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Ad9912 – Analog Devices AD9912 User Manual

Page 13

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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