Analog Devices AD9779 Preliminary Technical Data page 11

Preliminary Technical Data
-90
-85
-80
-75
-70
F =61.44MSPS
-65
D ATA
-60
-55
-50
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
st
Figure 18. ACLR for 1 Adjacent Band WCDMA, 4x Interpolation. On-Chip
Modulation is used to translate baseband signal to IF.
-90
-85
-80
-75
-70
F =61.44MSPS
D ATA
-65
-60
-55
-50
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
Figure 19. ACLR for 2nd Adjacent Band WCDMA, 4x Interpolation. On-Chip
Modulation is used to translate baseband signal to IF.
-90
-85
-80
-75
-70
-65
F =61.44MSPS
D ATA
-60
-55
-50
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
Figure 20. ACLR for 3rd Adjacent Band WCDMA, 4x Interpolation. On-Chip
Modulation is used to translate baseband signal to IF.
F =122.88MSPS
D ATA
Fout - M Hz
F =122.88MSPS
D ATA
Fout - MHz
F =122.88MSPS
D ATA
Fout - M Hz
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 25
Figure 21. Power Dissipation, Single DAC Mode
1.1
1
0.9
0.8
0.7
8x Interpolation,
0.6
0.5
0.4
0.3
0.2
0.1
0
0 25
Figure 22. Power Dissipation, Dual DAC Mode
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
0
Figure 23. Power Dissipation of Inverse Sinc Filter
Rev. PrD | Page 11 of 34
8x Interpolation
4x Interpolation,
8x Interpolation,
Zero Stuffing
Zero Stuffing
50 75 100 125 150
F (MSPS)
DAT A
8x Interpolation,F
DA C
8x Interpolation,F
DA C
8x Interpolation,F
DA C
8x Interpolation,Modulation off
4x Interpolation,
Zero Stuffing
Zero Stuffing
50 75 100 125 150
F (M SPS)
DATA
200 400 600 800
F - M SPS
DAC
AD9779
4x Interpolation
2x Interpolation,
Zero Stuffing
2x Interpolation
1x Interpolation,
Zero Stuffing
1x Interpolation
175 200 225 250
/4 Modulation
/2 Modulation
/8 Modulation 4x Interpolation,F /4 Modulation
DA C
4x Interpolation,F /2 Modulation
DA C
4x Interpolation,Modulation off
2x Interpolation,
Zero Stuffing
2x Interpolation,F /2 Modulation
DA C
2x Interpolation,Modulation off
1x Interpolation,
Zero Stuffing
1x Interpolation
175 200 225 250
1000 1200