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ADS8317I データシート(PDF) 17 Page - Texas Instruments

部品番号 ADS8317I
部品情報  16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER
PDF  29 Pages
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

ADS8317I データシート(HTML) 17 Page - Texas Instruments

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5
4
3
2
1
0
-1
0
0.5
1.0
1.5
2.0
2.5
V
(V)
REF
Single-EndedInput
V
=5V
DD
3.8
2.8
2.2
-0.3
0
5
4
3
2
1
0
-1
0
0.5
1.0
1.5
2.0
2.5
V
(V)
REF
DifferentialInput
V
=5V
DD
3.8
2.75
0.95
-0.3
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
0
0.25
0.50
0.75
1.00
1.25
V
(V)
REF
Single-EndedInput
1.5
1.5
0.95
-0.3
V
=2.7V
DD
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
0
0.25
0.50
0.75
1.00
1.25
V
(V)
REF
DifferentialInput
V
=2.7V
DD
1.5
1.5
0.5
-0.3
0
ADS8317
SBAS356A – JUNE 2007 – REVISED SEPTEMBER 2007
Figure 38. Single-Ended 5V Input,
Figure 40. Differential 2.7V Input,
Common Voltage Range vs VREF
Common Voltage Range vs VREF
Figure 39. Single-Ended 2.7V Input,
Figure 41. Differential 2.7V Input,
Common Voltage Range vs VREF
Common Voltage Range vs VREF
When the input is differential, the amplitude of the
In each case, care should be taken to ensure that the
input is the difference between the +IN and –IN input,
output impedance of the sources driving the +IN and
or +IN – (–IN). A voltage or signal is common to both
–IN inputs are matched. If this matching is not
of these inputs. The peak-to-peak amplitude of each
observed, the two inputs could have different settling
input is VREF about this common voltage. However,
times. This difference may result in offset error, gain
since
the
inputs
are
180
° out-of-phase, the
error, and linearity error that change with both
peak-to-peak amplitude of the difference voltage is 2
temperature and input voltage. If the impedance
× V
REF. The value of VREF also determines the range
cannot be matched, the errors can be lessened by
of the voltage that may be common to both inputs, as
giving the ADS8317 additional acquisition time.
shown in Figure 41 and Figure 40.
Copyright © 2007, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Link(s): ADS8317



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