What Is The Ratiometric Input on the PXIe-4439?

Updated Jun 14, 2018

Reported In

Hardware

  • PXIe-4339

Issue Details

I see the specifications sheet lists ratiometric mode input ranges, what is this?

Solution

The ratiometric mode will change the input range on the PXIe-4339 depending on the excitation voltage. As shown below, it can have different ranges depending on if it has greater than 2.75 V or less than 2.5 V.
So if you have 10 V of excitation and have the range set to +/-10mV/V you will have a voltage range of 10 times +/-10mV or +/-100mV. 

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