ADF4252BCPZ-R7 datasheet(10/30 Pages) AD

10 / 30 page

ADF4252

Data Sheet

Rev. E | Page 10 of 30

For Figure 16 to Figure 21, across all fractional channel steps from f = 0/130 to f = 129/130, RFOUT = 1.45 GHz, INT = 55, REFIN = 26 MHz,

and loop bandwidth = 40 kHz. Plots attained using the EVAL-ADF4252EB2 evaluation board.

FREQUENCY (GHz)

–70

–120

1.435

1.440

1.445

1.450

1.455

–75

–90

–105

–110

–115

–80

–85

–95

–100

LOWEST SPUR MODE

LOW NOISE AND SPUR MODE

LOWEST NOISE MODE

Figure 16. In-Band Phase Noise vs. Frequency

FREQUENCY (GHz)

–10

–110

11.435

1.440

1.445

1.450

1.455

–20

–50

–80

–90

–100

–30

–40

–60

–70

LOWEST NOISE MODE

LOWEST SPUR MODE

Figure 17. 100 kHz Spur vs. Frequency

FREQUENCY (GHz)

–20

–120

11.435

1.440

1.445

1.450

1.455

–30

–60

–90

–100

–110

–40

–50

–70

–80

LOWEST NOISE MODE

LOWEST SPUR MODE

Figure 18. 200 kHz Spur vs. Frequency

FREQUENCY (GHz)

–20

–120

1.435

1.440

1.445

1.450

1.455

–30

–60

–90

–100

–110

–40

–50

–70

–80

LOWEST NOISE MODE

LOWEST SPUR MODE

Figure 19. 400 kHz Spur vs. Frequency

FREQUENCY (GHz)

–20

–120

1.435

1.440

1.445

1.450

1.455

–30

–60

–90

–100

–110

–40

–50

–70

–80

LOWEST NOISE MODE

LOWEST SPUR MODE

Figure 20. 600 kHz Spur vs. Frequency

FREQUENCY (GHz)

–20

–120

1.435

1.440

1.445

1.450

1.455

–30

–60

–90

–100

–110

–40

–50

–70

–80

LOWEST NOISE MODE

LOWEST SPUR MODE

Figure 21. 3 MHz Spur vs. Frequency

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