Datasheet

130
135
140
145
150
155
160
165
170
0 100 200 300 400 500
Output Frequency (MHz)
NSD (dBc/Hz)
I
out
FS = 10 mA, 4:1 transformer
I
out
FS = 20 mA, 4:1 transformer
I
out
FS = 30 mA, 2:1 transformer
G023
130
135
140
145
150
155
160
165
170
0 100 200 300 400 500 600
Output Frequency (MHz)
NSD (dBc/Hz)
PLL Bypassed
PLL Enabled w/ PFD of 78.125 MHz
G024
130
135
140
145
150
155
160
165
170
0 100 200 300 400 500 600
Output Frequency (MHz)
NSD (dBc/Hz)
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
G021
130
135
140
145
150
155
160
165
170
0 100 200 300 400 500
Output Frequency (MHz)
NSD (dBc/Hz)
f
DAC
= 600 MSPS
f
DAC
= 800 MSPS
f
DAC
= 1000 MSPS
f
DAC
= 1250 MSPS
G022
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
195 196 197 198 199 200 201 202 203 204 205
Frequency (MHz)
Power (dBm)
f
DAC
= 1250 MSPS
f
OUT
= 200 MHz
Tone Spacing = 1 MHz
G019
130
135
140
145
150
155
160
165
170
0 100 200 300 400 500 600
Output Frequency (dB)
NSD (dBc/Hz)
0dBFS
−6dBFS
−12dBFS
G020
DAC3484
SLAS749C –MARCH 2011–REVISED AUGUST 2012 www.ti.com
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 19. TWO TONE SPECTRAL PLOT Figure 20. NSD vs OUTPUT FREQUENCY OVER INPUT
SCALE
Figure 21. NSD vs OUTPUT FREQUENCY OVER Figure 22. NSD vs OUTPUT FREQUENCY OVER f
DAC
INTERPOLATION
Figure 23. NSD vs OUTPUT FREQUENCY OVER I
OUTFS
Figure 24. NSD vs OUTPUT FREQUENCY OVER CLOCKING
OPTIONS
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