The OPA705 opamp, a very commonly used opamp, is available in several packages. The most common is the 8-lead dual in-line package (DIP). In Figure 2, you can see the number of the pins and the description for each. It should be noted that pins 4 and 7 are negative and positive power supply connections to the op-amp. In all opamps, even if not shown explicitly, these pins must be connected to the power supply rails. The power supply voltages, as well as input and output voltages are referenced to the common ground of the circuits. Connect the positive supply pin (7) of the op-amp to the V pin on Analog Discovery 2, and negative supply pin (4) to the V- pin. Set the power supplies in WaveForms to 5V and -5V. You may ignore the NC (no connect) pins (pins 1 5, and 8)