AD9776-EB datasheet(21/56 Pages) AD

21 / 56 page

AD9776/AD9778/AD9779

Rev. A | Page 21 of 56

100

400

fOUT (MHz)

120

160

200

240

280

320

360

× 200MSPS

× 150MSPS

× 100MSPS

Figure 38. AD9778 IMD, 4× Interpolation

100

fOUT (MHz)

fDATA = 250MSPS

fDATA = 200MSPS

fDATA = 160MSPS

Figure 39. AD9778 In-Band SFDR, 2× Interpolation

–90

250

fOUT (MHz)

–70

–80

–60

100

125

150

175

200

225

1ST ADJ CHAN

2ND ADJ CHAN

3RD ADJ CHAN

Figure 40. AD9778 ACLR, Single-Carrier WCDMA, 4× Interpolation,

fDATA = 122.88 MSPS, Amplitude = −3 dBFS

SPAN 50MHz

SWEEP 162.2ms (601 pts)

VBW 300kHz

CENTER 143.88MHz

*RES BW 30kHz

RMS RESULTS

CARRIER POWER

–12.74dBm/

3.84000MHz

FREQ OFFSET

5.000MHz

10.00MHz

15.00MHz

REF BW

3.884MHz

3.840MHz

dBc

–76.49

–80.13

–80.90

dBm

–89.23

–92.87

–93.64

LOWER

dBc

–76.89

–80.02

–79.53

dBm

–89.63

–92.76

–92.27

UPPER

REF –25.39dBm

*AVG

Log

10dB/

PAVG

W1 S2

*ATTEN 4dB

Figure 41. AD9778 ACLR, fDATA = 122.88 MSPS, 4× Interpolation,

fDAC/4 Modulation

–150

–170

100

fOUT (MHz)

–154

–158

–162

–166

fDAC = 800MSPS

fDAC = 400MSPS

fDAC = 200MSPS

Figure 42. AD9778 Noise Spectral Density vs. fDAC Eight-Tone Input

with 500 kHz Spacing, fDATA = 200 MSPS

–150

–170

100

fOUT (MHz)

–154

–158

–162

–166

fDAC = 800MSPS

fDAC = 400MSPS

fDAC = 200MSPS

Figure 43. AD9778 Noise Spectral Density vs. fDAC Single-Tone Input

at −6 dBFS, fDATA = 200 MSPS

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