AD9517-1 Analog Devices, Inc., AD9517-1 Datasheet - Page 20

• Manufacturer Part Number: AD9517-1
• Description: 12-output Clock Generator With Integrated 2.5 Ghz Vco
• Manufacturer: Analog Devices, Inc.

AD9517-1
Figure 13. PFD Phase Noise Referred to PFD Input vs. PFD Frequency
Figure 14. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/ REFIN
–210
–212
–214
–216
–218
–220
–222
–224
–140
–145
–150
–155
–160
–165
–170
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
2.3
0.1
0
Figure 15. VCO Tuning Voltage vs. Frequency
0.5
2.4
PFD FREQUENCY (MHz)
1
FREQUENCY (GHz)
SLEW RATE (V/ns)
1.0
2.5
1.5
10
2.6
2.0
2.5
2.7
100
Rev. 0 | Page 20 of 80
Figure 17. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;
Figure 18. Output Spectrum, LVDS; 122.88 MHz; PFD = 15.36 MHz;
–100
–110
–100
–110
–100
–110
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
10
10
10
0
Figure 16. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
0
0
CENTER 122.88MHz
CENTER 122.88MHz
CENTER 122.88MHz
LBW = 55 kHz; I
LBW = 55 kHz; I
LBW = 55 kHz; I
CP
CP
CP
= 4.8 mA; F
= 4.8 mA; F
= 4.8 mA; F
100kHz/DIV
100kHz/DIV
5MHz/DIV
VCO
VCO
VCO
= 2.46 GHz
= 2.46 GHz
= 2.46 GHz
SPAN 50MHz
SPAN 1MHz
SPAN 1MHz