AD9776 datasheet(19/56 Pages) AD

19 / 56 page

AD9776/AD9778/AD9779

Rev. A | Page 19 of 56

–150

–170

100

fOUT (MHz)

–154

–158

–162

–166

fDAC = 800MSPS

fDAC = 400MSPS

fDAC = 200MSPS

Figure 30. AD9779 Noise Spectral Density vs. fDAC,

Single-Tone Input at −6 dBFS

–55

–90

260

fOUT (MHz)

–60

–65

–70

–75

–80

–85

80 100 120 140 160 180 200 220 240

–6dBFS

–3dBFS

0dBFS – PLL ON

0dBFS

Figure 31. AD9779 ACLR for First Adjacent Band WCDMA, 4× Interpolation,

fDATA = 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF

–55

–90

260

fOUT (MHz)

–60

–65

–70

–75

–80

–85

80 100 120 140 160 180 200 220 240

–6dBFS

–3dBFS

0dBFS – PLL ON

0dBFS

Figure 32. AD9779 ACLR for Second Adjacent Band WCDMA, 4×

Interpolation, fDATA = 122.88 MSPS. On-Chip Modulation Translates

Baseband Signal to IF

–55

–90

260

fOUT (MHz)

–60

–65

–70

–75

–80

–85

80 100 120 140 160 180 200 220 240

–6dBFS

–3dBFS

0dBFS – PLL ON

0dBFS

Figure 33. AD9779 ACLR for Third Adjacent Band WCDMA, 4× Interpolation,

fDATA = 122.88 MSPS, On-Chip Modulation Translates Baseband Signal to IF

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