SBOSA72 July   2021 TMCS1108-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Power Ratings
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
      1. 7.7.1 Insulation Characteristics Curves
  8. 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 Slew Rate
      2. 8.2.2 Propagation Delay and Response Time
      3. 8.2.3 Current Overload Parameters
      4. 8.2.4 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
  9. 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 High-Precision Signal Chain
        1. 9.3.2.1 Lifetime and Environmental Stability
        2. 9.3.2.2 Frequency Response
        3. 9.3.2.3 Transient Response
      3. 9.3.3 Internal Reference Voltage
      4. 9.3.4 Current-Sensing Measurable Ranges
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power-Down Behavior
  10. 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
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Development Support
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Support Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

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 TMCS1108A1B with a supply voltage (VS) of 3.3 V and a worst-case common-mode excursion of 100 V to calculate operating-point-specific parameters. Consider a measurement error due to an external magnetic field of 30 µT, roughly the Earth's magnetic field strength. The full-scale current range of the device in specified conditions is slightly greater than 28 A; therefore, calculate error at both 25 A and 12.5 A to highlight error dependence 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 error from CMRR is negligible, and can typically be ignored for total error calculations.

Table 10-1 Total Error Calculation: Room Temperature Example
ERROR COMPONENTSYMBOLEQUATION% TOTAL ERROR AT IIN = 25 A% TOTAL ERROR AT IIN = 12.5 A
Input offset erroreIos
GUID-6C36D471-F34F-49FB-A1B4-FC14E102F284-low.gif
0.64%1.28%
PSRR error ePSRR
GUID-63FFFB3A-1C03-4D5F-A720-943B2CF48535-low.gif
0.88% 1.77%
CMRR erroreCMRR
GUID-2D2E2FFA-D608-4117-9380-DFF8F94ADDA6-low.gif
0.002%0.004%
External Field erroreBext
GUID-1EEBC7AA-A5E9-42A7-B96D-DEFFAE894101-low.gif
0.11%0.22%
Sensitivity erroreSSpecified in Electrical Characteristics1.2%1.2%
Nonlinearity erroreNLSpecified in Electrical Characteristics0.5%0.5%
RSS total erroreRSS
GUID-B7F546BF-91AC-4F03-B919-72EF9C38E99A-low.gif
2.01%3.32%