ADF4355BCPZ datasheet(12/36 Pages) AD

12 / 36 page

Data Sheet

ADF4355

Rev. A | Page 11 of 35

0.8

1.8

2.8

3.8

4.8

5.8

6.8

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

OUTPUT FREQUENCY (GHz)

RMS JITTER (ps) 1kHz TO 20MHz

RMS JITTER (ps) 12kHz TO 20MHz

Figure 16. RMS Jitter vs. Output Frequency, PFD Frequency = 61.44 MHz,

Loop Filter = 20 kHz

–110

–100

–90

–80

–70

–60

–50

RFOUTA+/RFOUTA– OUTPUT FREQUENCY (GHz)

PFD = 15.36MHz

PFD = 30.72MHz

PFD = 61.44MHz

Figure 17. PFD Spur Amplitude vs. RFOUTA+/RFOUTA− Output Frequency,

PFD = 15.36 MHz, PFD = 30.72 MHz, PFD = 61.44 MHz, Loop Filter = 20 kHz

10k

100k

10M

100M

FREQUENCY (Hz)

–160

–150

–140

–130

–120

–110

–100

–90

–80

Figure 18. Fractional-N Spur Performance, GSM1800 Band, RFOUTA+ =

1550.2 MHz, REFIN = 122.88 MHz, PFD = 61.44 MHz, Output Divide by 4

Selected, Loop Filter Bandwidth = 20 kHz, Channel Spacing = 20 kHz

10k

100k

10M

100M

FREQUENCY (Hz)

–160

–150

–140

–130

–120

–110

–100

–90

–80

Figure 19. Fractional-N Spur Performance, W-CDMA Band, RFOUTA+ =

2113.5 MHz, REFIN = 122.88 MHz, PFD = 61.44 MHz, Output Divide by 2

Selected, Loop Filter Bandwidth = 20 kHz, Channel Spacing = 20 kHz

10k

100k

10M

100M

FREQUENCY (Hz)

–160

–150

–140

–130

–120

–110

–100

–90

–80

Figure 20. Fractional-N Spur Performance, RFOUTA+ = 2.591 GHz,

REFIN = 122.88 MHz, PFD = 61.44 MHz, Output Divide-by-2 Selected,

Loop Filter Bandwidth = 20 kHz, Channel Spacing = 20 kHz

4.65

4.15

–1

4.20

4.25

4.30

4.35

4.40

4.45

4.50

4.55

TIME (ms)

4.60

Figure 21. Lock Time for 250 MHz Jump from 4150 MHz to 4400 MHz,

Loop Bandwidth = 20 kHz

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