Part Number:OPA4192
Support Path: /Product/Development and troubleshooting/
Hi,
I'm developing a circuit with OPA4192 that will be under a larger temperature span (-40 to +125oC). It's a precision circuit, so I need to consider offset voltage and offset voltage drift. However, some datasheet information is not clear to me. In OPA4192 datasheet, 6.7 Electrical Characteristics, there are Offset voltage (Vos) max. (25oC) = +-25uV, Vos max (-40oC to +125oC) = +-75uV and Offset Voltage Drift (dVos/dT) max (DW package) = +- 1.0 uV/oC.
The question is: at +125oC, must I consider:
a) only Vos max (+125oC) = +-75uV or,
b) must I include drift contribution 1uV * (125oC - 25oC) = 105uV?
If b) is the correct answer, the maximum voltage offset is +- (75uV + 105uV), or the root square sum of 75uV and 105uV?
Thanks,
Fabio