AD7687 데이터 시트보기 (PDF) - Analog Devices
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AD7687 Datasheet PDF : 28 Pages
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AD7687
TYPICAL PERFORMANCE CHARACTERISTICS
1.5
POSITIVE INL = +0.32LSB
NEGATIVE INL = –0.41LSB
1.0
0.5
0
–0.5
–1.0
–1.5
0
300000
250000
200000
16384
32768
CODE
49152
Figure 7. Integral Nonlinearity vs. Code
65535
258680
VDD = REF = 5V
150000
100000
50000
0
0
1049
1391
0
0
0
41
42
43
44
45
46
47
CODE IN HEX
Figure 8. Histogram of a DC Input at the Code Center
0
8192 POINT FFT
–20
VDD = REF = 5V
FS = 250KSPS
–40
FIN = 2.1kHz
SNR = 95.5dB
THD = –118.3dB
–60
2nd HARM = –130dB
3rd HARM = –122.7dB
–80
–100
–120
–140
–160
–180
0
20
40
60
80
100
120
FREQUENCY (kHz)
Figure 9. FFT Plot
Data Sheet
1.5
POSITIVE DNL = +0.27LSB
NEGATIVE DNL = –0.24LSB
1.0
0.5
0
–0.5
–1.0
–1.5
0
250000
200000
16384
32768
CODE
49152
Figure 10. Differential Nonlinearity vs. Code
65535
200403
VDD = REF = 2.5V
150000
100000
50000
30721
29918
0
0 60
18 0
0
0
44 45 46 47 48 49 4A 4B 4C
CODE IN HEX
Figure 11. Histogram of a DC Input at the Code Center
0
32768 POINT FFT
–20
VDD = REF = 2.5V
FS = 250KSPS
–40
FIN = 2kHz
SNR = 92.8dB
THD = –115.9dB
–60
2nd HARM = –124dB
3rd HARM = –119dB
–80
–100
–120
–140
–160
–180
0
20
40
60
80
100
120
FREQUENCY (kHz)
Figure 12. FFT Plot
Rev. B | Page 10 of 28
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