OPA593 Precision Power Amp

Texas Instruments' OPA593 is a high-voltage (85 V), high-precision, wide-bandwidth (10 MHz), high-output-current (250 mA), unity-gain-stable power op amp that uses a laser trimming technique to improve the offset voltage (20 µV typical) and offset voltage drift (0.4 µV/°C typical), avoiding the need for calibration. This amp features mux-friendly inputs that enable a differential input voltage range to the supply rails and helps improve the settling performance in multi-channel systems.

An external resistor can limit the current with specified accuracy, providing more precise measurements. In overcurrent or overtemperature conditions, the OPA593 indicates erroneous operation through a status flag. The disable feature is used to shut down the device, saving power and placing the output into a high-impedance state. The device is unity-gain stable, enabling operation as a high-impedance buffer. The wide bandwidth and high slew enable high signal gains. The high output current and capacitive drive allow the device to drive external field-effect transistors (FETs) used to provide higher system currents for digital power supplies.