AD9683 datasheet(16/45 Pages) AD

16 / 45 page

Data Sheet

AD9683

Rev. D | Page 15 of 44

100

100 110 120 130 140 150 160 170

SAMPLE RATE (MSPS)

SFDR (dBc)

SNR (dBFS)

Figure 17. AD9683-170 Single-Tone SNR/SFDR vs. Sample Rate (fS)

with fIN = 90.1 MHz

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

1.375 LSB rms

638

7601

41248

138113

384443

278480

100153

24088

2363

182

521038

598772

Figure 18. AD9683-170 Grounded Input Histogram

–140

–120

–100

–80

–60

–40

–20

100

125

FREQUENCY (MHz)

250MSPS

90.1MHz AT –1dBFS

SNR = 71dB (72dBFS)

SFDR = 89dBc

THIRD HARMONIC

SECOND HARMONIC

Figure 19. AD9683-250 Single-Tone FFT with fIN = 90.1 MHz

–140

–120

–100

–80

–60

–40

–20

100

125

FREQUENCY (MHz)

THIRD HARMONIC

250MSPS

90.1MHz AT –1dBFS

SNR = 71dB (72dBFS)

SFDR = 89dBc

SECOND HARMONIC

Figure 20. AD9683-250 Single-Tone FFT with fIN = 90.1 MHz, RFCLK = 1.0 GHz

with Divide by 4 (Address 0x09 = 0x21)

–140

–120

–100

–80

–60

–40

–20

100

125

FREQUENCY (MHz)

THIRD HARMONIC

250MSPS

185.1MHz AT –1dBFS

SNR = 69.5dB (70.5dBFS)

SFDR = 88dBc

SECOND HARMONIC

Figure 21. AD9683-250 Single-Tone FFT with fIN = 185.1 MHz

–140

–120

–100

–80

–60

–40

–20

100

125

FREQUENCY (MHz)

THIRD HARMONIC

250MSPS

185.1MHz AT –1dBFS

SNR = 70dB (71dBFS)

SFDR = 85dBc

SECOND HARMONIC

Figure 22. AD9683-250 Single-Tone FFT with fIN = 185.1 MHz,

RFCLK = 1.0 GHz with Divide by 4 (Address 0x09 = 0x21)

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