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AD9122
Rev. B | Page 14 of 60
–
152
–156
–154
–158
–160
–162
–164
–166
0 50 100 150 200 250 300 350 400 450
NSD (dBm/Hz)
f
OUT
(MHz)
2×,
f
DATA
= 200MSPS
1×,
f
DATA
= 200MSPS
4×,
f
DATA
= 200MSPS
8×,
f
DATA
= 100MSPS
08281-119
Figure 22. One-Tone NSD vs. f
OUT
over Interpolation,
Digital Scale = 0 dBFS, I
FS
= 20 mA, PLL Off
–
154
–158
–156
–160
–162
–164
–166
–168
0 50 100 150 200 250 300 350 400 450
NSD (dBm/Hz)
f
OUT
(MHz)
–6dBFS
0dBFS
–12dBFS
–18dBFS
08281-120
Figure 23. One-Tone NSD vs. f
OUT
over Digital Scale, 4× Interpolation,
f
DATA
= 200 MSPS, I
FS
= 20 mA, PLL Off
–
158
–159
–160
–161
–162
–163
–164
–165
–166
0 50 100 150 200 250 300 350 400 450
NSD (dBm/Hz)
f
OUT
(MHz)
2×,
f
DATA
= 200MSPS
4×,
f
DATA
= 200MSPS
8×,
f
DATA
= 100MSPS
08281-121
Figure 24. One-Tone NSD vs. f
OUT
over Interpolation,
Digital Scale = 0 dBFS, I
FS
= 20 mA, PLL On
–
161.0
–165.5
–165.0
–164.5
–164.0
–163.5
–163.0
–162.5
–162.0
–161.5
0 50 100 150 200 250 300 350 400 450
NSD (dBm/Hz)
f
OUT
(MHz)
2×,
f
DATA
= 200MSPS
1×,
f
DATA
= 200MSPS
4×,
f
DATA
= 200MSPS
8×,
f
DATA
= 100MSPS
08281-122
Figure 25. Eight-Tone NSD vs. f
OUT
over Interpolation,
Digital Scale = 0 dBFS, I
FS
= 20 mA, PLL Off
–
161.0
–166.5
–165.5
–166.0
–165.0
–164.5
–164.0
–163.5
–163.0
–162.5
–162.0
–161.5
0 50 100 150 200 250 300 350 400 450
NSD (dBm/Hz)
f
OUT
(MHz)
–6dBFS
0dBFS
–12dBFS
–18dBFS
08281-123
Figure 26. Eight-Tone NSD vs. f
OUT
over Digital Scale, 4× Interpolation,
f
DATA
= 200 MSPS, I
FS
= 20 mA, PLL Off
–
160
–161
–162
–163
–164
–165
–166
0 50 100 150 200 250 300 350 400 450
NSD (dBm/Hz)
f
OUT
(MHz)
2×,
f
DATA
= 200MSPS
4×,
f
DATA
= 200MSPS
8×,
f
DATA
= 100MSPS
08281-124
Figure 27. Eight-Tone NSD vs. f
OUT
over Interpolation,
Digital Scale = 0 dBFS, I
FS
= 20 mA, PLL On