AD9547
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AD9547

Dual/Quad Input Network Clock Generator/Synchronizer

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Features
  • Supports Stratum 2 stability in holdover mode
  • Supports reference switchover with phase build-out
  • Supports hitless reference switchover
  • Automatic/manual holdover and reference switchover
  • 2 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 kHz to 750 MHz
  • Reference validation and frequency monitoring (1 ppm)
  • Programmable input reference switchover priority
  • 30-bit programmable input reference divider
  • 2 pairs of clock output pins, with each pair configurable as a single differential LVDS/LVPECL output or as 2 single-ended CMOS outputs
  • Output frequencies up to 450 MHz
  • See data sheet for additional features
Additional Details
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The AD9547 provides synchronization for many systems, including synchronous optical networks (SONET/SDH). The AD9547 generates an output clock that is synchronized to one of two differential or four single-ended external input references. The digital PLL allows for reduction of input time jitter or phase noise associated with the external references. The AD9547 con-tinuously generates a clean (low jitter), valid output clock, even when all references fail, by means of digitally controlled loop and holdover circuitry.

The AD9547 operates over an industrial temperature range of −40°C to +85°C.


Applications
  • Network synchronization
  • Cleanup of reference clock jitter
  • 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
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    AD9547

    Documentation

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    Data Sheet

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    UPDATED 07/01/2009
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    AD9547: Dual/Quad Input Network Clock Generator/Synchronizer Data Sheet (Rev.G)

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    User Guide

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    UPDATED 04/16/2014
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    UG-639: Evaluating the AD9547 and AD9548 Digital PLL Clock Synthesizers redirect icon

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    Frequently Asked Question

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    UPDATED 03/03/2022
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    Documentation

    Product Selection Guide 1

    RF, Microwave, and Millimeter Wave Product Selection Guide

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    3

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    2011-01-20

    08:59

    AD9547 / AD9548: Evaluation Board Software Overview

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    2011-01-20

    09:27

    AD9547 / AD9548: Profile Designer Software

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    2011-01-20

    03:22

    AD9547 / AD9548: Evaluation Board Setup

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    Evaluation Kits 1

    EVAL-AD9547

    AD9547 Evaluation Board

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    EVAL-AD9547

    AD9547 Evaluation Board

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    EVAL-AD9547
    AD9547 Evaluation Board

    Features and Benefits

    • Simple power connection using 6 V wall adapter and onboard switching and LDO voltage regulators
    • Regulators easily bypassed for power measurements
    • 8 ac-coupled SMA connectors for output
    • SMA connectors for
      2 differential or 4 single-ended reference input
      System clock input
    • On-board provisions for OCXO, crystal oscillator, or crystal
    • USB connection to PC
    • 32-bit or 64-bit Windows-based evaluation software with simple graphical user interface
    • On-board PLL loop filter
    • Easy access to digital I/O and diagnostic signals via I/O header
    • Status LEDs for diagnostic sig
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    Product Detail

    The AD9547 is a very low noise DDS-based digital PLL clock synthesizer with up to four reference inputs and up to four outputs. The AD9547 features reference clock validation, automatic holdover, and hitless reference clock switching. The AD9547 is capable of accepting reference input clocks as low as 1 kHz. The AD9547 Revision A evaluation board is a compact, easy-to use platform for evaluating all features of the AD9547.

    Resources

    pdf icon

    pdf

    UG-639: Evaluating the AD9547 and AD9548 Digital PLL Clock Synthesizers Download

    931 kB

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    XLS

    AD9547 Bill of Materials (Rev.A) Download

    54 K

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    AD9547 Artwork (Rev.A) Download

    805.45 K

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    XLS

    AD9547/AD9548 Evaluation Board Profile Designer Download

    381 K

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    AD9547 Schematic (Rev.A) Download

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    Software

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    AD9547/AD9548 Evaluation Board USB Flash Programmer Readme Download

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    AD9547/AD9548 Evaluation Software Installer Download

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    Evaluation Board USB Flash Programmer Download

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    Evaluation Kits1

    EVAL-AD9547

    AD9547 Evaluation Board

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