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It seems that the contents described in the operational amplifier OPA549 data sheet and the actual operation of the product are not consistent, so please check.
In the POWER SUPPLIES section of the OPA549 data sheet p.8, it is stated that "Package tab is internally connected to V-; however, do not use the tab to conduct current." However, when using an actual device, V- voltage does not appear on Tab. Also, when measuring the resistance between the V-pin and Tab with OPA549 alone, it is isolated. Am I correct in understanding that the data sheet description is incorrect?