This is a two part question regarding the criticality of VREFs for IQAN Modules. We use an MD4 and XA2 in our system. On the XA2, we use VREF to support a three axis joystick and one pressure transducer (4 VINs).
We received a report from the field that a short circuit between VREF and ground caused the XA2 module to fail completely resulting in "I/O No Contact" IQAN Error Message on the MD4.
Is this a typical or expected failure mode for an XA2 with a damaged 5V reference voltage regulator? Or is it more likely there was a mis-diagnosis from the field? I can't think of a way to validate this without destroying an otherwise healthy XA2.
Would this also be the case in an MC42?
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