• Resolved

OPA380: Composite op-amp theory, mechanism used for precision

Part Number: OPA380


I would like to understand a little better the mechanism that the OP380 uses in order to have a low output DC offset while being a current feedback op-amp. In the datasheet it mentions it has another internal op-amp which is auto zeroing connected into the non inverting pin like this:

Could the same strategy be used with any current feedback op-amp? For example if I wanted to create a composite op-amp with the THS3125 and OPA188

Thank you!