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Analog Devices - 14-Output Clock Generator

Numéro de référence AD9516-4
Description 14-Output Clock Generator
Fabricant Analog Devices 
Logo Analog Devices 





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AD9516-4 fiche technique
Data Sheet
14-Output Clock Generator with
Integrated 1.6 GHz VCO
AD9516-4
FEATURES
Low phase noise, phase-locked loop (PLL)
On-chip VCO tunes from 1.45 GHz to 1.80 GHz
External VCO/VCXO to 2.4 GHz optional
1 differential or 2 single-ended reference inputs
Reference monitoring capability
Automatic revertive and manual reference
switchover/holdover modes
Accepts LVPECL, LVDS, or CMOS references to 250 MHz
Programmable delays in path to PFD
Digital or analog lock detect, selectable
6 pairs of 1.6 GHz LVPECL outputs
Each output pair shares a 1-to-32 divider with coarse
phase delay
Additive output jitter: 225 fs rms
Channel-to-channel skew paired outputs of <10 ps
4 pairs of 800 MHz LVDS clock outputs
Each output pair shares two cascaded 1-to-32 dividers
with coarse phase delay
Additive output jitter: 275 fs rms
Fine delay adjust (Δt) on each LVDS output
Each LVDS output can be reconfigured as two 250 MHz
CMOS outputs
Automatic synchronization of all outputs on power-up
Manual output synchronization available
64-lead LFCSP
APPLICATIONS
Low jitter, low phase noise clock distribution
10/40/100 Gb/sec networking line cards, including SONET,
Synchronous Ethernet, OTU2/3/4
Forward error correction (G.710)
Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs
High performance wireless transceivers
ATE and high performance instrumentation
GENERAL DESCRIPTION
The AD9516-41 provides a multi-output clock distribution
function with subpicosecond jitter performance, along with an on-
chip PLL and VCO. The on-chip VCO tunes from 1.45 GHz to
1.80 GHz. Optionally, an external VCO/VCXO of up to 2.4 GHz
can be used.
The AD9516-4 emphasizes low jitter and phase noise to
maximize data converter performance, and it can benefit other
applications with demanding phase noise and jitter requirements.
FUNCTIONAL BLOCK DIAGRAM
CP LF
REFIN
REF1
REF2
STATUS
MONITOR
VCO
CLK
DIVIDER
AND MUXs
DIV/Φ
LVPECL
DIV/Φ
LVPECL
DIV/Φ
DIV/Φ
DIV/Φ
DIV/Φ
DIV/Φ
LVPECL
Δt
Δt
LVDS/CMOS
Δt
Δt
LVDS/CMOS
SERIAL CONTROL PORT
AND
DIGITAL LOGIC
AD9516-4
Figure 1.
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
The AD9516-4 features six LVPECL outputs (in three pairs)
and four LVDS outputs (in two pairs). Each LVDS output can
be reconfigured as two CMOS outputs. The LVPECL outputs
operate to 1.6 GHz, the LVDS outputs operate to 800 MHz, and
the CMOS outputs operate to 250 MHz.
Each pair of outputs has dividers that allow both the divide
ratio and coarse delay (or phase) to be set. The range of division
for the LVPECL outputs is 1 to 32. The LVDS/CMOS outputs
allow a range of divisions, up to a maximum of 1024.
The AD9516-4 is available in a 64-lead LFCSP and can be
operated from a single 3.3 V supply. An external VCO, which
requires an extended voltage range, can be accommodated
by connecting the charge pump supply (VCP to 5 V. A separate
LVPECL power supply can be from 2.5 V to 3.3 V (nominal).
The AD9516-4 is specified for operation over the industrial
range of −40°C to +85°C.
1 AD9516 is used throughout to refer to all the members of the AD9516
family. However, when AD9516-4 is used, it refers to that specific member
of the AD9516 family.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2007–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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