SBOU275 April   2022 INA190-EP

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 INA190-EP Kit Contents
    2. 1.2 Related Documentation From Texas Instruments
  3. 2INA190EPEVM Hardware
    1. 2.1 Features
  4. 3Quick Start Setup and Use
    1. 3.1 Measurements
  5. 4INA190EPEVM Circuit and Components
    1. 4.1 R2x, R3x, R5x, C2x, C3x
    2. 4.2 C1x
    3. 4.3 R1x
    4. 4.4 R6
    5. 4.5 R4x
    6. 4.6 U1x - INA190-EP
    7. 4.7 J0x, J1x
  6. 5Reference Voltage Setup
    1. 5.1 Unidirectional Mode
    2. 5.2 Bidirectional Mode
  7. 6Guarding Voltage - Using the "Guarded Inputs" Panel
  8. 7INA190EPEVM Schematics and PCB Layout
    1. 7.1 Schematics
    2. 7.2 PCB Layout
  9. 8Bill of Materials

4.7 J0x, J1x

J0x and J1x are 0.240 inch non-insulated, quick-fit terminals that are designed to insert into similarly-sized female receptacles. The kit provides two receptacles. Using insulated receptacles with J0x and J1x terminals allows the user to ensure a strong and safe connection between the current source and EVM when dealing with high currents.

WARNING:

If using the EVM to measure currents, ensure a proper power resistor is soldered at the R4x pad and the receptacles (connecting to J0x and J1x) and their crimped wires can support the amperage of the current being measured and the necessary power dissipation. Do not exceed 15 A of current flowing between J0x and J1x. If using the "Guarded Inputs" panel, ensure current flowing from J0 to J1 does not exceed 10 A. Failure to do any of this could result in hot surfaces (> 55°C), damage to the EVM, or personal injury.

Standard metal clips can electrically interface with these tabs for lower currents.

The IN+ (J0x) and IN– (J1x) inputs accept a differential voltage that is amplified by the selected device gain and is presented at the OUT connection point. These inputs could also be used to connect the differential voltage developed across an external shunt in an existing circuit. The acceptable differential input voltage range and polarity are determined by the supply voltage, reference voltage, and gain of the selected device.