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

3 Summary

The AMC0106M05 isolated current sense modulator and the INA241 non-isolated current sense amplifier each offer unique advantages for precision motor control applications. The AMC0106M05's isolated delta-sigma architecture provides inherent immunity to ground loops, PWM switching noise, and other electrical disturbances through galvanic isolation and dual-ground design. This allows the device to maintain exceptional accuracy and resolution without requiring external blanking or timing coordination. Conversely, the high-performance analog approach of the INA241 prioritizes speed and simplicity, complemented by advanced PWM rejection filtering that minimizes the impact of switching transients.

TechnologyShunt + AMC0106MxxShunt + INA241x
Example deviceAMC0106M05INA241A3
Evaluation ModuleBP-AMC0106-LMG-MDINA241AEVM
Current range (FSR)8 scalable up to ±200Ascalable up ±200A
Overload currenthigh (18x FSR)high (18x FSR)
Accuracy (-40..85°C, TYP)<1%<1%
ENOB (SNR)>12bit9 ..11-bit
Bandwidth40kHz - 160kHz (Sinc3 OSR32-128)1MHz
Propagation delay

medium (2.4 .. 9.6us)

due to Sinc3 filter

low (0.25µs)
Immunity to GND noisehigh (digital interface)medium (analog interface)
PWM rejectionhigh (Functional isolation)medium
Isolated supplyYesno
Other requirementsMCU with sinc filter AND high side power neededVoltage reference for best accuracy