DAC34H84_1109 Datasheet, PDF (18/80 Pages) Texas Instruments – Quad-Channel, 16-Bit, 1.25 GSPS Digital-to-Analog Converter (DAC)

DAC34H84
SLAS751B – MARCH 2011 – REVISED SEPTEMBER 2011
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TYPICAL CHARACTERISTICS (continued)
All plots are at 25°C, nominal supply voltage, f_DAC = 1250 MSPS, 2x 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)
85
PLL Disabled
PLL Enabled
80
75
70
65
60
55
0
100
200
300
400
500
600
Output Frequency (MHz)
Figure 25. Single Carrier WCDMA ACLR (Adjacent) vs
Output Frequency Over Clocking Options
85
PLL Disabled
PLL Enabled
80
75
70
65
60
55
0
100
200
300
400
500
600
Output Frequency (MHz)
Figure 26. Single Carrier WCDMA ACLR (Alternate) vs
Output Frequency Over Clocking Options
2x Interpolation, 0 dBFS
f_DAC = 1228.8 MSPS
f_OUT = 70 MHz
2x Interpolation, 0 dBFS
f_DAC = 1228.8 MSPS
f_OUT = 120 MHz
Figure 27. Single Carrier W-CDMA Test Model 1
2x Interpolation, 0 dBFS
f_DAC = 1228.8 MSPS
f_OUT = 200 MHz
Figure 28. Single Carrier W-CDMA Test Model 1
2x Interpolation, 0 dBFS
f_DAC = 1228.8 MSPS
f_OUT = 70 MHz
Figure 29. Single Carrier W-CDMA Test Model 1
Figure 30. Four Carrier W-CDMA Test Model 1
18
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