Datasheet

Data Sheet ADF4351
Rev. 0 | Page 9 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
–160
–150
–140
–120
–100
–80
–130
–110
–90
–70
–60
–50
–40
1k 10k 100k 1M 10M
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
09800-104
Figure 4. Open-Loop VCO Phase Noise, 2.2 GHz
–160
–150
–140
–120
–100
–80
–130
–110
–90
–70
–60
–50
–40
1k 10k 100k 1M 10M
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
09800-105
Figure 5. Open-Loop VCO Phase Noise, 3.3 GHz
–160
–150
–140
–120
–100
–80
–130
–110
–90
–70
–60
–50
–40
1k 10k 100k 1M 10M
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
09800-106
Figure 6. Open-Loop VCO Phase Noise, 4.4 GHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
1k 10k 100k 1M 10M
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
09800-107
Figure 7. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 2.2 GHz, PFD = 25 MHz, Loop Filter Bandwidth = 63 kHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
1k 10k 100k 1M 10M
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
09800-108
Figure 8. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 3.3 GHz, PFD = 25 MHz, Loop Filter Bandwidth = 63 kHz
–170
–160
–150
–140
–130
–120
–110
–100
–90
1k 10k 100k 1M 10M
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
09800-109
Figure 9. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 4.4 GHz, PFD = 25 MHz, Loop Filter Bandwidth = 63 kHz