Datasheet
ADF4350
Rev. A | Page 9 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
–150
–160
–140
–120
–100
–80
–130
–110
–90
–70
–60
–50
–
40
1k 10k 100k 1M 10M 100M
07325-028
FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
Figure 4. Open-Loop VCO Phase Noise, 2.2 GHz
1k 10k 100k 1M 10M 100M
07325-029
FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
–150
–160
–140
–120
–100
–80
–130
–110
–90
–70
–60
–50
–
40
Figure 5. Open-Loop VCO Phase Noise, 3.3 GHz
–140
–120
–100
–80
–130
–160
–150
–110
–90
–70
–60
–50
–
40
1k 10k 100k 1M 10M 100M
07325-030
FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
Figure 6. Open-Loop VCO Phase Noise, 4.4 GHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
–
70
–80
1k 10k 100k 1M 10M 100M
07325-031
FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
FUND
DIV2
DIV4
DIV8
DIV16
Figure 7. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 2.2 GHz, PFD = 25 MHz, Loop Bandwidth = 40 kHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
–
70
–80
PHASE NOISE (dBc/Hz)
FUND
DIV2
DIV4
DIV8
DIV16
1k 10k 100k 1M 10M 100M
07325-032
FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
Figure 8. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 3.3 GHz, PFD = 25 MHz, Loop Bandwidth = 40 kHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
–
70
–80
FUND
DIV2
DIV4
DIV8
DIV16
1k 10k 100k 1M 10M 100M
07325-033
FREQUENCY (Hz)
PHASE NOISE (dBc/Hz)
Figure 9. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 4.4 GHz, PFD = 25 MHz, Loop Bandwidth = 40 kHz