AD9520-1 Analog Devices, Inc., AD9520-1 Datasheet - Page 22

• Manufacturer Part Number: AD9520-1
• Description: 12 Lvpecl/24 Cmos Output Clock Generator With Integrated 2.5 Ghz Vco
• Manufacturer: Analog Devices, Inc.

AD9520-1
Figure 12. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/ REFIN
–208
–210
–212
–214
–216
–218
–220
–222
–224
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
0
100
2.3
Figure 14. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
0
LBW = 127 kHz; I
SINGLE-ENDED INPUT
Figure 13. VCO Tuning Voltage vs. Frequency
105
0.2
DIFFERENTIAL INPUT
110
2.4
0.4
INPUT SLEW RATE (V/ns)
115
CP
= 3.0 mA; f
FREQUENCY (GHz)
FREQUENCY (MHz)
0.6
120
2.5
125
VCO
0.8
= 2458 MHz (new)
130
1.0
2.6
135
1.2
140
145
1.4
2.7
Rev. 0 | Page 22 of 84
Figure 15. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–0.4
–0.8
–1.2
122.38
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1.2
0.8
0.4
0
0
Figure 16. CMOS Output V
10k
0
0
LBW = 127 kHz; I
Figure 17. LVPECL Output (Differential) @ 100 MHz
VS_DRV = 3.135V
VS_DRV = 2.35V
2
122.58
4
6
CP
8
FREQUENCY (MHz)
RESISTIVE LOAD (Ω)
122.78
= 3.0 mA; f
10
OH
TIME (ns)
(Static) vs. R
12
1k
VS_DRV = 3.3V
VS_DRV = 2.5V
122.98
VCO
14
= 2458 MHz (new)
16
LOAD
18
123.18
(to Ground)
20
22
123.38
2
4
100