SBOU244 June   2020 INA281

 

  1.   INA281EVM
    1.     Trademarks
    2. 1 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
    3. 2 Overview
      1. 2.1 EVM Kit Contents
      2. 2.2 Related Documentation From Texas Instruments
    4. 3 Hardware
      1. 3.1 Features
    5. 4 Operation
      1. 4.1 Quick Start Setup
      2. 4.2 Measurements
    6. 5 EVM Components
      1. 5.1 R2_Xn, R3_Xn, R4_Xn, C2_Xn, C3_Xn
      2. 5.2 C1_Xn
      3. 5.3 R1_Xn
      4. 5.4 U1_Xn (INA281)
    7. 6 Schematic, PCB Layout, and Bill of Materials
      1. 6.1 Schematics
      2. 6.2 PCB Layout
      3. 6.3 Bill of Materials
        1. 6.3.1 Bill of Materials

4.1 Quick Start Setup

Follow these procedures to set up and use one of the panels of the INA281EVM. For the following instructions, X is pinout A or B, and n is gain option 1, 2, 3, 4, or 5.

  1. Choose the desired gain option panel and pin out variation.
  2. Connect an external dc supply voltage (between 1.7 V and 20 V) to a VS test point, and connect the ground reference of that supply to a GND test point on the same panel.
  3. Provide a differential input voltage signal to the Vin+ and Vin– nodes by connecting the signal leads to the J1_Xn pin 1 and J1_Xn pin 2 on the EVM, as explained in Section 4.2. The INA281 is a unidirectional current-sensing device because there is no reference pin; therefore, the device can only measure current in one direction.