Datasheet

Data Sheet AD9557
Rev. B | Page 21 of 92
–160
–150
–140
–130
–120
–1
10
–100
–90
–80
–70
1k10
100
10k
100k
1M 10M 100M
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
INTEGRA
TED RMS JITTER (12kHz TO 20MHz): 391fs
09197-013
Figure 13. Absolute Phase Noise (Output Driver = 3.3 V CMOS),
f
R
= 19.44 MHz, f
O
=161.1328125 MHz,
DPLL Loop BW = 0.1 Hz, f
SYS
= 19.2 MHz TCXO
–160
–150
–140
–130
–120
–1
10
–100
–90
–80
–70
1k10 100
10k
100k
1M
10M 100M
PHASE NOISE (dBc/Hz)
FREQUENCY
OFFSET (Hz)
INTEGR
ATED RMS JITTER (12kHz
T
O 20MHz): 395fs
09197-014
Figure 14. Absolute Phase Noise (Output Driver = 1.8 V CMOS),
f
R
= 2 kHz, f
O
= 70.656 MHz,
DPLL Loop BW = 0.1 Hz, f
SYS
= 19.2 MHz TCXO
1k10 100
10k
100k
1M
10M
100M
–160
–150
–140
–130
–120
–110
–100
–90
–80
–70
–60
PHASE NOISE (dBc/Hz)
FREQUENCY OFFSET (Hz)
INTEGRATED RMS JITTER (12kHz TO 20MHz): 388fs
09197-016
Figure 15. Absolute Phase Noise (Output Driver = HSTL),
f
R
= 19.44 MHz, f
O
= 644.53 MHz, f
SYS
= 19.2 MHz TCXO, Holdover Mode
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
DIFFERENTIAL PEAK-TO-PEAK AMPLITUDE (V)
0
100
200
300
400
500 600
700
800
900
1000
1100
1200
1300
FREQUENCY (MHz)
09197-116
Figure 16. Amplitude vs. Toggle Rate,
HSTL Mode (LVPECL-Compatible Mode)
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 100 200 300 400 500 600 700 800
DIFFERENTIAL PEAK-TO-PEAK AMPLITUDE (V)
FREQUENCY (MHz)
LVDS BOOST MODE
LVDS DEFAULT
09197-117
Figure 17. Amplitude vs. Toggle Rate, LVDS
1.0
1.5
2.0
2.5
3.0
3.5
0
50 100
150
200
250 300
PEAK-TO-PEAK AMPLITUDE (V)
FREQUENC
Y (MHz)
3.3V
C
MOS
1.8V C
MOS
09197-118
Figure 18. Amplitude vs. Toggle Rate with 10 pF Load,
3.3 V (Strong Mode) and 1.8 V CMOS