Huiyun,
Were the devices purchased through an authorized distributor or direct from TI? Below is a list of authorized distributors.
Arrow Electronics
Digi-Key Electronics
Mouser Electronics
The reason for the question is that counterfeit devices do…
Fabio,
Both channels of OPA2277 dual op amp are laser trimmed virtually to zero but the physical stress associated with the packaging of the die causes the random shift in the input offset voltage and drift. For that reason, there is no correlation between…