AD9258 datasheet(19/45 Pages) AD

19 / 45 page

AD9258

Rev. A | Page 18 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 14. AD9258-80 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 15. AD9258-80 Single-Tone SNR/SFDR vs. Input Frequency (fIN)

with 2 V p-p Full Scale

105

100

SAMPLE RATE (MSPS)

SNR, CHANNEL B

SFDR, CHANNEL B

SNR, CHANNEL A

SFDR, CHANNEL A

Figure 16. AD9258-80 Single-Tone SNR/SFDR vs. Sample Rate (fS)

with fIN = 70.1 MHz

800,000

700,000

600,000

500,000

400,000

300,000

200,000

100,000

N – 3

N – 2

N – 1

N + 1

N + 2

N + 3

OUTPUT CODE

Figure 17. AD9258-80 Grounded Input Histogram

–2

–1

DITHER ENABLED

DITHER DISABLED

2000

4000

6000

8000

10,000 12,000 14,000 16,000

OUTPUT CODE

Figure 18. AD9258-80 INL with fIN = 9.7 MHz

0.50

0.25

–0.25

–0.50

OUTPUT CODE

2000

4000

6000

8000

10,000 12,000 14,000 16,000

Figure 19. AD9258-80 DNL with fIN = 9.7 MHz

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