5.3 Unity Gain

Unity gain, also known as a voltage-follower or buffer, is a configuration of the operational amplifier that causes the voltage applied to the non-inverting input to be matched by the output. Unity gain is commonly used to buffer high-impedance sources, such as resistor dividers. The OPA module has an internal switch to enable unity gain operation without the need for an external wire, as shown in Example 5-3. See section 4.5 Unity Gain for more information about this feature.