I am trying to simulate the OPA347 operational amplifier in TINA-TI. There is a basic test circuit in their examples and I am trying to simulate it in order to understand some of the parameters. It is nothing more than your basic non-inverting configuration utilizing the OPA347. You can see the attached schematic. An overview: I have it set up for a gain of 2, 1k load, single supply +5V. My input is 0V DC to start and I expect (ideally) to get 0V out; however, I get 1.854 mV out. The datasheet specifies 2mV of offset typical. There is not minimum and I am content with this result for the most part. The datasheet also says that the output swing voltage can *typically* be 5mV from the rails again there is no minimum specified so that is why I am fairly content with a 1.854 mV output with 0V in. Now, when I input 1V I expect to see 2.001854 V. 2V because of the gain plus the "original" offset but this is my actual result: 1.99986 (-140 uV). If I input 1.5v I expect to see 3.0001854 V. Again 3V due to the gain and plus the "original" offset but again, this is my result: 3.000008V (8 uV). I am aware that if you change the gain, your offset will also increase but even with an increasing gain my results do not show the typical 2 mV of offset. It is all measured in uV! What am I missing? Why is it that when I increase my input voltage my "offset" is in the uV? Why is it no where near what is specified in my datasheet? Any insight would be great.