To facilitate testing with common lab equipment, the OPA810 can be configured to allow for split-supply operation (see the OPA2810DGK Evaluation Module user guide). This configuration eases lab testing because the mid-point between the power rails is ground, and most signal generators, network analyzers, oscilloscopes, spectrum analyzers, and other lab equipment reference the inputs and outputs to ground. Figure 8-1 depicts the OPA810 configured as a noninverting amplifier and Figure 8-2 illustrates the OPA810 configured as an inverting amplifier. For split-supply operation referenced to ground, the power supplies V_S+ and V_S- are symmetrical around ground and V_REF is at GND. Split-supply operation is preferred in systems where the signals swing around ground because of the ease-of-use; however, the system requires two supply rails.