Input Impedance of the NI 6341

Updated Feb 27, 2019

Reported In

Hardware

  • USB-6341
  • PCIe-6341
  • PXIe-6341

Issue Details

I would like to know the input impedance of the NI 6341 X Series Data Acquisition Card at its analog input channels. How large is the input impedance? Is the input impedance frequency dependent?

Solution

The input impedance of the NI 6341 depends on the state of the device. When the device power is on, the input impedance between AI+ and AI GND, as well as between AI- and AI GND is frequency dependent. See the NI 6341 Specification document to get the correct input impedance for each device state.

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