AD9683 datasheet(17/44 Pages) AD

17 / 44 page

Data Sheet

AD9683

Rev. 0 | Page 17 of 44

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–120

–100

–80

–60

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100

125

FREQUENCY (MHz)

250MSPS

89.12MHz AT –7dBFS

92.12MHz AT –7dBFS

SFDR = 90dBc (97dBFS)

Figure 29. AD9683-250 Two-Tone FFT with fIN1 = 89.12 MHz, fIN2 = 92.12 MHz,

fS = 250 MSPS

–140

–120

–100

–80

–60

–40

–20

100

125

FREQUENCY (MHz)

250MSPS

184.12MHz AT –7dBFS

187.12MHz AT –7dBFS

SFDR = 87dBc (94dBFS)

Figure 30. AD9683-250 Two-Tone FFT with

fIN1 = 184.12 MHz, fIN2 = 187.12 MHz, fS = 250 MSPS

100

120

140

160

180

200

220

240

SAMPLE RATE (MSPS)

SFDR (dBc)

SNR (dBFS)

Figure 31. AD9683-250 Single-Tone SNR/SFDR vs. Sample Rate (fS)

with fIN = 90.1 MHz

161

2316

15633

70369

59901

7965

658

100000

200000

300000

400000

500000

600000

700000

N – 7

N – 5

N – 3

N – 1

N + 1

N + 3

N + 5

OUTPUT CODE

2,097,152 TOTAL HITS

1.419 LSB rms

261252

181231

520772

581334

395507

Figure 32. AD9683-250 Grounded Input Histogram

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