SDAA489 August   2026 TMCS2100-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Quick-Start Design Checklist
  6. 3Bus Bar Design
    1. 3.1 Straight Bus Bar
    2. 3.2 Bus Bars with a Bend
  7. 4Surrounding Conductors / Magnetic Materials
    1. 4.1 Straight Bus Bar
    2. 4.2 Bus Bars with a Bend
    3. 4.3 Ambient Fields
  8. 5PCB Cutouts
  9. 6Device Placement
    1. 6.1 Field Strength
      1. 6.1.1 Distance from Bus Bar to Sensor
      2. 6.1.2 Sensor-to-Sensor Spacing
      3. 6.1.3 Full-Scale Range and Device Gain Variants
        1. 6.1.3.1 Device Gain Variants
        2. 6.1.3.2 Full-Scale Range
        3. 6.1.3.3 Plot Similarities
      4. 6.1.4 Gain Considerations
  10. 7Simulation Tools
    1. 7.1 DC Simulation Tool
    2. 7.2 AC Simulation Tool
  11. 8Characterization Requirements
  12. 9References

4 Surrounding Conductors / Magnetic Materials

When designing in the TMCS2100-Q1 it is important to be mindful of surrounding conductors and magnetic materials as these can introduce offsets and phase shifts. The simulations for the different bus bars mentioned above were repeated with conductors above and below the bus bars and the results are shown here. It should be noted that different materials have different effects based on their relative permeability and conductivity. For example, copper has a higher conductivity than aluminum and will therefore be more impacted by eddy current effects.

The simulations reveal an asymmetry in how conductor placement affects sensor performance. When a conductor exists only below the bus bar, amplitude errors reach 20-25% and phase errors 8-10°—far exceeding the errors when a conductor is present above and below or above only.