SBOU240 October   2020 OPA455

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 OPA455
    2. 1.2 OPA455EVM
    3. 1.3 Related Documentation
    4. 1.4 Evaluation Module Limitations and Cautions
      1. 1.4.1 High-Voltage Warning
      2. 1.4.2 Electrostatic Discharge Caution
  3. 2Getting Started
    1. 2.1 Power Supplies
    2. 2.2 Jumpers
    3. 2.3 Inputs
    4. 2.4 Outputs
    5. 2.5 Enable or Disable (E/D)
    6. 2.6 Status Flag
      1. 2.6.1 Circuit Protection
  4. 3Application Circuits
    1. 3.1 Improved Howland Current Pump
  5. 4Schematic, PCB Layout, and Bill of Materials
    1. 4.1 EVM Schematic
    2. 4.2 EVM Default Configuration
    3. 4.3 PCB Layout
    4. 4.4 Bill of Materials

1.1 OPA455

The OPA455 is a precision power amplifier capable of operating over a very wide supply range of ±6 V to ±75 V, with an input common-mode range that extends to within a few volts from each rail. This amplifier is composed of an internal differential input amplifier stage, followed by a voltage amplifier, and finally, a high-current output stage. This device is designed to avoid phase inversion problems that are typically found in similar op amps. The OPA455 is unity-gain stable, and comes in an SO PowerPAD™ package.