Datasheet

AD9520-0 Data Sheet
Rev. A | Page 22 of 80
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0 0.4 0.8 1.20.2 0.6 1.0 1.4
PLL FIGURE OF MERIT (dBc/Hz)
INPUT SLEW RATE (V/ns)
DIFFERENTIAL INPUT
SINGLE-ENDED INPUT
07213-114
Figure 12. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/
REFIN
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
POWER (dBm)
100 145140135130125120115110105
FREQUENCY (MHz)
07213-116
Figure 13. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
LBW = 127 kHz; I
CP
= 3.0 mA; f
VCO
= 2703.4 MHz
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
POWER (dBm)
122.38 122.58 122.78 122.98 123.18 123.38
FREQUENCY (MHz)
07213-117
Figure 14. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;
LBW = 127 kHz; I
CP
= 3.0 mA; f
VCO
= 2703.4 MHz
3.5
0
0.5
1.0
1.5
2.0
2.5
3.0
V
OH
(V)
10k 1k 100
RESISTIVE LOAD (Ω)
V
S_DRV
= 3.135V
V
S_DRV
= 2.35V
V
S_DRV
= 3.3V
V
S_DRV
= 2.5V
07213-118
Figure 15. CMOS Output V
OH
(Static) vs. R
LOAD
(to Ground)
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
0 24222018161412108642
DIFFERENTIAL OUTPUT (V)
TIME (ns)
07213-014
Figure 16. LVPECL Output (Differential) at 100 MHz
1.0
0.6
0.2
–0.2
–0.6
–1.0
0 1.50.5 1.0
DIFFERENTIAL SWING (V p-p)
TIME (ns)
07213-015
Figure 17. LVPECL Differential Voltage Swing at 1600 MHz