SBOSA43A June   2021  – June 2025 TMCS1100-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values
    9. 6.9  Electrical Characteristics
    10. 6.10 Typical Characteristics
      1. 6.10.1 Insulation Characteristics Curves
  8. 7 Parameter Measurement Information
    1. 7.1 Accuracy Parameters
      1. 7.1.1 Sensitivity Error
      2. 7.1.2 Offset Error and Offset Error Drift
      3. 7.1.3 Nonlinearity Error
      4. 7.1.4 Power Supply Rejection Ratio
      5. 7.1.5 Common-Mode Rejection Ratio
      6. 7.1.6 Reference Voltage Rejection Ratio
      7. 7.1.7 External Magnetic Field Errors
    2. 7.2 Transient Response Parameters
      1. 7.2.1 Slew Rate
      2. 7.2.2 Propagation Delay and Response Time
      3. 7.2.3 Current Overload Parameters
      4. 7.2.4 CMTI, Common-Mode Transient Immunity
    3. 7.3 Safe Operating Area
      1. 7.3.1 Continuous DC or Sinusoidal AC Current
      2. 7.3.2 Repetitive Pulsed Current SOA
      3. 7.3.3 Single Event Current Capability
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Current Input
      2. 8.3.2 Input Isolation
      3. 8.3.3 High-Precision Signal Chain
        1. 8.3.3.1 Temperature Stability
        2. 8.3.3.2 Lifetime and Environmental Stability
        3. 8.3.3.3 Frequency Response
        4. 8.3.3.4 Transient Response
      4. 8.3.4 External Reference Voltage Input
      5. 8.3.5 Current-Sensing Measurable Ranges
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Down Behavior
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Total Error Calculation Examples
        1. 9.1.1.1 Room Temperature Error Calculations
        2. 9.1.1.2 Full Temperature Range Error Calculations
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

9.1.1.1 Room Temperature Error Calculations

For room-temperature total-error calculations, specifications across temperature and drift are ignored. As an example, consider a TMCS1100-Q1A1 with a supply voltage (VS) of 3.3V, a VREF of 1.5V, and a worst-case common-mode excursion of 600V to calculate operating-point-specific parameters. Consider a measurement error due to an external magnetic field of 30µT, roughly the magnetic field strength of the Earth. The full-scale current range of the device in specified conditions is slightly greater than 28A; therefore, calculate error at both 25A and 12.5A to highlight error dependence on the input-current level. Table 9-1 shows the individual error components and RSS maximum total error calculations at room temperature under the conditions specified. Relative to other errors, the additional error from CMRR is negligible, and can typically be ignored for total error calculations.

Table 9-1 Total Error Calculation: Room Temperature Example
ERROR COMPONENTSYMBOLEQUATION% MAX TOTAL ERROR AT IIN = 25A% MAX TOTAL ERROR AT IIN = 12.5A
Input offset erroreIos
TMCS1100-Q1
0.24%0.48%
PSRR error ePSRR
TMCS1100-Q1
0.27% 0.54%
CMRR erroreCMRR
TMCS1100-Q1
0.01%0.02%
VREF erroreVREF
TMCS1100-Q1
0.04%0.08%
External Field erroreBext
TMCS1100-Q1
0.11%0.22%
Sensitivity erroreSSpecified in Electrical Characteristics0.7%0.7%
Nonlinearity erroreNLSpecified in Electrical Characteristics0.05%0.05%
RSS total erroreRSS
TMCS1100-Q1
0.88%1.28%