Analog Devices AD9912, Руководство пользователя

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AD9912
Rev. D | Page 13 of 40
06763-
051
100 1k 10k 100k 1M 10M 100M
FREQUENCY OFFSET (Hz)
–125
–115
–135
–145
–155
–165
–175
PH
A
SE N
O
ISE (d
B
c
/H
z)
RMS JITTER (100Hz TO 20MHz):
50MHz:
200MHz:
400MHz:
62fs
37fs
31fs
200MHz
400MHz
50MHz
Figure 21. Absolute Phase Noise of Unfiltered DAC Output,
f
OUT
= 50 MHz, 200 MHz, and 400 MHz, SYSCLK Driven by
a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
06763-
052
100 1k 10k 100k 1M 10M 100M
FREQUENCY OFFSET (Hz)
–125
–115
–135
–145
–155
–165
–175
PH
A
SE N
O
ISE (d
B
c
/H
z)
RMS JITTER (100Hz TO 20MHz): 69fs
Figure 22. Absolute Phase Noise of Unfiltered DAC Output, f
OUT
= 63 MHz,
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
06763-
053
100 1k 10k 100k 1M 10M 100M
FREQUENCY OFFSET (Hz)
–125
–115
–135
–145
–155
–165
–175
PH
A
SE N
O
ISE (d
B
c
/H
z)
RMS JITTER (100Hz TO 40MHz): 61fs
Figure 23. Absolute Phase Noise of Unfiltered DAC Output, f
OUT
= 171 MHz,
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
06763-
054
100 1k 10k 100k 1M 10M 100M
FREQUENCY OFFSET (Hz)
–125
–115
–135
–145
–155
–165
–175
PH
A
SE N
O
ISE (d
B
c
/H
z)
RMS JITTER (100Hz TO 100MHz): 83fs
Figure 24. Absolute Phase Noise of Unfiltered DAC Output, f
OUT
= 258.3 MHz,
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
06763-
055
100 1k 10k 100k 1M 10M 100M
FREQUENCY OFFSET (Hz)
–125
–115
–135
–145
–155
–165
–175
PH
A
SE N
O
ISE (d
B
c
/H
z)
RMS JITTER (100Hz TO 100MHz): 82fs
Figure 25. Absolute Phase Noise of Unfiltered DAC Output, f
OUT
= 311.6 MHz,
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
06763-
056
100 1k 10k 100k 1M 10M 100M
FREQUENCY OFFSET (Hz)
–120
–110
–130
–140
–150
–160
–170
PH
A
SE N
O
ISE (d
B
c
/H
z)
RMS JITTER (100Hz TO 100MHz): 22fs
Figure 26. Absolute Phase Noise of 1 GHz Reference Used for Performance
Plots; Wenzel Components Used: 100 MHz Oscillator, LNBA-13-24 Amp,
LNOM 100-5 Multiplier, LNDD 500-14 Diode Doubler