Datasheet

AD9522-3
Rev. 0 | Page 21 of 84
–
208
–210
–212
–214
–216
–218
–220
–222
–224
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
07224-114
Figure 12. PLL Figure of Merit (FOM) vs. Slew Rate at REFIN/
REFIN
1.9
1.7
1.5
1.3
1.1
0.9
1.71.81.92.02.12.22.3
VCO TUNING VOLTAGE (V)
FREQUENCY (GHz)
07224-115
Figure 13. VCO Tuning Voltage vs. Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–110
–100
POWER (dBm)
100 145140135130125120115110105
FREQUENCY (MHz)
07224-116
Figure 14. PFD/CP Spurs; 122.88 MHz; PFD = 15.36 MHz;
LBW = 127 kHz; I
CP
= 3.0 mA; f
VCO
= 1720 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)
07224-117
Figure 15. Output Spectrum, LVDS; 122.88 MHz; PFD = 15.36 MHz;
LBW = 127 kHz; I
CP
= 3.0 mA; f
VCO
= 1720 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)
VS_DRV = 3.135V
VS_DRV = 2.35V
VS_DRV = 3.3V
VS_DRV = 2.5V
07224-118
Figure 16. CMOS Output V
OH
(Static) vs. R
LOAD
(to Ground)
0.4
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
011413121110987654321
DIFFERENTIAL OUTPUT (V)
TIME (ns)
5
07224-014
Figure 17. LVDS Output (Differential) @ 100 MHz
Output Terminated 100 Ω Across Differential Pair