SBOU327 December   2025 OPA598

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Overview
    1. 1.1 Getting Started
      1. 1.1.1 Related Documentation From Texas Instruments
    2. 1.2 High-Voltage Warning and Safe Use
    3. 1.3 Electrostatic Discharge Caution
  8. 2Hardware
    1. 2.1 Jumper Blocks, Jacks, and Test Points
    2. 2.2 Inputs
    3. 2.3 Outputs
    4. 2.4 Enable or Disable
    5. 2.5 Status Flags
      1. 2.5.1 Circuit Protection
  9. 3Application Circuits
    1. 3.1 Setting Dual-Supply or Single-Supply Operation
      1. 3.1.1 Dual-Supply Operation Configuration
      2. 3.1.2 Single-Supply Operation Configuration
    2. 3.2 Common Op-Amp Configurations
      1. 3.2.1 Inverting Gain of –10 V/V
        1. 3.2.1.1 External Connections for –10 V/V Inverting Gain Configuration
        2. 3.2.1.2 Inverting Gain of –10 V/V Configuration Electrical Performance
      2. 3.2.2 Noninverting Gain of +11 V/V
        1. 3.2.2.1 External Connections for Noninverting Gain Configuration
        2. 3.2.2.2 Noninverting Gain Configuration Electrical Performance
      3. 3.2.3 Gain of +10 V/V Difference Amplifier
        1. 3.2.3.1 Jumper Shunt Locations for Difference-Amplifier Configuration
        2. 3.2.3.2 Gain of 10 V/V Difference Amplifier Configuration Electrical Performance
      4. 3.2.4 Improved Howland Current Pump
        1. 3.2.4.1 OPA598EVM Jumper Shunt Locations for an Improved Howland Current Pump
  10. 4Hardware Design Files
    1. 4.1 EVM Schematic
      1. 4.1.1 EVM Default Configuration
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Reference
    1.     Trademarks

4.1.1 EVM Default Configuration

The OPA598EVM ships in a configuration that allows the EVM to be directly applied as an inverting or noninverting amplifier. The jumper shunts as positioned establish the OPA598 as either an inverting amplifier having a gain of –1 V/V when J5 is driven, or a noninverting amplifier having a gain of +2 V/V when J9 is driven. J9 has a 49.9‑Ω, 2-W input terminator connected by a jumper shunt into the input circuit. An external 50-Ω terminator can be placed at the J5 BNC connector when 50-Ω termination is required.

Figure 4-2 shows the default configuration schematic. The complete OPA598 EVM schematic is extensive; therefore, this simplified default schematic is provided to help make the amplifier configuration apparent. See Figure 4-1 for the entire OPA598EVM circuitry and how the Figure 4-2 circuit fits within.

The jumper shunt installations illustrated in Figure 4-2 are designated in the bill of material as a shunt, with an SH-J# part designator. The jumper shunts in Figure 4-2 appear as the red jumpers connected across the various JP# jumper blocks. Arbitrary SH-J# shunt numbers are assigned for this circuit only.

OPA598EVM Simplified Schematic of OPA598EVM Amplifier Default ConfigurationFigure 4-2 Simplified Schematic of OPA598EVM Amplifier Default Configuration