DAC38J82_15 Datasheet, PDF (16/119 Pages) Texas Instruments – DAC3xJ82 Dual-Channel, 16-Bit, 1.6/2.5 GSPS, Digital-to-Analog Converters with 12.5 Gbps JESD204B Interface

DAC37J82, DAC38J82
SLASE16B – JANUARY 2014 – REVISED MAY 2014
www.ti.com
Typical Characteristics (continued)
Unless otherwise noted, all plots are at T_A = 25°C, nominal supply voltages, f_DAC = 2460MSPS, 2x interpolation, 0dBFS digital
input, 20mA full scale output current with 2:1 transformer, LMF = 421 and PLL is disabled.
100
100
0dBFS
90
-6dBFS
90
-12dBFS
80
80
70
70
60
60
50
40
30
0 50 100 150 200 250 300 350 400 450 500
Output Frequency (MHz)
D001
50
f_data = 1230MSPS, 2x interpolation
40
f_data = 625MSPS, 4x interpolation
f_data = 312.5MSPS, 8x interpolation
f_data = 156.25MSPS, 16x interpolation
30
0 50 100 150 200 250 300 350 400 450 500
Output Frequency (MHz)
D001
Figure 13. IMD3 vs Output Frequency Over Input Scale
100
f_DAC = 2460MSPS
90
f_DAC = 2000MSPS
f_DAC = 1600MSPS
f_DAC = 1250MSPS
80
70
60
50
40
30
0 50 100 150 200 250 300 350 400 450 500
Output Frequency (MHz)
D001
Figure 14. IMD3 vs Output Frequency Over Interpolation
100
I_outFS = 30mA, w/ 2:1 transformer
90
I_outFS = 20mA, w/ 2:1 transformer
I_outFS = 10mA, w/ 2:1 transformer
80
70
60
50
40
30
0 50 100 150 200 250 300 350 400 450 500
Output Frequency (MHz)
D001
Figure 15. IMD3 vs Output Frequency Over f_DAC
100
PLL off
90
PLL on
80
70
60
50
40
30
0 50 100 150 200 250 300 350 400 450 500
Output Frequency (MHz)
D001
f_ref = f_DAC/4, M = 32, N = 8, Prescaler = 2 for PLL On
Figure 17. IMD3 vs Output Frequency Over Clocking
Options
Figure 16. IMD3 vs Output Frequency Over Output Current
I_outFS
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
67.5
68.5
69.5
70.5
71.5
72.5
Frequency (MHz)
D001
IF = 70MHz, Tone Spacing = 1MHz
Figure 18. Two-tone Spectral Plot
16
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