Datasheet

30
40
50
60
70
80
90
100
0 50 100 150 200 250 300 350 400
Output Frequency (MHz)
IMD3 (dBc)
I
OUT
FS = 10 mA w/ 4:1 Transformer
I
OUT
FS = 20 mA w/ 4:1 Transformer
I
OUT
FS = 30 mA w/ 2:1 Transformer
G017
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
65 66 67 68 69 70 71 72 73 74 75
Frequency (MHz)
Power (dBm)
NCO Bypassed
QMC Bypassed
f
DAC
= 1250 MSPS
f
OUT
= 70 MHz
Tone Spacing = 1 MHz
G018
30
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Output Frequency (MHz)
IMD3 (dBc)
f
DATA
= 312.5 MSPS, 1x Interpolation
f
DATA
= 312.5 MSPS, 2x Interpolation
f
DATA
= 312.5 MSPS, 4x Interpolation
f
DATA
= 156.25 MSPS, 8x Interpolation
f
DATA
= 78.125 MSPS, 16x Interpolation
G015
30
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Output Frequency (MHz)
IMD3 (dBc)
f
DAC
= 600 MSPS
f
DAC
= 800 MSPS
f
DAC
= 1000 MSPS
f
DAC
= 1250 MSPS
G016
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
10
10 110 210 310 410 510 610
Frequency (MHz)
Power (dBm)
PLL Enabled w/ PFD of 78.125 MHz
f
DAC
= 1250 MSPS
f
OUT
= 200 MHz
G013
30
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Output Frequency (MHz)
IMD3 (dBc)
0 dBFS
−6 dBFS
−12 dBFS
G014
DAC3484
www.ti.com SLAS749C –MARCH 2011–REVISED AUGUST 2012
TYPICAL CHARACTERISTICS (continued)
All plots are at 25°C, nominal supply voltage, f
DAC
= 1250 MSPS, 4x interpolation, NCO enabled, Mixer Gain disabled, QMC
enabled with gain set at 1446 for both I/Q channels, 0 dBFS digital input, 20 mA full-scale output current with 4:1 transformer
(unless otherwise noted)
Figure 13. SINGLE TONE SPECTRAL PLOT Figure 14. IMD3 vs OUTPUT FREQUENCY OVER INPUT
SCALE
Figure 15. IMD3 vs OUTPUT FREQUENCY OVER Figure 16. IMD3 vs OUTPUT FREQUENCY OVER f
DAC
INTERPOLATION
Figure 17. IMD3 vs OUTPUT FREQUENCY OVER I
OUTFS
Figure 18. TWO TONE SPECTRAL PLOT
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