AD9865BCPRL datasheet(16/48 Pages) AD

16 / 48 page

AD9865

Rev. A | Page 16 of 48

TxDAC PATH TYPICAL PERFORMANCE CHARACTERISTICS

AVDD = CLKVDD = DVDD = DRVDD = 3.3 V, fOSCIN = 50 MSPS and 80 MSPS, RSET = 1.96 kΩ, 2:1 transformer coupled output

(see Figure 63) into 50 Ω load half- or full-duplex interface, default power bias settings.

FREQUENCY (MHz)

–80

–70

–60

–50

–40

–30

–20

–10

Figure 27. Dual-Tone Spectral Plot of TxDAC's Output

(fDATA = 50 MSPS, 4× Interpolation, 10 dBm Peak Power,

F1 = 17 MHz, F2 = 18 MHz)

2-TONE CENTER FREQUENCY (MHz)

2.5

5.0

7.5

10.0

12.5

15.0

17.5

20.0

–65

–90

–85

–80

–75

–70

10dBm

7dBm

4dBm

Figure 28. 2-Tone IMD Frequency Sweep vs. Peak Power

with fDATA = 50 MSPS, 4× Interpolation

2-TONE CENTER FREQUENCY (MHz)

2.5

5.0

7.5

10.0

12.5

15.0

17.5

20.0

–65

–90

–85

–80

–75

–70

10dBm

7dBm

4dBm

Figure 29. 2-Tone Worst Spur Frequency Sweep vs. Peak Power

with fDATA = 50 MSPS, 4× Interpolation

FREQUENCY (MHz)

–80

–70

–60

–50

–40

–30

–20

–10

Figure 30. Dual-Tone Spectral Plot of TxDAC's Output

(fDATA = 80 MSPS, 2× Interpolation, 10 dBm Peak Power,

F1 = 27.1 MHz, F2 = 28.7 MHz)

2-TONE CENTER FREQUENCY (MHz)

–65

–90

–85

–80

–75

–70

10dBm

7dBm

4dBm

Figure 31. 2-Tone IMD Frequency Sweep vs. Peak Power

with fDATA = 80 MSPS, 2× Interpolation

2-TONE CENTER FREQUENCY (MHz)

–65

–90

–85

–80

–75

–70

10dBm

7dBm

4dBm

Figure 32. 2-Tone Worst Spur Frequency Sweep vs. Peak Power

with fDATA = 80 MSPS, 2× Interpolation

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