AD9549 - Dual Input Network Clock Generator/Synchronizer

Analog Devices

General Description

The AD9549 provides synchronization for many systems, including synchronous optical networks (SONET/SDH).

The AD9549 generates an output clock, synchronized to one of two external input references.

The external references may contain significant time jitter, also specified as phase noise.

Key Features

Flexible reference inputs Input frequencies: 8 kHz to 750 MHz Two reference inputs Loss of reference indicators Auto and manual holdover modes Auto and manual switchover modes Smooth A-to-B phase transition on outputs Excellent stability in holdover mode Programmable 16 + 1-bit input divider, R Differential HSTL clock output Output frequencies to 750 MHz Low jitter clock doubler for frequencies of >400 MHz Single-ended CMOS output for frequencies of.

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AD9549 dual input network clock generator/synchronizer by Analog Devices - Datasheet Preview

Datasheet Details

Part number	AD9549
Manufacturer	Analog Devices
File Size	1.08 MB
Description	Dual Input Network Clock Generator/Synchronizer
Datasheet	AD9549 Datasheet

Full PDF Text Transcription for AD9549 (Reference)

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FEATURES Flexible reference inputs Input frequencies: 8 kHz to 750 MHz Two reference inputs Loss of reference indicators Auto and manual holdover modes Auto and manual sw...

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reference indicators Auto and manual holdover modes Auto and manual switchover modes Smooth A-to-B phase transition on outputs Excellent stability in holdover mode Programmable 16 + 1-bit input divider, R Differential HSTL clock output Output frequencies to 750 MHz Low jitter clock doubler for frequencies of >400 MHz Single-ended CMOS output for frequencies of <150 MHz Programmable digital loop filter (<1 Hz to ~100 kHz) High speed digitally controlled oscillator (DCO) core Direct digital synthesizer (DDS) with integrated 14-bit DAC Excellent dynamic performance Programmable 16 + 1-bit feedback divider, S Software controll

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