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AD7674 Datasheet(PDF) 12 Page - Analog Devices

Part No. AD7674
Description  18-Bit, 2.5 LSB INL, 800 kSPS SAR ADC
Download  28 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7674 Datasheet(HTML) 12 Page - Analog Devices

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AD7674
Rev. A | Page 12 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
CODE
2.5
0
65536
131072
196608
262144
1.5
1.0
0
–1.5
0.5
–0.5
03083-0-005
–1.0
2.0
Figure 5. Integral Nonlinearity vs. Code
CODE IN HEX
70000
2004C
0
60000
40000
20000
0
30000
10000
50000
2004D
0
2004E
87
2004F
5073
20050
59121
20051 20052 20053
47
20054
0
20055
0
VREF = 5V
7165
58556
03083-0-006
Figure 6. Histogram of 131,072 Conversions of a
DC Input at the Code Transition
POSITIVE INL (LSB)
120
0
100
60
20
0
40
80
0.5
1.0
1.5
2.0
03083-0-007
2.5
Figure 7. Typical Positive INL Distribution (424 Units)
CODE
2.0
0
65536
131072
196608
262144
1.5
1.0
0
–1.0
0.5
–0.5
03083-0-008
Figure 8. Differential Nonlinearity vs. Code
CODE IN HEX
90000
2004D
0
60000
40000
20000
0
30000
10000
50000
1
2004E 2004F 20050 20051 20052 20053
627
20054
8
20055
0
VREF = 5V
25964
70000
80000
26939
28939
03083-0-009
793
Figure 9. Histogram of 131,072 Conversions of a
DC Input at the Code Center
NEGATIVE INL (LSB)
100
–2.5
80
60
20
0
50
70
–2.0
–1.5
1.0
–0.5
03083-0-010
90
40
30
10
0
Figure 10. Typical Negative INL Distribution (424 Units)


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