Datasheet

Data Sheet AD9520-0
Rev. A | Page 25 of 80
–100
–160
–150
–140
–130
–120
–110
1k 100M1M 10M100k10k
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
07213-033
NOTES
1. THE LOOP FILTER USED TO GENERATE THIS PLOT IS SHOWN IN FIGURE 41.
Figure 30. Phase Noise (Absolute) Clock Generation; Internal VCO at
2.703 GHz; PFD = 15.36 MHz; LBW = 63 kHz; LVPECL Output = 122.88 MHz
1k 100M1M 10M100k10k
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
–120
–160
–150
–140
–130
07213-135
Figure 31. Phase Noise (Absolute), External VCXO (Toyocom TCO-2112)
at 245.76 MHz; PFD = 15.36 MHz; LBW = 250 Hz; LVPECL Output = 245.76 MHz
–80
–90
–100
–110
–120
–130
–140
–150
–160
1k 100M1M 10M100k10k
PHASE NOISE (dBc/Hz)
FREQUENCY (Hz)
INTEGRATED RMS JITTER (12kHz TO 20MHz): 652 fs
07213-034
NOTES
1. THE LOOP FILTER USED TO GENERATE THIS PLOT IS SHOWN IN FIGURE 42.
Figure 32. Phase Noise (Absolute) Clock Cleanup; Internal VCO at 2.799 GHz;
PFD = 120 kHz; LBW = 2.1 kHz; LVPECL Output = 155.52 MHz
1000
100
10
1
0.1
0.01 0.1 1 10 100 1000
JITTER FREQUENCY (kHz)
OC-48 OBJECTIVE MASK
AD9520
f
OBJ
07213-134
NOTE: 375UI MAX AT 10Hz OFFSET IS THE
MAXIMUM JITTER THAT CAN BE
GENERATED BY THE TEST EQUIPMENT.
FAILURE POINT IS GREATER THAN 375UI.
INPUT JITTER AMPLITUDE (UI p-p)
Figure 33. Telcordia GR-253 Jitter Tolerance Plot