DAC3482_15 Datasheet, PDF (21/106 Pages) Texas Instruments – DAC3482, Dual-Channel, 16-Bit, 1.25 GSPS Digital-to-Analog Converter (DAC)

www.ti.com
DAC3482
SLAS748F – MARCH 2011 – REVISED AUGUST 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)
10
100
0
PLL Enabled w/ PFD of 78.125 MHz
f_DAC = 1250 MSPS
90
−10
f_OUT = 200 MHz
−20
80
0 dBFS
−6 dBFS
−12 dBFS
−30
70
−40
−50
60
−60
50
−70
40
−80
−90
10
110
210
310
410
510
Frequency (MHz)
Figure 13. Single Tone Spectral Plot
610
G013
30
0
100
200
300
400
500
600
Output Frequency (MHz)
G014
Figure 14. IMD3 vs Output Frequency Over Input Scale
100
100
f_DAC = 600 MSPS
90
90
f_DAC = 800 MSPS
f_DAC = 1000 MSPS
80
80
f_DAC = 1250 MSPS
70
70
60
50
40
30
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)
G015
Figure 15. IMD3 vs Output Frequency Over Interpolation
100
90
80
70
60
50
40
30
0
I_OUTFS = 10 mA w/ 4:1 Transformer
I_OUTFS = 20 mA w/ 4:1 Transformer
I_OUTFS = 30 mA w/ 2:1 Transformer
50 100 150 200 250 300 350 400
Output Frequency (MHz)
G017
Figure 17. IMD3 vs Output Frequency Over I_OUTFS
60
50
40
30
0
100
200
300
400
500
Output Frequency (MHz)
600
G016
Figure 16. IMD3 vs Output Frequency Over f_DAC
0
NCO Bypassed
−10
QMC Bypassed
−20
f_DAC = 1250 MSPS
−30
f_OUT = 70 MHz
Tone Spacing = 1 MHz
−40
−50
−60
−70
−80
−90
−100
65 66 67 68 69 70 71 72 73 74 75
Frequency (MHz)
G018
Figure 18. Two Tone Spectral Plot
Copyright © 2011–2015, Texas Instruments Incorporated
Product Folder Links: DAC3482
Submit Documentation Feedback
21