Txdac Path Typical Performance Characteristics - Analog Devices AD9865 Manual

AD9865

TxDAC PATH TYPICAL PERFORMANCE CHARACTERISTICS

AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, f
(see Figure 63) into 50 Ω load half- or full-duplex interface, default power bias settings.
10
0
–10
–20
–30
–40
–50
–60
–70
–80
0 5 10
FREQUENCY (MHz)
Figure 27. Dual-Tone Spectral Plot of TxDAC's Output
(f = 50 MSPS, 4× Interpolation, 10 dBm Peak Power,
DATA
F1 = 17 MHz, F2 = 18 MHz)
–65
–70
–75
–80
–85
–90
0 2.5 5.0 7.5
2-TONE CENTER FREQUENCY (MHz)
Figure 28. 2-Tone IMD Frequency Sweep vs. Peak Power
with f = 50 MSPS, 4× Interpolation
DATA
–65
–70
–75
10dBm
–80
–85
–90
0 2.5 5.0 7.5
2-TONE CENTER FREQUENCY (MHz)
Figure 29. 2-Tone Worst Spur Frequency Sweep vs. Peak Power
with f = 50 MSPS, 4× Interpolation
DATA
= 50 MSPS and 80 MSPS, RSET = 1.96 kΩ, 2:1 transformer coupled output
OSCIN
15 20 30
4dBm
7dBm
10dBm
10.0 12.5 15.0 17.5 20.0
4dBm
7dBm
10.0 12.5 15.0 17.5 20.0
Rev. A | Page 16 of 48
10
0
–10
–20
–30
–40
–50
–60
–70
–80
0 5 10 15 20
FREQUENCY (MHz)
Figure 30. Dual-Tone Spectral Plot of TxDAC's Output
(f = 80 MSPS, 2× Interpolation, 10 dBm Peak Power,
DATA
F1 = 27.1 MHz, F2 = 28.7 MHz)
–65
–70
10dBm
–75
4dBm
–80
–85
–90
0 5 10 15
2-TONE CENTER FREQUENCY (MHz)
Figure 31. 2-Tone IMD Frequency Sweep vs. Peak Power
with f = 80 MSPS, 2× Interpolation
DATA
–65
–70
–75
4dBm
–80
–85
–90
0 5 10 15
2-TONE CENTER FREQUENCY (MHz)
Figure 32. 2-Tone Worst Spur Frequency Sweep vs. Peak Power
with f = 80 MSPS, 2× Interpolation
DATA
25 30 35 40
7dBm
20 25 30
10dBm
7dBm
20 25 30