Other Parts Discussed in Thread: TINA-TI, TLV9101, OPA990, , LM2903-Q1
Hello, i am designing a circuit consisting of OPA170 and hope anyone could answer what's wrong with the opamp (as per item#2). all the supply information as per schematic below. V+ and V- are still lower than the supply.
1. in the below circuit i am using Rf=220k and Rin=100k. the 3rd plot shows the feedback calculation (Rf/Rin)(V3+ - V3-) and the 4th plot is the actual simulation. 3rd plot and 4th plot are identical.
2. in the below circuit i am using Rf=220k and Rin=40k. the 3rd plot shows the feedback calculation (Rf/Rin)(V3+ - V3-) and the 4th plot is the actual simulation. however, the simulation is not as per the calculation