Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 4. Open-Loop VCO Phase Noise, 2.2 GHz
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 5. Open-Loop VCO Phase Noise, 3.3 GHz
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 6. Open-Loop VCO Phase Noise, 4.4 GHz
ADF4351
–90
–100
–110
–120
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
–130
–140
–150
–160
–170
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 7. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 2.2 GHz, PFD = 25 MHz, Loop Filter Bandwidth = 63 kHz
–90
–100
–110
–120
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
–130
–140
–150
–160
–170
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 8. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 3.3 GHz, PFD = 25 MHz, Loop Filter Bandwidth = 63 kHz
–90
–100
–110
–120
DIV1
DIV2
DIV4
DIV8
DIV16
DIV32
DIV64
–130
–140
–150
–160
–170
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 9. Closed-Loop Phase Noise, Fundamental VCO and Dividers,
VCO = 4.4 GHz, PFD = 25 MHz, Loop Filter Bandwidth = 63 kHz
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