AD9517-2ABCPZ datasheet(21/80 Pages) AD

21 / 80 page

Data Sheet

AD9517-2

Rev. F | Page 21 of 80

–140

–145

–150

–155

–160

–165

–170

0.1

100

PFD FREQUENCY (MHz)

Figure 13. PFD Phase Noise Referred to PFD Input vs. PFD Frequency

–210

–224

–222

–220

–218

–216

–214

–212

02.5

2.0

1.5

1.0

0.5

SLEW RATE (V/ns)

Figure 14. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/REFIN

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

2.0

2.4

2.3

2.2

2.1

FREQUENCY (GHz)

Figure 15. VCO Tuning Voltage vs. Frequency

(Note that VCO calibration centers the dc tuning voltage

for the PLL setup that is active during calibration.)

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

CENTER 122.88MHz

SPAN 50MHz

5MHz/DIV

Figure 16. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;

LBW = 138 kHz; ICP = 3.0 mA; fVCO = 2.21 GHz

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

CENTER 122.88MHz

SPAN 1MHz

100kHz/DIV

Figure 17. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;

LBW = 138 kHz; ICP = 3.0 mA; fVCO = 2.21 GHz

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

CENTER 122.88MHz

SPAN 1MHz

100kHz/DIV

Figure 18. Output Spectrum, LVDS; 122.88 MHz; PFD = 15.36 MHz;

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