National Instruments 3.21E+04 Benutzerhandbuch
Chapter 3 Hardware Overview
AT-MIO/AI E Series User Manual
3-8
National Instruments Corporation
You can program polarity and range settings on a per channel basis
so that you can configure each input channel uniquely.
so that you can configure each input channel uniquely.
The software-programmable gain on these boards increases their
overall flexibility by matching the input signal ranges to those that
the ADC can accommodate. The AT-MIO-16E-1, AT-MIO-16E-2,
AT-MIO-64E-3, AT-MIO-16E-10, and AT-MIO-16DE-10 have
gains of 0.5, 1, 2, 5, 10, 20, 50, and 100 and are suited for a wide
variety of signal levels. With the proper gain setting, you can use
the full resolution of the ADC to measure the input signal.
Table 3-2 shows the overall input range and precision according to
the input range configuration and gain used.
overall flexibility by matching the input signal ranges to those that
the ADC can accommodate. The AT-MIO-16E-1, AT-MIO-16E-2,
AT-MIO-64E-3, AT-MIO-16E-10, and AT-MIO-16DE-10 have
gains of 0.5, 1, 2, 5, 10, 20, 50, and 100 and are suited for a wide
variety of signal levels. With the proper gain setting, you can use
the full resolution of the ADC to measure the input signal.
Table 3-2 shows the overall input range and precision according to
the input range configuration and gain used.
Table 3-2. Actual Range and Measurement Precision
Range
Configuration
Gain
Actual Input Range
Precision
1
0 to +10 V
1.0
2.0
5.0
2.0
5.0
10.0
20.0
50.0
20.0
50.0
100.0
0 to +10 V
0 to +5 V
0 to +2 V
0 to +1 V
0 to +2 V
0 to +1 V
0 to +500 mV
0 to +200 mV
0 to +100 mV
0 to +200 mV
0 to +100 mV
2.44 mV
1.22 mV
1.22 mV
488.28
µ
V
244.14
µ
V
122.07
µ
V
48.83
µ
V
24.41
µ
V
-5 to +5 V
0.5
1.0
2.0
5.0
1.0
2.0
5.0
10.0
20.0
50.0
20.0
50.0
100.0
-10 to +10 V
-5 to +5 V
-2.5 to +2.5 V
-1 to +1 V
-500 to +500 mV
-250 to +250 mV
-100 to +100 mV
-250 to +250 mV
-100 to +100 mV
-50 to +50 mV
4.88 mV
2.44 mV
1.22 mV
2.44 mV
1.22 mV
488.28
µ
V
244.14
µ
V
122.07
µ
V
48.83
µ
V
24.41
µ
V
1
The value of 1 LSB of the 12-bit ADC; that is, the voltage
increment corresponding to a change of one count in the ADC
12-bit count.
12-bit count.
Note:
See Appendix A, Specifications, for absolute maximum
ratings.