AD9545BCPZ datasheet(1/157 Pages) AD

номер детали	AD9545BCPZ

подробное описание детали	Quad Input, 10-Output, Dual DPLL/IEEE 1588 1 pps Synchronizer and Jitter Cleaner

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Quad Input, 10-Output, Dual DPLL/IEEE 1588

1 pps Synchronizer and Jitter Cleaner

Data Sheet

AD9545

Rev. A

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Tel: 781.329.4700

Technical Support

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FEATURES

Dual DPLL synchronizes 1 Hz to 750 MHz physical layer

clocks providing frequency translation with jitter cleaning

of noisy references

Complies with ITU-T G.8262 and Telcordia GR-253

Supports Telcordia GR-1244, ITU-T G.812, ITU-T G.813, ITU-

T G.823, ITU-T G.824, ITU-T G.825, and ITU-T G.8273.2

Continuous frequency monitoring and reference validation

for frequency deviation as low as 50 ppb (5 × 10−8)

Both DPLLs feature a 24-bit fractional divider with 24-bit

programmable modulus

Programmable digital loop filter bandwidth: 10−4 Hz to 1850 Hz

2 independent, programmable auxiliary NCOs (1 Hz to

65,535 Hz, resolution < 1.37 × 10−12 Hz), suitable for

IEEE 1588 Version 2 servo feedback in PTP applications

Automatic and manual holdover and reference switchover,

providing zero delay, hitless, or phase buildout operation

Programmable priority-based reference switching with

manual, automatic revertive, and automatic nonrevertive

modes supported

5 pairs of clock output pins with each pair useable as

differential LVDS/HCSL/CML or as 2 single-ended outputs

(1 Hz to 500 MHz)

2 differential or 4 single-ended input references

Crosspoint mux interconnects reference inputs to PLLs

Supports embedded (modulated) input/output clock signals

Fast DPLL locking modes

Provides internal capability to combine the low phase noise

of a crystal resonator or crystal oscillator with the

frequency stability and accuracy of a TCXO or OCXO

External EEPROM support for autonomous initialization

Single 1.8 V power supply operation with internal regulation

Built in temperature monitor and alarm and temperature

compensation for enhanced zero delay performance

APPLICATIONS

Global positioning system (GPS), PTP (IEEE 1588), and

synchronous Ethernet (SyncE) jitter cleanup and

synchronization

Optical transport networks (OTN), synchronous digital

hierarchy (SDH), and macro and small cell base stations

Small base station clocking, including baseband and radio

Stratum 2, Stratum 3e, and Stratum 3 holdover, jitter

cleanup, and phase transient control

JESD204B support for analog-to-digital converter (ADC) and

digital-to-analog converter (DAC) clocking

Cable infrastructures

Carrier Ethernet

GENERAL DESCRIPTION

The AD9545 supports existing and emerging International

Telecommunications Union (ITU) standards for the delivery of

frequency, phase, and time of day over service provider packet

networks, including ITU-G.8262, ITU-T G.812, ITU-T G.813,

ITU-T G.823, ITU-T G.824, ITU-T G.825, and ITU-T G.8273.2.

The 10 clock outputs of the AD9545 are synchronized to any

one of up to four input references. The digital phase-locked

loops (DPLLs) reduce timing jitter associated with the external

references. The digitally controlled loop and holdover circuitry

continuously generate a low jitter output signal, even when all

reference inputs fail.

The AD9545 is available in a 48-lead LFCSP (7 mm × 7 mm)

package and operates over the −40°C to +85°C temperature range.

Note that throughout this data sheet, multifunction pins, such

as SDO/M5, are referred to either by the entire pin name or by a

single function of the pin, for example, M5, when only that

function is relevant.

Аналогичный номер детали - AD9545BCPZ

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Analog Devices	AD9540	485Kb / 32P	655 MHz Low Jitter Clock Generator 7/04-Revision 0
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	AD9540BCPZ	588Kb / 32P	655 MHz Low Jitter Clock Generator 4/2018-Rev. B to Rev. C
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