SBOU254A January   2021  – June 2021 INA2191

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 EVM Kit Contents
    2. 1.2 Related Documentation From Texas Instruments
  3. 2Hardware
    1. 2.1 Features
  4. 3Operation
    1. 3.1 Quick Start Setup
    2. 3.2 Measurements
  5. 4EVM Components
    1. 4.1 R1n, R2n, R3n, R4n, R5n, R6n, C1n, C2n, C4n, C5n
      1. 4.1.1 J5n, J6n, JA1n, JA2n
    2. 4.2 C3n
    3. 4.3 Rs1n and Rs2n (Rshunt)
      1. 4.3.1 R7n, R8n
    4. 4.4 U1n (INA2191)
    5. 4.5 S1n, S2n, S3n, S4n, S5n, S6n, S7n, S8n, S9n, SA1n, SA2n, SA3n, SA4n, SA5n, SA6n, SA7n, SA8n, SA9n
  6. 5Schematic, PCB Layout, and Bill of Materials
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  7. 6Revision History

3.1 Quick Start Setup

Follow these procedures to set up and use one of the INA2191EVM panels. For these instructions, n is gain option 1, 2, 3, 4, or 5.

  1. Choose the desired gain option by choosing the panel with the label showing the desired gain.

  2. Choose the settings for the enable (EN1 and EN2) and reference (REF1 and REF2) pins using jumpers JA2n and JA1n for the enable pins and J5n and J6n for the reference pins.

  3. Shorting an enable pin to the supply voltage (Vs) turns the device's corresponding channel on, while shorting the enable pin to ground turns this channel off.

  4. Shorting the reference pin to ground biases the output of the corresponding channel to ground, while shorting the reference pin to Vs/2 pin biases the output of the corresponding channel to mid-supply. Note that the on-board Vs/2 voltage is available to easily bias the device with no extra source; however, it is best practice to drive the reference pin with a low-impedance voltage source and thus inserting a buffer in between Vs/2 and the reference pin will ensure performance according to device datasheet specifications.

  5. Connect an external DC supply voltage (between 1.7 V and 5.5 V) to a VS test point. Connect the ground reference of that supply to a GND test point on the same panel.
  6. Provide a differential input voltage signal across the input pins and ensure the common-mode voltage (VCM) of this differential signal is within the operational VCM rating of the device.
    1. The differential signal should be supplied across the input pins by driving the signal across J1n and J2n for channel 1 or J3n and J4n for channel 2 on the EVM, as explained in Section 3.2.

  7. Check to make sure all grounds of the sources and EVM are common and connected with low-impedance connections.