SBOSAG7 April   2025 TMCS1143

ADVANCE INFORMATION  

  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 Limiting Values
    8. 6.8 Electrical Characteristics
  8. 7 Typical Characteristics
    1. 7.1 Insulation Characteristics Curves
  9. 8 Parameter Measurement Information
    1. 8.1 Accuracy Parameters
      1. 8.1.1 Sensitivity Error
      2. 8.1.2 Offset Error and Offset Error Drift
      3. 8.1.3 Nonlinearity Error
      4. 8.1.4 Power Supply Rejection Ratio
      5. 8.1.5 Common-Mode Rejection Ratio
      6. 8.1.6 External Magnetic Field Errors
    2. 8.2 Transient Response Parameters
      1. 8.2.1 CMTI, Common-Mode Transient Immunity
    3. 8.3 Safe Operating Area
      1. 8.3.1 Continuous DC or Sinusoidal AC Current
      2. 8.3.2 Repetitive Pulsed Current SOA
      3. 8.3.3 Single Event Current Capability
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Current Input
      2. 9.3.2 Ambient Field Rejection
      3. 9.3.3 High-Precision Signal Chain
        1. 9.3.3.1 Temperature Stability
        2. 9.3.3.2 Lifetime and Environmental Stability
      4. 9.3.4 Internal Reference Voltage
      5. 9.3.5 Current-Sensing Measurable Ranges
      6. 9.3.6 Overcurrent Detection
        1. 9.3.6.1 Setting The User Configurable Overcurrent Threshold
          1. 9.3.6.1.1 Setting Overcurrent Threshold Using Power Supply Voltage
          2. 9.3.6.1.2 Setting Overcurrent Threshold Using Internal Reference Voltage
          3. 9.3.6.1.3 Setting Overcurrent Threshold Example
        2. 9.3.6.2 Overcurrent Output Response
      7. 9.3.7 Sensor Diagnostics
        1. 9.3.7.1 Thermal Alert
        2. 9.3.7.2 Sensor Alert
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power-Down Behavior
  11. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Total Error Calculation Examples
        1. 10.1.1.1 Room-Temperature Error Calculations
        2. 10.1.1.2 Full-Temperature Range Error Calculations
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curve
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Nomenclature
    2. 11.2 Device Support
      1. 11.2.1 Development Support
    3. 11.3 Documentation Support
      1. 11.3.1 Related Documentation
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Support Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Mechanical Data
    2.     PACKAGING INFORMATION
    3. 13.2 Tape and Reel Information

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DVF|10
Thermal pad, mechanical data (Package|Pins)

10.1.1.1 Room-Temperature Error Calculations

For room-temperature total error calculations, specifications across temperature and drift are ignored. As an example, consider a TMCS1143B5A with a supply voltage (VS) of 5.25V and a worst-case common-mode excursion of 600V to calculate operating-point-specific parameters. Consider a measurement error due to an external 400µT magnetic field generated by a 20ADC current flowing through an adjacent trace or conductor that is 10mm away. The full-scale linear current measurement range of this device is greater than ±50A, as shown in the Device Comparison table. In this case, the calculating error at both 50A and 25A highlights error dependencies on the input-current level. Table 10-1 shows the individual error components and RSS maximum total error calculations at room temperature under the conditions specified. Relative to other errors, the additional errors from CMRR, external ambient magnetic fields BEXT and nonlinearity are negligible, and can typically be excluded from total error calculations.

Table 10-1 Total Error Calculation: Room Temperature Example
ERROR COMPONENT SYMBOL EQUATION

ERROR AT

IIN = 50A

ERROR AT

IIN = 25A
Input offset error eIos e I o s = I O S I I N × 100 % = V O E S × I I N × 100 % = ±   1.5 m V 25 m V / A × I I N × 100 % ±0.12% ±0.24%
PSRR error ePSRR e P S R R =   P S R R × V S - 5 I I N × 100 % ±0.04% ±0.08%
CMRR error eCMRR e C M R R =   C M R R × V C M I I N × 100 % ±0.01% ±0.02%
External Field error eBext e B e x t = B E X T × C M F R I I N × 100 % ±0.01% ±0.02%
Sensitivity error eS Specified in Electrical Characteristics ±0.5% ±0.5%
Nonlinearity error eNL Specified in Electrical Characteristics ±0.1% ±0.1%
RSS total error eRSS e R S S = e I o s + e P S R R + e C M R R 2 + e B e x t 2 + e S 2 + e N L 2 0.54% 0.61%