● Auto/manual holdover and reference switchover

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● 4 pairs of reference input pins with each pair configurable as a single differential input or as 2 independent single-ended inputs

● Input reference frequencies from 1 Hz to 750 MHz

● Reference validation and frequency monitoring (1ppm)

● Programmable input reference switchover priority

● Please see data sheet for additional features.

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