Datasheet

ADF4007 Data Sheet
Rev. B | Page 12 of 16
USING THE ADF4007 AS A DIVIDER
In addition to its use as a standard PLL synthesizer, the ADF4007
can also be used as a high frequency counter/divider with a value
of 8, 16, 32, or 64.This can prove useful in a wide variety of
applications where a higher frequency signal is readily available.
Figure 14 shows the ADF4007 used in this manner with the
ADF4360-7.
This part is an integrated synthesizer and VCO, in this case
operating over a range of 1200 MHz to 1500 MHz. With divide-
by-8 chosen in the ADF4007 (N2 = 0, N1 = 0), the output range
is 150 MHz to 187.50 MHz.
ADF4360-7
ADF4007
470pF
6.8nF
6.2kΩ
13kΩ
220pF
CLK
DATA
LE
4.7kΩ
R
SET
CP
V
TUNE
17
18
RF
OUT
A
1nF
C
C
CPGND AGND DGND
AV
DD
DV
DD
V
VCO
C
N
10mF
V
VCO
CE
REF
IN
FREF
IN
1nF
MUXOUT
LOCK
DETECT
RF
IN
B
V
P
AV
DD
100pF
100pF
V
VCO
CMOS OUTPUT
51Ω
19
12
13
1
3
10
8
11
22
15
5
4
7
24
20
23
2
21
6
14
16
9
L2
51Ω
2.2nH
MUXOUT
REF
IN
PHASE
FREQUENCY
DETECTOR
MUX
CHARGE
PUMP
CP
R COUNTER
÷ 2
R
SET
N COUNTER
÷ 8, ÷ 16
÷ 32, ÷ 64
N1
N2
CPGND
GND
M2 M1
4.7kΩ
V
DD
SPI COMPATIBLE SERIAL BUS
RF
OUT
B
2.2nH
L1
1nF
V
DD
RF
IN
A
51Ω
04537-020
DV
DD
Figure 14. Using the ADF4007 to Divide-Down the Output of the ADF4360-7