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Dual RF/IF PLL Frequency Synthesizers
ADF4210/ADF4211/ADF4212/ADF4213
GENERAL DESCRIPTION
FEATURES
The ADF4210/ADF4211/ADF4212/ADF4213 is a dual frequency
synthesizer that can be used to implement local oscillators (LO)
in the upconversion and downconversion sections of wireless
receivers and transmitters. They can provide the LO for both
the RF and IF sections. They consist of a low-noise digital PFD
(Phase Frequency Detector), a precision charge pump, a pro-
grammable reference divider, programmable A and B Counters
and a dual-modulus prescaler (P/P + 1). The A (6-bit) and B
(12-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 implemented if the synthesizer is used with
an external loop filter and VCO (Voltage Controlled Oscillators).
ADF4210: 550 MHz/1.2 GHz
ADF4211: 550 MHz/2.0 GHz
ADF4212: 1.0 GHz/2.7 GHz
ADF4213: 1.0 GHz/3 GHz
2.7 V to 5.5 V Power Supply
Separate Charge Pump Supply (VP) Allows Extended
Tuning Voltage in 3 V Systems
Programmable Dual Modulus Prescaler
RF and IF: 8/9, 16/17, 32/33, 64/65
Programmable Charge Pump Currents
3-Wire Serial Interface
Analog and Digital Lock Detect
Fastlock Mode
Power-Down Mode
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 V and can be powered down when not in use.
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
FUNCTIONAL BLOCK DIAGRAM
V
1
V
2
V 1
V 2
R
SET
DD
DD
P
P
12-BIT IF
B-COUNTER
REFERENCE
PHASE
COMPARATOR
IF
IN
IF
PRESCALER
CHARGE
PUMP
CP
IF
8-BIT IF
A-COUNTER
IF CURRENT
SETTING
IF
LOCK
DETECT
IFCP3 IFCP2 IFCP1
OSCILLATOR
REF
IN
14-BIT IF
R-COUNTER
OUTPUT
MUX
MUXOUT
CLOCK
DATA
LE
24-BIT
DATA
REGISTER
SDOUT
RFCP3 RFCP2 RFCP1
14-BIT RF
R-COUNTER
RF
LOCK
IF CURRENT
SETTING
DETECT
12-BIT RF
B-COUNTER
CHARGE
PUMP
CP
FL
RF
RF
IN
RF
PRESCALER
PHASE
COMPARATOR
REFERENCE
6-BIT RF
A-COUNTER
R
ADF4210/ADF4211/
ADF4212/ADF4213
SET
FL SWITCH
O
O
DGND
RF
AGND
RF
DGND
IF
DGND
IF
AGND
IF
REV. A
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reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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Tel: 781/329-4700
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© Analog Devices, Inc., 2001