ADAQ7980 datasheet(17/49 Pages) AD

17 / 49 page

Data Sheet

ADAQ7980/ADAQ7988

Rev. 0 | Page 17 of 49

TYPICAL PERFORMANCE CHARACTERISTICS

VDD = 3.5 V to 10 V, V+ = 6.3 V to 7.7 V, V− = −1.0 V to −2.5 V, VIO = 1.7 V to 5.5 V, VREF = 5 V, TA = 25°C, ADC driver in a unity-gain

buffer configuration, fSAMPLE = 1 MSPS (ADAQ7980), fSAMPLE = 500 kSPS (ADAQ7988), and fIN = 10 kHz, unless otherwise noted.

–5

–10

–15

–20

060k

50k

40k

30k

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10k

CODE

POSITIVE INL = +4.3ppm

NEGATIVE INL = –5.8ppm

Figure 5. Integral Nonlinearity vs. Code, REF = 5 V

–5

–10

–15

–20

2048

62048

52048

42048

32048

22048

12048

CODE

POSITIVE INL = +7.8ppm

NEGATIVE INL = –4.0ppm

Figure 6. Integral Nonlinearity vs. Code, V+ = VDD = 5 V, V− = 0 V,

REF = 3.3 V

–100

–120

–140

–40

–20

–60

–80

–160

0500k

400k

300k

200k

100k

450k

350k

250k

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50k

FREQUENCY (Hz)

SNR = 91.77dB

SINAD = 91.56dB

THD = –104.32dB

SFDR = 105.08dBc

Figure 7. FFT, REF = 5 V

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060k

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CODE

POSITIVE DNL = 6.0ppm

NEGATIVE DNL = –6.4ppm

Figure 8. Differential Nonlinearity vs. Code, REF = 5 V

–5

–10

–15

–20

2048

62048

52048

42048

32048

22048

12048

CODE

POSITIVE DNL = 6.9ppm

NEGATIVE DNL = –6.1ppm

Figure 9. Differential Nonlinearity vs. Code, V+ = VDD = 5 V, V− = 0 V,

REF = 3.3 V

–100

–120

–140

–40

–20

–60

–80

–160

0500k

400k

300k

200k

100k

450k

350k

250k

150k

50k

FREQUENCY (Hz)

SNR = 86.87dB

SINAD = 86.85dB

THD = –110.10dB

SFDR = 103.70dBc

Figure 10. FFT, REF = 2.5 V

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