SDAA488 August   2026 AMC0106M05 , AMC0106M25

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1System Introduction
  5. 2Inline Current Sense Device Options
    1. 2.1 Common-Mode Voltage Versus Working Voltage
    2. 2.2 Device Architecture Comparison
      1. 2.2.1 INA241: Non-Isolated Analog Amplifier with Inherent PWM Rejection
      2. 2.2.2 AMC0106: High CMRR Functionally Isolated Delta-Sigma Modulator
    3. 2.3 Performance Benefits Analysis
      1. 2.3.1 Accuracy and Precision
      2. 2.3.2 Noise Immunity
      3. 2.3.3 Size
      4. 2.3.4 Design Considerations
  6. 3Summary
  7. 4References

2 Inline Current Sense Device Options

For shunt-based systems isolated and non-isolated current sense devices which can handle high common mode voltage and high common mode voltage transients can be used.

The choice between isolated and non-isolated current sensing architectures involves trade-offs between accuracy, effective resolution and signal to noise ratio, propagation delay, system-level noise immunity, analog or digital interface to the microcontroller and more.

Let us look into TI's latest galvanically isolated modulator AMC0106M05 and AMC0106M25, as well as the non-isolated INA241A bidirectional ultra-precise current sense amplifier with enhanced PWM rejection. Both devices are capable of achieving better than 1% accuracy requirements demanded by precision motor control applications such as battery operated low-voltage drones, and 24V to 60V robotics and servo drives.