Chapter 3 Hardware OverviewNational Instruments Corporation3-5VXI-MIO Series User Manual♦ VXI-MIO-64XE-10This module has two input polarities—unipolar and bipolar. TheVXI-MIO-64XE-10 has a unipolar input range of 10 V (0 to 10 V)and a bipolar input range of 20 V (± 10 V). You can programpolarity and range settings on a per channel basis so that you canconfigure each input channel uniquely.Note: You can calibrate your VXI-MIO-64XE-10 analog input circuitry foreither a unipolar or bipolar polarity. If you mix unipolar and bipolarchannels in your scan list and you are using NI-DAQ, then NI-DAQ willload the calibration constants appropriate to the polarity for which analoginput channel 0 is configured.The software-programmable gain on this module increases itsoverall flexibility by matching the input signal ranges to those thatthe ADC can accommodate. The VXI-MIO-64XE-10 has gains of1, 2, 5, 10, 20, 50, and 100. These gains are suited for a wide varietyof signal levels. With the proper gain setting, you can use the fullresolution of the ADC to measure the input signal. Table 3-3 shows-5 to +5 V 0.51.02.05.010.020.050.0100.0-10 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-50 to +50 mV4.88 mV2.44 mV1.22 mV488.28 μV244.14 μV122.07 μV48.83 μV24.41 μV1 The value of 1 LSB of the 12-bit ADC; that is, the voltageincrement corresponding to a change of one count in the ADC12-bit count.Note: See Appendix A, Specifications, for absolute maximumratings.Table 3-2. Actual Range and Measurement Precision (Continued)RangeConfigurationGain Actual Input Range Precision1
