Datasheet

ADF4116/ADF4117/ADF4118
Rev. D | Page 22 of 28
VCO190-902T
V
CC
18Ω
100pF
100pF
18Ω
18Ω
RF
OUT
V
DD
V
P
AV
DD
DV
DD
ADF4117/
ADF4118
V
P
0.15nF
620pF
3.3kΩ
71516
2
14
6
5
8
F
REFIN
1000pF
1000pF
51Ω*
*TO BE USED WHEN GENERATOR SOURCE IMPEDANCE IS 50Ω.
MUXOUT
LOCK
DETECT
51Ω**
100pF
34 9
100pF
CPGND AGND DGND
RF
IN
A
RF
IN
B
CE
CLK
DATA
LE
SPI-COMPATIBLE SERIAL BUS
DECOUPLING CAPACITORS ON AV
DD
,DV
DD
, AND V
P
OF THE
ADF4117/ADF4118 AND ON V
CC
OF THE VCO190-920T HAVE BEEN
OMITTED FROM THE DIAGRAM FOR CLARITY.
FL
O
CP
10kΩ
1.5nF
27kΩ
REF
IN
1
00392-035
**OPTIONAL MATCHING RESISTOR DEPENDING ON RF
OUT
FREQUENCY.
Figure 35. Local Oscillator for GSM Base Station
V
DD
V
P
AV
DD
DV
DD
ADF4116/
ADF4117/
ADF4118
V
P
10kΩ
VCO
V
CC
GND
18Ω
100pF
100pF
18Ω
18Ω
RF
OUT
71516
2
1
6
5
8
F
REFIN
51Ω
100pF
349
100pF
CPGND AGND
DGND
RF
IN
A
RF
IN
B
DECOUPLING CAPACITORS AND INTERFACE SIGNALS HAVE
BEEN OMITTED FROM THE DIAGRAM FOR CLARITY.
FL
O
CP
CE
POWER-DOWN CONTROL
V
DD
S
IN
DGND
LOOP
FILTER
ADG702
REF
IN
00392-036
Figure 36. Local Oscillator Shutdown Circuit