Measurement Computing CIO-DAS16 User Manual
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Differential Inputs
Differential inputs measure the voltage between two distinct input signals. Within a certain range (referred to as the
common mode range), the measurement is almost independent of signal source to CIO-DAS16/F ground variations. A
differential input is also much more immune to EMI than a single-ended one. Most EMI noise induced in one lead is also
induced in the other, the input only measures the difference between the two leads, and the EMI common to both is
ignored. This effect is a major reason there is twisted pair wire as the twisting assures that both wires are subject to
virtually identical external influence. Figure 3-2 below shows a typical differential input configuration.
Figure 3-2. Differential Input Configuration
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