Datasheet

AD9776A/AD9778A/AD9779A
Rev. B | Page 19 of 56
100
50
55
60
65
70
75
80
85
90
95
0 400
f
OUT
(MHz)
IMD (dBc)
80 160 240 36032040 120 200 280
0dBFS
–3dBFS
–6dBFS
06452-117
Figure 24. AD9779A IMD Performance vs. f
OUT
,
Digital Full-Scale Input Over Output Frequency,
4× Interpolation, f
DATA
= 200 MSPS
100
50
55
60
65
70
75
80
85
90
95
0 400
f
OUT
(MHz)
IMD (dBc)
80 160 240 36032040 120 200 280
20mA
10mA
30mA
06452-118
Figure 25. AD9779A IMD Performance vs. f
OUT
,
Full-Scale Output Current Over Output Frequency,
4× Interpolation, f
DATA
= 200 MSPS
STOP 400.0MHz
SWEEP 1.203s (601 pts)
VBW 20kHz
START 1.0MHz
*RES BW 20kHz
REF 0dBm
*PEAK
log
10dB
LGAV
51
W1
S3
£(f):
FTUN
SWP
S2
FC
AA
*ATTEN 20dB
EXT REF
DC-COUPLED
06452-023
Figure 26. AD9779A Single Tone,
4× Interpolation, f
DATA
= 100 MSPS, f
OUT
= 30 MHz
STOP 400.0MHz
SWEEP 1.203s (601 pts)
VBW 20kHz
START 1.0MHz
*RES BW 20kHz
REF 0dBm
*PEAK
Log
10dB
LGAV
51
W1
S3
£(f):
FTUN
SWP
S2
FC
AA
*ATTEN 20dB
EXT REF
DC-COUPLED
06452-024
Figure 27. AD9779A Two-Tone Spectrum,
4× Interpolation, f
DATA
= 100 MSPS, f
OUT
= 30 MHz, 35 MHz
–142
–146
–150
–154
–158
–162
–166
–170
0
f
OUT
(MHz)
NSD (dBm/Hz)
20 40 60 80
0dBFS
–3dBFS
–6dBFS
06452-025
Figure 28. AD9779A Noise Spectral Density vs. f
OUT
,
Digital Full-Scale Over Output Frequency of Single-Tone Input,
2× Interpolation, f
DATA
= 200 MSPS
–
150
–170
0
100
f
OUT
(MHz)
NSD (dBm/Hz)
–154
–158
–162
–166
20 40 60 80
f
DAC
= 800MSPS
f
DAC
= 400MSPS
f
DAC
= 200MSPS
06452-026
Figure 29. AD9779A Noise Spectral Density vs. f
OUT
,
f
DAC
Over Output Frequency for Eight-Tone Input with 500 kHz Spacing,
f
DATA
= 200 MSPS