AD9522 Analog Devices, Inc., AD9522 Datasheet - Page 22

• Manufacturer Part Number: AD9522
• Description: 12 Lvds/24 Cmos Output Clock Generator With Integrated 2.8 Ghz Vco
• Manufacturer: Analog Devices, Inc.

AD9522-0
–0.1
–0.2
–0.3
–0.4
Figure 20. CMOS Output with 2 pF and 10 pF Load @ 250 MHz
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.4
0.3
0.2
0.1
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
0
0
0
0
Figure 18. LVDS Differential Voltage Swing @ 800 MHz
0
Figure 19. CMOS Output with 10 pF Load @ 25 MHz
Output Terminated 100 Ω Across Differential Pair
10
1
0.5
20
2
30
3
1.0
40
4
TIME (ns)
TIME (ns)
TIME (ns)
2pF LOAD
1.5
50
5
60
6
2.0
LOAD
70
10pF
7
8
8
0
2.5
90
9
100
3
10
.0
Rev. 0 | Page 22 of 84
Figure 23. Internal VCO Phase Noise (Absolute), LVDS Output @ 633 MHz
Figure 22. CMOS Output Swing vs. Frequency and Capacitive Load
–100
–110
–120
–130
–140
–150
–160
1600
1400
1200
1000
–50
–60
–70
–80
–90
800
600
400
200
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
Figure 21. LVDS Differential Voltage Swing vs. Frequency
1k
0
0
Output Terminated 100 Ω Across Differential Pair
100
10k
200
200
FREQUENCY (GHz)
FREQUENCY (MHz)
FREQUENCY (Hz)
100k
400
7mA SETTING
DEFAULT 3.5mA SETTING
300
400
600
1M
500
10M
800
600
2pF
10pF
20pF
100M
1000
7
00