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Numéro de référence | ADF4007 | ||
Description | High Frequency Divider/PLL Synthesizer | ||
Fabricant | Analog Devices | ||
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1 Page
Data Sheet
High Frequency Divider/PLL Synthesizer
ADF4007
FEATURES
7.5 GHz bandwidth
Maximum PFD frequency of 120 MHz
Divide ratios of 8, 16, 32, or 64
2.7 V to 3.3 V power supply
Separate charge pump supply (VP) allows extended tuning
voltage in 3 V systems
RSET control of charge pump current
Hardware power-down mode
APPLICATIONS
Satellite communications
Broadband wireless access
CATV
Instrumentation
Wireless LANs
GENERAL DESCRIPTION
The ADF4007 is a high frequency divider/PLL synthesizer that
can be used in a variety of communications applications. It can
operate to 7.5 GHz on the RF side and to 120 MHz at the PFD.
It consists of a low noise digital PFD (phase frequency detector), a
precision charge pump, and a divider/prescaler. The divider/
prescaler value can be set by two external control pins to one of
four values (8, 16, 32, or 64). The reference divider is permanently
set to 2, allowing an external REFIN frequency of up to 240 MHz.
A complete PLL (phase-locked loop) can be implemented if the
synthesizer is used with an external loop filter and a VCO (voltage
controlled oscillator). Its very high bandwidth means that
frequency doublers can be eliminated in many high frequency
systems, simplifying system architecture and reducing cost.
FUNCTIONAL BLOCK DIAGRAM
VDD
VP CPGND RSET
REFIN
ADF4007
R COUNTER
÷2
PHASE
FREQUENCY
DETECTOR
REFERENCE
CHARGE
PUMP
CP
RFINA
RFINB
N COUNTER
÷ 8, ÷ 16,
÷ 32, ÷ 64
MUX
MUXOUT
N2 N1
GND
Figure 1.
M2 M1
Rev. B
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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
www.analog.com
Fax: 781.461.3113 ©2004–2012 Analog Devices, Inc. All rights reserved.
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Pages | Pages 17 | ||
Télécharger | [ ADF4007 ] |
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