SDAA048 July   2025 DRV8376

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Advantages and Challenges of Low-Side Current Sensing with DRV8376
    1. 2.1 Advantages of Low Side Current Sensing
      1. 2.1.1 Low Common Mode Voltage
      2. 2.1.2 Cost Effectiveness
    2. 2.2 Challenges of Low side Current Sensing
      1. 2.2.1 Gain Error
      2. 2.2.2 Temperature Drift
  6. 3DRV8376 Current Sense Amplifier (CSA) Architecture
    1. 3.1 Gain Error vs Temperature
    2. 3.2 Calibration Methods
  7. 4Summary
  8. 5References

2.2.2 Temperature Drift

Temperature variations exacerbate gain error through the temperature coefficient of the internal gain network of the CSA (typically 20ppm/°C) and external components, such as PCB traces or shunt resistors (50–200ppm/°C). Over the operating range of -40°C to +150°C of the DRV8376, even a low temperature coefficient can result in noticeable drift. For instance, a 20ppm/°C drift over a 100°C range causes a 0.2% gain error, which can translate to measurable errors in the SOx output, impacting system reliability in harsh environments such as automotive or industrial settings.