High Voltage, Fractional-N/
Integer-N PLL Synthesizer
ADF4150HV
FEATURES
GENERAL DESCRIPTION
Fractional-N synthesizer and integer-N synthesizer
High voltage charge pump: VP = 6 V to 30 V
Tuning range: 1.0 V to 29 V (or 1 V from VP supply rails)
RF bandwidth to 3.0 GHz
Programmable divide-by-1/-2/-4/-8/-16 outputs
Synthesizer power supply: 3.0 V to 3.6 V
Programmable dual-modulus prescaler of 4/5 or 8/9
Programmable output power level
The ADF4150HV is a 3.0 GHz, fractional-N or integer-N
frequency synthesizer with an integrated high voltage charge
pump. The synthesizer can be used to drive external wideband
VCOs directly, eliminating the need for operational amplifiers
to achieve higher tuning voltages. This simplifies design and
reduces cost while improving phase noise, in contrast to active
filter topologies, which tend to degrade phase noise compared
to passive filter topologies.
Programmable charge pump currents
RF output mute function
3-wire serial interface
The VCO frequency can be divided by 1, 2, 4, 8, or 16 to allow
the user to generate RF output frequencies as low as 31.25 MHz.
For applications that require isolation, the RF output stage can be
muted. The mute function is both pin- and software-controllable.
Analog and digital lock detect
APPLICATIONS
A simple 3-wire interface controls all on-chip registers. The
charge pump operates from a power supply ranging from 6 V to
30 V, whereas the rest of the device operates from 3.0 V to 3.6 V.
The ADF4150HV can be powered down when not in use.
Wireless infrastructure
Microwave point-to-point/point-to-multipoint radios
VSAT radios
Test equipment
Private land mobile radios
FUNCTIONAL BLOCK DIAGRAM
SDV
AV
DV
V
R
SET
DD
DD
DD
P
MULTIPLEXER
MUXOUT
LD
10-BIT R
COUNTER
÷2
DIVIDER
×2
REF
DOUBLER
IN
LOCK
DETECT
CLK
DATA
LE
DATA REGISTER
HIGH VOLTAGE
CHARGE
FUNCTION
LATCH
CP
OUT
PUMP
PHASE
COMPARATOR
BOOST
MODE
CURRENT
SETTING
RF
RF
+
–
OUT
OUT
OUTPUT
STAGE
DIVIDE-BY-1/
-2/-4/-8/-16
INTEGER
VALUE
FRACTION
VALUE
MODULUS
VALUE
PDB
RF
THIRD-ORDER
FRACTIONAL
INTERPOLATOR
RF
+
–
RF
INPUT
IN
MULTIPLEXER
RF
IN
N COUNTER
ADF4150HV
CE
GND
CP
SD
GND
GND
Figure 1.
Rev. 0
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