AD9518-4A-PCBZ AD [Analog Devices], AD9518-4A-PCBZ Datasheet - Page 17

• Manufacturer Part Number: AD9518-4A-PCBZ
• Description: 6-Output Clock Generator with Integrated 1.6 GHz VCO
• Manufacturer: AD [Analog Devices]

Data Sheet
Figure 13. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;
–100
–110
–100
–110
2.1
1.9
1.7
1.5
1.3
1.1
0.9
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
10
10
1.45
(Note that VCO calibration centers the dc tuning voltage
0
Figure 12. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
0
CENTER 122.88MHz
CENTER 122.88MHz
for the PLL setup that is active during calibration.)
Figure 11. VCO Tuning Voltage vs. Frequency
LBW = 135 kHz; I
LBW = 135 kHz; I
1.50
1.55
FREQUENCY (GHz)
CP
CP
1.60
= 3 mA; f
= 3 mA; f
100kHz/DIV
5MHz/DIV
1.65
VCO
VCO
= 1.475 GHz
= 1.475 GHz
1.70
1.75
SPAN 50MHz
SPAN 1MHz
1.80
Rev. B | Page 17 of 64
1600
1400
1200
1000
–0.2
–0.6
–1.0
–0.2
–0.6
–1.0
800
1.0
0.6
0.2
1.0
0.6
0.2
0
0
0
Figure 15. LVPECL Output (Differential) at 1600 MHz
Figure 14. LVPECL Output (Differential) at 100 MHz
Figure 16. LVPECL Differential Swing vs. Frequency,
Using a Differential Probe Across the Output Pair
5
1
FREQUENCY (GHz)
10
TIME (ns)
TIME (ns)
1
15
2
20
AD9518-4
2
2
3
5