NI 5741 Absolute Accuracy

[johndigsby85]

I've been looking at a lot of PXI and C Series accuracy specs, which usually give either an absolute figure at full range or a percentage gain/offset.

The specs for the 5741 (https://www.ni.com/docs/en-US/bundle/ni-5741-seri/resource/373937b.pdf) are written very differently, and include other components (like DNL) that don't appear in the other specs I have seen.  How can I calculate the absolute accuracy at full scale?

[NIRebecca · Accepted solution]

Hey Johndigsby85,

Have you checked out any of the documents on how to calculate absolute accuracy? They should be a great starting point 

Calculating Absolute Accuracy or System Accuracy

Calculate Absolute Accuracy of Dynamic Signal Acquisition Devices

If the spec has the INL named, this can be treated as a worst case DNL offset, and you don't need to worry about DNL for absolute accuracy calculations. (see Differential Non-Linearity (DNL) )

Hope this helps,

Rebecca