Datasheet

REV. B–10–
ADF4252
FREQUENCY (GHz)
0
–35
061
AMPLITUDE (dBm)
2345
–5
–10
–15
–25
–30
–20
PRESCALER = 4/5
PRESCALER = 8/9
TPC 19. RF Input Sensitivity
IF INPUT FREQUENCY (GHz)
0
5
35
–0.4 1.60.1
IF INPUT POWER (dBm)
0.6 1.1
15
20
25
30
10
40
V
DD
= 3V
V
P
2 = 3V
TPC 20. IF Input Sensitivity
PHASE DETECTOR FREQUENCY (Hz)
–120
–130
–180
10k
10M
100k
PHASE NOISE (dB/Hz)
1M
–150
–160
–170
–140
V
DD
= 3V
V
P
= 5V
TPC 21. Phase Noise (Referred to CP Output) vs.
PFD Frequency, RF Side
PHASE DETECTOR FREQUENCY (Hz)
–120
–130
–180
10k 10M100k
PHASE NOISE (dB/Hz)
1M
–150
–160
–170
–140
V
DD
= 3V
V
P
= 3V
TPC 22. Phase Noise (Referred to CP Output) vs.
PFD Frequency, IF Side
V
CP
(V)
6
4
0 0.5
I
CP
(mA)
1.5
0
–2
–4
2
–6
V
DD
= 3V
V
P
1 = 5.5V
1.0 2.0 3.0
2.5
4.03.5 4.5 5.5
5.0
TPC 23. RF Charge Pump Output Characteristics
V
CP
(V)
6
4
0
0.5
I
CP
(mA)
1.5
0
–2
–4
2
–6
V
DD
= 3V
V
P
2 = 3V
1.0 2.0 3.0
2.5
TPC 24. IF Charge Pump Output Characteristics