AD7380 datasheet(10/31 Pages) AD

10 / 31 page

AD7381-4

Data Sheet

Rev. 0 | Page 10 of 31

TYPICAL PERFORMANCE CHARACTERISTICS

–180

–160

–140

–120

–100

–80

–60

–40

–20

0.2

0.4

0.6

0.8

1.0

FREQUENCY (MHz)

SNR = 84.9dB

THD = –110.3dB

SNRD = 84.9dB

fIN = 1kHz

Figure 10. Fast Fourier Transform (FFT), 1 kHz Input Tone, −0.5 dBFS, Internal

Reference = 2.5 V

–160

–140

–120

–100

–80

–60

–40

–20

0.2

0.4

0.6

0.8

1.0

FREQUENCY (MHz)

SNR = 92.82dB

THD = –104.6dB

SNRD = 92.5dB

fIN = 1kHz

Figure 11. FFT, 1 kHz Input Tone, −0.5 dBFS, External Reference = 3.3 V

–0.5

–0.4

–0.3

–0.2

–0.1

0.1

0.2

0.3

0.4

0.5

–8000

–6000

–4000

–2000

2000

4000

6000

8000

CODE

Figure 12. INL vs. Code

–0.5

–0.4

–0.3

–0.2

–0.1

0.1

0.2

0.3

0.4

0.5

–8000

–6000

–4000

–2000

2000

4000

6000

8000

CODE

Figure 13. DNL vs. Code

13543

40000

80000

120000

160000

200000

240000

280000

–4

–3

–2

–1

CODE

249256

AINx+ = AINx– = VREF/2

262799 SAMPLES

Figure 14. Code Histogram

100

1000

FREQUENCY (kHz)

VREF = 2.5V (EXTERNAL)

VREF = 3.3V (EXTERNAL)

Figure 15. SNR vs. Frequency

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