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

4.1 R2x, R3x, R5x, C2x, C3x

R2x, R3x, and R5x are factory-installed, 0-Ω resistors, and C3x is a factory-installed input filter capacitor. C2x are not populated by default. Collectively, these pads allow for user-defined filters for the differential input voltage and output voltage. If a filter is desired, remove these resistors and replace them with > 0-Ω SMT resistors and populate the capacitor pads with capacitors corresponding to the desired cutoff frequency. Additional information regarding the use of input filtering, as well as calculation of desired cutoff frequencies is provided in INA190-EP Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range Precision Current Sense Amp.