AD9268 datasheet(21/45 Pages) AD

21 / 45 page

AD9268

Rev. A | Page 20 of 44

120

110

100

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

INPUT AMPLITUDE (dBFS)

SNRFS (DITHER ON)

SNRFS (DITHER OFF)

SFDRFS (DITHER ON)

SFDRFS (DITHER OFF)

Figure 26. AD9268-105 Single-Tone SNR/SFDR vs. Input Amplitude (AIN)

with fIN = 30 MHz with and without Dither Enabled

100

150

200

250

300

INPUT FREQUENCY (MHz)

SNR @ –40°C

SFDR @ –40°C

SNR @ +25°C

SFDR @ +25°C

SNR @ +85°C

SFDR @ +85°C

Figure 27. AD9268-105 Single-Tone SNR/SFDR vs. Input Frequency (fIN)

with 2 V p-p Full Scale

105

100

25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105

SAMPLE RATE (MSPS)

SNR, CHANNEL B

SFDR, CHANNEL B

SNR, CHANNEL A

SFDR, CHANNEL A

Figure 28. AD9268-105 Single-Tone SNR/SFDR vs. Sample Rate (fS)

with fIN = 70.1 MHz

250,000

2.23 LSB rms

200,000

150,000

100,000

50,000

OUTPUT CODE

Figure 29. AD9268-105 Grounded Input Histogram

–2

–4

–6

10,000

20,000

30,000

40,000

50,000

60,000

OUTPUT CODE

DITHER ENABLED

DITHER DISABLED

Figure 30. AD9268-105 INL with fIN = 9.7 MHz

1.00

0.75

0.50

0.25

–0.25

–0.50

–0.75

–1.00

OUTPUT CODE

10,000

20,000

30,000

40,000

50,000

60,000

Figure 31. AD9268-105 DNL with fIN = 9.7 MHz

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