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Analog Devices - Low Jitter Clock Generator

Numéro de référence AD9525
Description Low Jitter Clock Generator
Fabricant Analog Devices 
Logo Analog Devices 





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AD9525 fiche technique
Data Sheet
FEATURES
Integrated ultralow noise synthesizer
8 differential 3.6 GHz LVPECL outputs and 1 LVPECL SYNC
output or 2 CMOS SYNC outputs
2 differential reference inputs and 1 single-ended reference
input
APPLICATIONS
LTE and multicarrier GSM base stations
Clocking high speed ADCs, DACs
ATE and high performance instrumentation
40/100 Gb/sec OTN line side clocking
Cable/DOCSIS CMTS clocking
Test and measurement
GENERAL DESCRIPTION
The AD9525 is designed to support converter clock requirements
for long-term evolution (LTE) and multicarrier GSM base station
designs.
The AD9525 provides a low power, multioutput, clock distribution
function with low jitter performance, along with an on-chip PLL
that can be used with an external VCO or VCXO. The VCO input
and eight LVPECL outputs can operate up to a frequency of
3.6 GHz. All outputs share a common divider that can provide
a division of 1 to 6.
Low Jitter Clock Generator
with Eight LVPECL Outputs
AD9525
REFA
REFA
REFB
REFB
REFC
CLKIN
CLKIN
FUNCTIONAL BLOCK DIAGRAM
AD9525
PLL ÷S
DIVIDERS
SPI CONTROL
Figure 1.
SYNC_OUT
SYNC_OUT
OUT7
OUT7
OUT6
OUT6
OUT5
OUT5
OUT4
OUT4
OUT3
OUT3
OUT2
OUT2
OUT1
OUT1
OUT0
OUT0
The AD9525 offers a dedicated output that can be used to provide
a programmable signal for resetting or synchronizing a data
converter. The output signal is activated by a SPI write.
The AD9525 is available in a 48-lead LFCSP and can be operated
from a single 3.3 V supply. The external VCXO or VCO can
have an operating voltage of up to 5.5 V.
The AD9525 operates over the extended industrial temperature
range of −40°C to +85°C.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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 ©2012–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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