ADF4360-2BCPRL Analog Devices Inc, ADF4360-2BCPRL Datasheet - Page 20

• Manufacturer Part Number: ADF4360-2BCPRL
• Description: IC,FREQUENCY SYNTHESIZER,BICMOS,LLCC,24PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Type: Fanout Distribution, Integer N Synthesizer (RF)r

Specifications of ADF4360-2BCPRL

• Rohs Status: RoHS non-compliant
• Pll: Yes
• Input: CMOS
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 1:2
• Differential - Input:output: No/No
• Frequency - Max: 2.17GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-LFCSP
• Frequency-max: 2.15GHz
• For Use With: EVAL-ADF4360-2EBZ1 - BOARD EVALUATION FOR ADF4360-2

ADF4360-2
APPLICATIONS
DIRECT CONVERSION MODULATOR
Direct conversion architectures are increasingly being used to
implement base station transmitters. Figure 17 shows how ADI
parts can be used to implement such a system.
The circuit block diagram shows the
used with the AD8349. The use of dual integrated DACs, such
as the
and offset matching characteristics, ensures minimum error
contribution (over temperature) from this portion of the signal
chain.
The local oscillator is implemented using the ADF4360-2. The
low-pass filter was designed using ADIsimPLL™ for a channel
spacing of 100 kHz and an open-loop bandwidth of 10 kHz.
The frequency range of the ADF4360-2 (1.85 GHz to 2.17 GHz)
makes it ideally suited for the implementation of a W-CDMA
transceiver.
FREF
AD9761
MODULATED
DIGITAL
DATA
IN
1nF
10µF
1nF
4.7kΩ
with its specified ±0.02 dB and ±0.004 dB gain
1nF
51Ω
2kΩ
REFIO
FSADJ
14
16
17
18
19
12
13
CPGND
C
REF
CLK
DATA
LE
C
R
1
V
V
N
C
SET
VCO
VCO
6
IN
3
AD9761
TxDAC
DV
8
21
DD
AGND
9
ADF4360-2
AV
V
DD
10
2
DD
AD9761
QOUTB
QOUTA
IOUTB
IOUTA
11
CE MUXOUT
23
22
DETECT
LOCK
DGND RF
15
20
TxDAC® being
RF
V
OUT
OUT
TUNE
CP
Figure 17. Direct Conversion Modulator
B
A
24
7
4
5
LOW-PASS
LOW-PASS
V
VCO
47nH
FILTER
FILTER
470pF
Rev. B | Page 20 of 24
6.8kΩ
13kΩ
6.8nF
47nH
The LO ports of the
from the complementary RF
ADF4360-2. This gives better performance than a single-ended
LO driver and eliminates the often necessary use of a balun to
convert from a single-ended LO input to the more desirable
differential LO inputs for the AD8349. The typical rms phase
noise (100 Hz to 100 kHz) of the LO in this configuration is 2.1°.
The
The optimum LO power can be software programmed on the
ADF4360-2, which allows levels from −13 dBm to −6 dBm from
each output.
The RF output is designed to drive a 50 Ω load but must be ac-
coupled, as shown in Figure 17. If the I and Q inputs are driven
in quadrature by 2 V p-p signals, the resulting output power
from the modulator is approximately 2 dBm.
1.8pF
1.8pF
220pF
AD8349
3.6nH
3.6nH
accepts LO drive levels from −10 dBm to 0 dBm.
AD8349
QBBP
QBBN
IBBN
IBBP
LOIP
LOIN
SPLITTER
PHASE
OUT
VPS1
can be driven differentially
A and RF
AD8349
VPS2
OUT
B outputs of the
RF PA
TO
100pF