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

2 Quick-Start Design Checklist

Table 2-1 Quick-Start Design Checklist
Design Parameter Recommended Value Impacts
Bus bar to sensor PCB distance 3-11mm Keeps SNR high while limiting displacement error; farther distances reduce field strength
Sensor placement Devices placed within 1-2mm of bus bar edge Maximizes field
PCB copper under sensor Cut‑out (no solid plane) Copper plane adds significant phase error; cut‑out reduces amplitude/phase error over frequency
Conductor proximity Minimum of 15mm away Surrounding conductors add phase shifts and amplitude errors; physical separation minimizes this impact
Gain 2 headroom Characterized Gain 2 < 16128 Increases margin for frequency‑compensation circuitry