DAC3484_15 Datasheet, PDF (21/107 Pages) Texas Instruments – DAC3484 Quad-Channel, 16-Bit, 1.25 GSPS Digital-to-Analog Converter (DAC)

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DAC3484
SLAS749E – MARCH 2011 – REVISED NOVEMBER 2015
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)
0
170
−10
f_DAC = 1250 MSPS
f_OUT = 200 MHz
165
−20
Tone Spacing = 1 MHz
160
−30
0dBFS
−6dBFS
−12dBFS
−40
155
−50
150
−60
145
−70
140
−80
−90
135
−100
195 196 197 198 199 200 201 202 203 204 205
Frequency (MHz)
G019
Figure 19. Two Tone Spectral Plot
130
0
100
200
300
400
500
600
Output Frequency (dB)
G020
Figure 20. NSD vs Output Frequency Over Input Scale
170
170
f_DAC = 600 MSPS
165
165
f_DAC = 800 MSPS
f_DAC = 1000 MSPS
160
160
f_DAC = 1250 MSPS
155
155
150
150
145
140
135
130
0
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
100
200
300
400
500
600
Output Frequency (MHz)
G021
Figure 21. NSD vs Output Frequency Over Interpolation
170
I_out FS = 10 mA, 4:1 transformer
165
I_out FS = 20 mA, 4:1 transformer
I_out FS = 30 mA, 2:1 transformer
160
145
140
135
130
0
100
200
300
400
500
Output Frequency (MHz)
G022
Figure 22. NSD vs Output Frequency Over f_DAC
170
PLL Bypassed
165
PLL Enabled w/ PFD of 78.125 MHz
160
155
155
150
150
145
145
140
140
135
135
130
0
100
200
300
400
500
Output Frequency (MHz)
G023
Figure 23. NSD vs Output Frequency Over I_OUTFS
130
0
100
200
300
400
500
600
Output Frequency (MHz)
G024
Figure 24. NSD vs Output Frequency Over Clocking Options
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