The OPA548 device is a low-cost, high-voltage, and high-current operational amplifier that is designed to drive a wide variety of loads. A laser-trimmed, monolithic, integrated circuit provides excellent low-level signal accuracy and high-output voltage and current.
The OPA548 operates from either single or dual supplies for design flexibility. In single-supply operation, the input common-mode range extends below ground.
The OPA548 is internally protected against overtemperature conditions and current overloads. In addition, the OPA548 is designed to provide an accurate, user-selected current limit. Unlike other designs that use a power resistor in series with the output current path, the OPA548 senses the load indirectly. The current limit is adjustable from 0 A to 5 A with an external resistor and potentiometer, or controllable digitally with a voltage-out or current-out DAC.
The Enable/Status (E/S) pin provides two functions. An input on the pin not only disables the output stage to effectively disconnect the load, but also reduces the quiescent current to conserve power. The E/S pin output can be monitored to determine if the OPA548 is in thermal shutdown.
The OPA548 device is available in an industry-standard 7-lead staggered and straight lead TO-220 package, and a 7-lead DDPAK surface-mount plastic power package. The copper tab allows easy mounting to a heat sink or circuit board for excellent thermal performance. The device is specified for operation over the extended industrial temperature range, –40°C to 85°C. A SPICE macromodel is available for design analysis.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | OPA548 High-Voltage, High-Current Operational Amplifier datasheet (Rev. D) | PDF | HTML | Dec 18, 2019 |
| E-book | An Engineer’s Guide to Designing with Precision Amplifiers | Apr 29, 2021 | ||
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | Mar 28, 2017 | |
| Application note | DC MOTOR SPEED CONTROLLER: Control a DC Motor without Tachometer Feedback | Sep 27, 2000 | ||
| Application note | Power Amplifier Stress and Power Handling Limitations | Sep 27, 2000 |
For additional terms or required resources, click any title below to view the detail page where available.
The OPA548EVM is a platform for evaluating the OPA548 in a variety of circuit configurations. Circuit configuations include inverting/non-inverting gain, single/dual power supply, internal/external load and external reference. Access is provided to the Enable/Shutdown pin and LED's provide visual (...)
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TO-263 (KTW) | 7 | Ultra Librarian |
| TO-220 (KC) | 7 | Ultra Librarian |
| TO-220 (KVT) | 7 | Ultra Librarian |
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