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AD7607 数据表(PDF) 27 Page - Analog Devices

部件名 AD7607
功能描述  8-Channel DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC
PDF  32 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7607 数据表(HTML) 27 Page - Analog Devices

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Data Sheet
AD7608
Rev. A | Page 27 of 32
Figure 46 to Figure 52 illustrates the effect of oversampling on
the code spread in a dc histogram plot. As the oversample rate
is increased, the spread of codes is reduced. (In Figure 46 to
Figure 52, AVCC = VDRIVE = 5 V and the sampling rate was scaled
with OS ratio.)
0
200
400
600
800
1000
1200
1400
1600
–9 –8 –7 –6 –5 –4 –3 –2 –1
0
CODE
1
2
3
4
5
6
7
8
9
3
3 35
82
708
1001
NO OVERSAMPLING
1170
1377
1208
852
588
328
146
66
21 5 0
188
411
Figure 46. Histogram of Codes—No OS (18 Codes)
0
200
400
600
800
1000
1400
1800
1200
1600
2000
–8
–7
–6
–5
–4 –3 –2 –1
0
CODE
1
2
3
4
5
6
0
1
15
OVERSAMPLING BY 2
1524
1759
1397
902
498
165
57
9
54
208
538
1065
Figure 47. Histogram Of Codes—OS × 2 (14 Codes)
500
0
1000
1500
2000
2500
–5
–4
–3
–2
–1
0
CODE
1
2
3
4
5
OVERSAMPLING BY 4
1551
2224
1913
1072
427
64
14
4
40
199
684
Figure 48. Histogram of Codes—OS × 4 (11 Codes)
0
500
1000
1500
2000
2500
3000
3500
–4
–3
–2
–1
0
CODE
1
2
3
4
OVERSAMPLING BY 8
3027
1756
457
44
2
4
78
2176
648
Figure 49. Histogram of Codes—OS × 8 (9 Codes)
OVERSAMPLING BY 16
0
500
1000
1500
2000
3000
4000
2500
3500
4500
–2
–1
0
CODE
1
3
2
3947
385
2703
7
1081
69
Figure 50. Histogram of Codes—OS × 16 (6 Codes)
OVERSAMPLING BY 32
0
1000
2000
3000
4000
5000
6000
–2
–1
0
CODE
1
2
5403
17
1460
1301
11
Figure 51. Histogram of Codes—OS × 32 (5 Codes)



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