Considerations For Selecting Input Ranges; Table 3-3. Actual Range And Measurement Precision, Pci-Mio-16Xe-10 Pci-Mio-16Xe-50, Pci-6031E, Pci-6032E, And Pci-6033E - National Instruments DAQ PCI E Series User Manual

Chapter 3 Hardware Overview
PCI E Series User Manual
Table 3-3 shows the overall input range and precision according to the
input range configuration and gain used.
Table 3-3. Actual Range and Measurement Precision, PCI-MIO-16XE-10,
PCI-MIO-16XE-50, PCI-6031E, PCI-6032E, and PCI-6033E
Range Gain
Configuration
0 to +10 V
10.0
20.0
50.0
100.0
-10 to +10 V
10.0
20.0
50.0
100.0
1
The value of 1 LSB of the 16-bit ADC; that is, the voltage increment
corresponding to a change of one count in the ADC 16-bit count
2
Not available on the PCI-MIO-16XE-50
Note: See Appendix A, Specifications, for absolute maximum
ratings.

Considerations for Selecting Input Ranges

Which input polarity and range you select depends on the expected
range of the incoming signal. A large input range can accommodate a
large signal variation but reduces the voltage resolution. Choosing a
smaller input range improves the voltage resolution but may result in
the input signal going out of range. For best results, match the input
range as closely as possible to the expected range of the input signal.
For example, if you are certain the input signal will not be negative
(below 0 V), unipolar input polarity is best. However, if the signal is
negative or equal to zero, you will get inaccurate readings if you use
unipolar input polarity.
Actual Input Range
1.0 0 to +10 V
2.0 0 to +5 V
2
5.0 0 to +2 V
0 to +1 V
2
0 to +500 mV
2
0 to +200 mV
0 to 100 mV
1.0 –10 to +10 V
2.0 –5 to +5 V
2
5.0 –2 to +2 V
–1 to +1 V
2
–500 to +500 mV
2
–200 to +200 mV
–100 to +100 mV
3-8
Precision
152.59 µV
76.29 µV
30.52 µV
15.26 µV
7.63µV
3.05 µV
1.53 µV
305.18 µV
152.59 µV
61.04 µV
30.52 µV
15.26 µV
6.10 µV
3.05 µV
© National Instruments Corporation
1