Datasheet

AD9516-4 Data Sheet
Rev. C | Page 20 of 80
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0.1 1 10010
PFD PHASE NOISE REFERRED TO PFD INPUT
(dBc/Hz)
PFD FREQUENCY (MHz)
06423-013
Figure 13. PFD Phase Noise Referred to PFD Input vs. PFD Frequency
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0 2.52.0
1.5 1.00.5
PLL FIGURE OF MERIT (dBc/Hz)
SLEW RATE (V/ns)
06423-136
Figure 14. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/
REFIN
2.1
0.9
1.1
1.3
1.5
1.7
1.9
1.45 1.55
1.65 1.751.50 1.60 1.70 1.80
VCO TUNING VOLTAGE (V)
FREQUENCY (GHz)
06423-201
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.)
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–90
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10
0
CENTER 122.88MHz SPAN 50MHz5MHz/DIV
RELATIVE POWER (dB)
06423-202
Figure 16. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
LBW = 135 kHz; I
CP
= 3 mA; F
VCO
= 1.475 GHz
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–90
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–30
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10
0
CENTER 122.88MHz SPAN 1MHz100kHz/DIV
RELATIVE POWER (dB)
06423-203
Figure 17. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;
LBW = 135 kHz; I
CP
= 3 mA; F
VCO
= 1.475 GHz
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–100
–90
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–60
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–40
–30
–20
–10
10
0
CENTER 122.88MHz SPAN 1MHz100kHz/DIV
RELATIVE POWER (dB)
06423-204
Figure 18. Output Spectrum, LVDS; 122.88 MHz; PFD = 15.36 MHz;
LBW = 135 kHz; I
CP
= 3 mA; F
VCO
= 1.475 GHz