Please tell me the amount of change in offset voltage (V / month, etc.) and the calculation formula when OPA2188 is used for 1000 hours or more.
Thank you.
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You might find this very nice appnote from Marek Lis on long term stability useful:
Kai
Hi,
Keep in mind that the OPA2188 is an auto-zero op amp so it actively works to zero the input voltage offset throughout the life of the op amp.
Regards, Thomas
Precision Amplifiers Applications Engineering