AD7687BCPZ-R2 datasheet(12/27 Pages) AD

12 / 27 page

Data Sheet

AD7687

Rev. E | Page 11 of 26

TYPICAL PERFORMANCE CHARACTERISTICS

CODE

1.5

1.0

0.5

–0.5

–1.0

–1.5

16384

32768

49152

65535

POSITIVE INL = +0.32LSB

NEGATIVE INL = –0.41LSB

Figure 6. Integral Nonlinearity vs. Code

300000

250000

150000

200000

100000

50000

CODE IN HEX

1049

258680

1391

VDD = REF = 5V

Figure 7. Histogram of a DC Input at the Code Center, VDD = REF = 5 V

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–160

–140

–180

100

120

8192 POINT FFT

VDD = REF = 5V

fS = 250kSPS

fIN = 2.1kHz

SNR = 95.5dB

THD = –118.3dB

2nd HARMONIC = –130dB

3rd HARMONIC = –122.7dB

Figure 8. FFT Plot, VDD = REF = 5 V

CODE

1.5

1.0

0.5

–0.5

–1.0

–1.5

16384

32768

49152

65535

POSITIVE DNL = +0.27LSB

NEGATIVE DNL = –0.24LSB

Figure 9. Differential Nonlinearity vs. Code

250000

150000

200000

100000

50000

CODE IN HEX

30721

200403

29918

VDD = REF = 2.5V

Figure 10. Histogram of a DC Input at the Code Center, VDD = REF = 2.5 V

FREQUENCY (kHz)

–20

–40

–60

–80

–100

–120

–160

–140

–180

100

120

32768 POINT FFT

VDD = REF = 2.5V

fS = 250kSPS

fIN = 2kHz

SNR = 92.8dB

THD = –115.9dB

2nd HARMONIC = –124dB

3rd HARMONIC = –119dB

Figure 11. FFT Plot, VDD = REF = 2.5 V

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