SBOU326 February   2025 INA187 , INA299

 

  1.   1
  2. 1Description
  3. 2Features
  4.   4
  5. 3Evaluation Module Overview
    1. 3.1 Introduction
    2. 3.2 Kit Contents
    3. 3.3 Specification
    4. 3.4 Device Information
  6. 4Hardware
    1. 4.1 Setup
      1. 4.1.1 Quick Start Setup
      2. 4.1.2 Measurements
    2. 4.2 Circuitry
      1. 4.2.1 R1_n, R2_n, R3_n, C2_n, C5_n
      2. 4.2.2 C1_n
      3. 4.2.3 R4_n
      4. 4.2.4 U1_n
    3. 4.3 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  8. 6Additional Information
    1. 6.1 Trademarks
  9. 7Related Documentation

4.2.4 U1_n

Table 4-1 INA187EVM
Designator QTY Value Description Package Reference Part Number Manufacturer
U1 1 -2V to 42V, Bi-directional, 650kHz, High-Precision Current Sense Amplifier DBV (SOT-23, 6)

INA187AnIDBVR

 Texas Instruments
Table 4-2 INA299EVM
Designator QTY Value Description Package Reference Part Number Manufacturer
U1 1 -2V to 80V, Bi-directional, Precision Current Sense Amplifier DBV (SOT-23, 6)

INA299AnIDBVR

 Texas Instruments
U1_n is the location for the INA187n or INA299n test device.

Consider these factors when selecting the appropriate device gain:

  • The differential input voltage is either applied across the inputs or developed based on the load current that flows through the shunt resistor.
  • Make sure that the output voltage does not exceed the supply voltage. This limiting factor requires attention to device selection.
  • The selected device must allow the output voltage to remain within the acceptable range after the developed input voltage is amplified by the respective device gain. The output voltage must remain within the device-specified swing limitations for response in the linear range.
  • An output below the minimum allowable output requires a device with a higher gain. Likewise, an output above the maximum allowable output requires a device with a lower gain.