AD9520-4 Datasheet, PDF (23/84 Pages) Analog Devices – 12 LVPECL/24 CMOS Output Clock Generator with Integrated 1.6 GHz VCO

1.0
0.6
0.2
–0.2
–0.6
–1.0
0
0.5
1.0
1.5
TIME (ns)
Figure 18. LVPECL Differential Voltage Swing @ 1600 MHz
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
0 10 20 30 40 50 60 70 80 90 100
TIME (ns)
Figure 19. CMOS Output with 10 pF Load @ 25 MHz
3.2
2pF LOAD
2.8
10pF
2.4
LOAD
2.0
1.6
1.2
0.8
0.4
0
0 1 2 3 4 5 6 7 8 9 10
TIME (ns)
Figure 20. CMOS Output with 2 pFand 10 pF Load @ 250 MHz
AD9520-4
2.0
1.8
1.6
1.4
1.2
1.0
0
0.5
1.0
1.5
2.0
2.5
3.0
FREQUENCY (GHz)
Figure 21. LVPECL Differential Voltage Swing vs. Frequency
4.0
3.5
3.0
2pF
2.5
2.0
10pF
1.5
20pF
1.0
0.5
0
0
100
200
300
400
500
600
700
FREQUENCY (MHz)
Figure 22. CMOS Output Swing vs. Frequency and Capacitive Load
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
Figure 23. Internal VCO Phase Noise (Absolute), Direct-to-LVPECL @ 1450 MHz
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