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

2.1 Power Supplies

The OPA455EVM can be configured from ±6 V to ±75 V for dual-supply operation, or from 12 V to 150 V for single-supply operation. Shorting pins 2 and 3 of J5 sets the EVM to single supply, and shorting pins 1 and 2 of J5 sets up the EVM for dual supplies. The OPA455 is capable of sourcing or sinking up to 30 mA of current. Power is provided to the EVM through J2 (V+) and J1 (V–). Take care to select supplies capable of providing the required power for the application. Use a supply capable of supplying at least twice the anticipated current at the intended operating voltage.