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OPA172: OPA172 – Internal series resistor 2.5k ohm in each IN-/IN+

Part Number: OPA172
Other Parts Discussed in Thread: LM324

May I know the OPA172 has a internal series resistor 2.5k ohm in each IN- and IN+?

We had try to short IN- to ground (base on figure 46). We find OPA172 has higher short current than LM324. Do you have any suggest why they have this difference? Thanks

BR,

Gary