In which mode does an OP AMP exhibit its high stability characteristics?

The closed loop mode is the configuration in which an operational amplifier (op-amp) exhibits its high stability characteristics. In this mode, feedback is applied from the output to the inverting input of the op-amp, allowing for better control over the gain of the amplifier. This feedback mechanism serves to stabilize the circuit by reducing the effects of variations in the op-amp's characteristics and external conditions.

As a result, the closed loop configuration not only enhances stability but also provides more predictable and precise performance, making it less susceptible to oscillations or instability that might be encountered in open loop configurations, where no feedback is utilized. Closed loop operation effectively lowers the gain of the op-amp while improving bandwidth and linearity, essential attributes when designing analog circuits where consistent performance is critical.