Analog Devices AD9912 Manual page 13

–115
–125
–135
–145
–155
–165
–175
100 1k 10k
FREQUENCY OFFSET (Hz)
Figure 21. Absolute Phase Noise of Unfiltered DAC Output,
f
= 50 MHz, 200 MHz, and 400 MHz, SYSCLK Driven by
OUT
a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
–115
RMS JITTER (100Hz TO 20MHz): 69fs
–125
–135
–145
–155
–165
–175
100 1k 10k
FREQUENCY OFFSET (Hz)
Figure 22. Absolute Phase Noise of Unfiltered DAC Output, f
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
–115
RMS JITTER (100Hz TO 40MHz): 61fs
–125
–135
–145
–155
–165
–175
100 1k 10k
FREQUENCY OFFSET (Hz)
Figure 23. Absolute Phase Noise of Unfiltered DAC Output, f
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
RMS JITTER (100Hz TO 20MHz):
50MHz: 62fs
200MHz: 37fs
400MHz: 31fs
400MHz
200MHz
50MHz
100k 1M 10M 100M
100k 1M 10M 100M
= 63 MHz,
OUT
100k 1M 10M 100M
= 171 MHz,
OUT
–115
–125
–135
–145
–155
–165
–175
100
Figure 24. Absolute Phase Noise of Unfiltered DAC Output, f
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
–115
–125
–135
–145
–155
–165
–175
100
Figure 25. Absolute Phase Noise of Unfiltered DAC Output, f
SYSCLK Driven by a 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)
–110
–120
–130
–140
–150
–160
–170
100
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
Rev. D | Page 13 of 40
RMS JITTER (100Hz TO 100MHz): 83fs
1k 10k 100k 1M
FREQUENCY OFFSET (Hz)
RMS JITTER (100Hz TO 100MHz): 82fs
1k 10k 100k 1M
FREQUENCY OFFSET (Hz)
RMS JITTER (100Hz TO 100MHz): 22fs
1k 10k 100k 1M
FREQUENCY OFFSET (Hz)
AD9912
10M 100M
= 258.3 MHz,
OUT
10M 100M
= 311.6 MHz,
OUT
10M 100M