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

3 Quick Start Setup and Use

Follow these procedures to set up and use one of the panels of the INA190EPEVM. For the following instructions, X = 1, 2, 3, 4, 5, or is not present for the guarded input board.

  1. Choose the desired gain option panel.
  2. Ensure valid connections for the enable (EN) and reference (REF) pins for the section under test are set to the appropriate voltages.
    1. For the device to amplify the input signal, it must be enabled by connecting the ENABLE input to a value between 0.7 × Vs and 6 V as per the data sheet. The EN connection of each panel has an option to directly connect to the Vs through R1x, but this is depopulated by default. To create this connection, either place a voltage between 0.7 × Vs and 6 V on the EN connection point, or solder a 0-Ω resistor at R1x to permanently enable the device under test.
    2. For the device to have a ground reference, the REF input must be connected to the same connection as GND. If a custom reference voltage is desired, drive the REF input with an external voltage source set at the desired voltage.
  3. Connect an external DC supply voltage between 1.7 V and 5.5 V to one of the VS inputs, and connect the ground reference of that supply to a GND test point on same panel.
  4. Provide an input voltage signal (referenced to GND) to the IN+ and IN– pins by connecting signal leads to J0x and J1x quick-fit tabs. This is explained in Section 3.1.