I'm having an issue with the LMV822MMX/NOPB (formerly Nat Semi version) where the output will latch up to about 1.8V until power is removed. This will happen if the 5V supply rise-time is less than about 3-4us. There seems to be some variation from part to part.
The LMV822DGKR (which has gone EOL) won't latch up in the same circuit with supply rise-times down to 0.86us. I believe that I have ruled out most other possible causes such as inputs being outside the supply rails and insufficient decoupling.
For our application there is room to slow down the rise time to about 5us. However, the supply rise-time or dv/dt parameter is not specified and I presume that there will be some process variation given the variation I have seen - but how much variation? So it is difficult to know what a reasonable rise-time is for this part that will reliably prevent the latch-up condition.
Can anyone please recommend a good approach here or offer some information or rule-of-thumb on what is an acceptable supply rise-time for this part? Our only other option is to switch to a different op-amp.