AD9520-0
–208
–210
–212
–214
–216
–218
–220
DIFFERENTIAL INPUT
–222
SINGLE-ENDED INPUT
–224
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
INPUT SLEW RATE (V/ns)
Figure 12. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/REFIN
2.1
1.9
1.7
1.5
1.3
1.1
0.9
2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95
FREQUENCY (GHz)
Figure 13. VCO Tuning Voltage vs. Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100 105 110 115 120 125 130 135 140 145
FREQUENCY (MHz)
Figure 14. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
LBW = 127 kHz; ICP = 3.0 mA; fVCO = 2703.4 MHz
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
122.38
122.58
122.78
122.98
FREQUENCY (MHz)
123.18
123.38
Figure 15. Output Spectrum, LVPECL; 122.88 MHz; PFD = 15.36 MHz;
LBW = 127 kHz; ICP = 3.0 mA; fVCO = 2703.4 MHz
3.5
3.0
VS_DRV = 3.135V
2.5
VS_DRV = 2.35V
2.0
VS_DRV = 3.3V
VS_DRV = 2.5V
1.5
1.0
0.5
0
10k
1k
100
RESISTIVE LOAD (Ω)
Figure 16. CMOS Output VOH (Static) vs. RLOAD (to Ground)
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
0 2 4 6 8 10 12 14 16 18 20 22 24
TIME (ns)
Figure 17. LVPECL Output (Differential) @ 100 MHz
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