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ADF4118BRU Fiches technique(PDF) 1 Page - Analog Devices

No de pièce ADF4118BRU
Description  RF PLL Frequency Synthesizers
Download  20 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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ADF4118BRU Fiches technique(HTML) 1 Page - Analog Devices

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REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADF4116/ADF4117/ADF4118
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
RF PLL Frequency Synthesizers
FEATURES
ADF4116: 550 MHz
ADF4117: 1.2 GHz
ADF4118: 3.0 GHz
2.7 V to 5.5 V Power Supply
Separate VP Allows Extended Tuning Voltage in 3 V
Systems
Selected Charge Pump Currents
Dual Modulus Prescaler
ADF4116: 8/9
ADF4117/ADF4118: 32/33
3-Wire Serial Interface
Digital Lock Detect
Power-Down Mode
Fast Lock Mode
APPLICATIONS
Base Stations for Wireless Radio (GSM, PCS, DCS,
CDMA, WCDMA)
Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANS
Communications Test Equipment
CATV Equipment
GENERAL DESCRIPTION
The ADF4116 family of frequency synthesizers can be used
to implement local oscillators in the up-conversion and down-
conversion sections of wireless receivers and transmitters. They
consist of a low-noise digital PFD (Phase Frequency Detector),
a precision charge pump, a programmable reference divider,
programmable A and B counters and a dual-modulus prescaler
(P/P+1). The A (5-bit) and B (13-bit) counters, in conjunction
with the dual modulus prescaler (P/P+1), implement an N
divider (N = BP+A). In addition, the 14-bit reference counter
(R Counter), allows selectable REFIN frequencies at the PFD
input. A complete PLL (Phase-Locked Loop) can be imple-
mented if the synthesizer is used with an external loop filter and
VCO (Voltage Controlled Oscillator).
Control of all the on-chip registers is via a simple 3-wire interface.
The devices operate with a power supply ranging from 2.7 V to
5.5 V and can be powered down when not in use.
FUNCTIONAL BLOCK DIAGRAM
REFERENCE
FLO
SWITCH
N = BP + A
FUNCTION
LATCH
PRESCALER
P/P +1
13-BIT
B COUNTER
5-BIT
A COUNTER
14-BIT
R COUNTER
21-BIT
INPUT REGISTER
R COUNTER
LATCH
A, B COUNTER
LATCH
PHASE
FREQUENCY
DETECTOR
CHARGE
PUMP
M3
M2
M1
HIGH Z
MUX
MUXOUT
CP
FLO
AVDD
SDOUT
18
13
14
19
SDOUT
FROM
FUNCTION LATCH
5
DGND
AGND
CE
RFINB
RFINA
LE
DATA
CLK
REFIN
CPGND
VP
DVDD
AVDD
LOCK
DETECT
ADF4116/ADF4117/ADF4118
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