AD9779A-EBZ datasheet(23/56 Pages) AD

23 / 56 page

AD9776A/AD9778A/AD9779A

Rev. B | Page 23 of 56

–90

250

FOUT (MHz)

–55

100

125

150

175

200

225

–60

–65

–70

–75

–80

–85

FIRST ADJACENT CHANNEL

SECOND ADJACENT

CHANNEL

THIRD ADJACENT

CHANNEL

Figure 48. AD9776A ACLR vs. fOUT,

fDATA = 122.88 MSPS, 4× Interpolation, fDAC/4 Modulation

SPAN 50MHz

SWEEP 162.2ms (601 pts)

VBW 300kHz

CENTER 143.88MHz

*RES BW 30kHz

RMS RESULTS

CARRIER POWER

–12.67dBm/

3.84000MHz

FREQ OFFSET

5.000MHz

10.00MHz

15.00MHz

REF BW

3.884MHz

3.840MHz

dBc

–75.00

–78.05

–77.73

dBm

–87.67

–90.73

–90.41

LOWER

dBc

–75.30

–77.99

–77.50

dBm

–87.97

–90.66

–90.17

UPPER

REF –25.29dBm

*AVG

log

10dB

PAVG

W1 S2

*ATTEN 4dB

Figure 49. AD9776A Single Carrier W-CDMA,

4× Interpolation, fDATA = 122.88 MSPS, Amplitude = −3 dBFS

–150

–170

100

fOUT (MHz)

–154

–158

–162

–166

fDAC = 800MSPS

fDAC = 400MSPS

fDAC = 200MSPS

Figure 50. AD9776A Noise Spectral Density vs. fOUT,

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 51. AD9776A Noise Spectral Density vs. fOUT,

Single-Tone Input at −6 dBFS, fDATA = 200 MSPS

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