Since the introduction of the OPA593, the power operational amplifier (PA) has gained traction in the test and measurement sector. Specifically designed for Automated Test Equipment (ATE) applications, the OPA593 can drive output voltages up to 80V and output currents up to ±250mA, all within a compact 4mm × 4mm WSON package. The OPA593 operates across the full industrial temperature range of -40°C to 125°C, providing exceptional DC precision and robust output current limiting features that cater to diverse design requirements in ATE applications.

This application note demonstrates how to compensate for the OPA593 PA and current booster configuration, enabling output driving currents up to ±1A. Additionally, the document explains the implementation of the op amp’s dual feedback compensation techniques when driving capacitive loads of up to 1μF, making sure of adequate phase margin, stabilizing loop gains through AC analysis, and achieving fast step time responses in ATE applications.