Non-inverting: Gain = 1 + R_f/R_in (output in phase with input, very high input impedance). Inverting: Gain = −R_f/R_in (output 180° out of phase, input impedance ≈ R_in). Bandwidth estimate uses the single-pole approximation BW ≈ GBW ÷ |Gain|, valid for a standard voltage-feedback op-amp — check your specific op-amp's datasheet for its real gain-bandwidth product and any slew-rate limits at your signal amplitude.