0
fDATA = 250MSPS
โ10
fDATA = 400MSPS
โ20
โ30
โ40
โ50
โ60
โ70
โ80
โ90
0
50 100 150 200 250 300 350 400 450
fOUT (MHz)
Figure 10. Highest Digital Spur vs. fOUT over fDATA, 2ร Interpolation,
Digital Scale = 0 dBFS, fSC = 20 mA
โ64
fDATA = 100MSPS
fDATA = 200MSPS
โ66
โ68
โ70
โ72
โ74
โ76
โ78
0
50 100 150 200 250 300 350 400 450
fOUT (MHz)
Figure 11. Highest Digital Spur vs. fOUT over fDATA, 4ร Interpolation,
Digital Scale = 0 dBFS, fSC = 20 mA
โ64
fDATA = 100MSPS
fDATA = 150MSPS
โ66
โ68
โ70
โ72
โ74
โ76
0
100
200
300
400
500
600
700
fOUT (MHz)
Figure 12. Highest Digital Spur vs. fOUT over fDATA, 8ร Interpolation,
Digital Scale = 0 dBFS, fSC = 20 mA
AD9122
2ร INTERPOLATION,
SINGLE-TONE SPECTRUM,
fDATA = 250MSPS,
fOUT = 101MHz
START 1.0MHz
#RES BW 10kHz
VBW 10kHz
STOP 500.0MHz
SWEEP 6.017s (601 PTS)
Figure 13. 2ร Interpolation, Single-Tone Spectrum
4ร INTERPOLATION,
SINGLE-TONE SPECTRUM,
fDATA = 200MSPS,
fOUT = 151MHz
START 1.0MHz
#RES BW 10kHz
VBW 10kHz
STOP 800.0MHz
SWEEP 9.634s (601 PTS)
Figure 14. 4ร Interpolation, Single-Tone Spectrum
8ร INTERPOLATION,
SINGLE-TONE SPECTRUM,
fDATA = 100MSPS,
fOUT = 131MHz
START 1.0MHz
#RES BW 10kHz
VBW 10kHz
STOP 800.0MHz
SWEEP 9.634s (601 PTS)
Figure 15. 8ร Interpolation, Single-Tone Spectrum
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