As with any high-speed operational amplifier, best dynamic performance can be achieved by minimizing the capacitive load. Because a load capacitance presents a decreasing impedance at higher frequency, a load capacitance which is easily driven by a slow op amp can cause a high-speed op amp to perform poorly. See the typical curves showing settling times as a function of capacitive load. The lower bandwidth makes the OPA627 a better choice for driving large capacitive loads. Figure 6-6 shows a circuit for driving very large load capacitance. The two-pole response of this circuit can also be used to sharply limit system bandwidth, often useful in reducing the noise of systems which do not require the full bandwidth of the OPA627.

Figure 6-6 Driving Large Capacitive Loads