Other Parts Discussed in Thread: LMV331, , TL331, LM393
Hi there,
say i have a quadruple comparator with FIT rating 2.2 like the LM399 (A generic single one like the LMV331 has a FIT rating of 11.6).We have now the following discussion
One argumentation goes like: "If a failure occurs 4 Inputs have failed hence it would be better to use single comps so only one fails."
The argument against that: " The shared parts on the quadruple device are the most unlikely to fail when they have reached "the bottom of the tub" because now the inputs themselves are most prone to fail because of external stimulus. And if one of them fails for that reason only the one channel would go down, not all four."
Now my questions:
Is the FIT Rating a good indicator for above and can i use it to close that argument with data?
How do the shared parts in a multi part device influence failure rate? To clarify: Are they most , equally or least prone to fail or in other words is the assumption from above correct?
Can i equally divide the FIT Rating between each channel of the, in case of the LM339, four channels? If not why?
Thanks in Advance