SBOSAF3 November   2023 TMCS1126

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 Insulation Specifications
    6. 6.6 Electrical Characteristics
  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 External Magnetic Field Errors
    2. 7.2 Transient Response Parameters
      1. 7.2.1 CMTI, Common-Mode Transient Immunity
    3. 7.3 Safe Operating Area
      1. 7.3.1 Continuous DC or Sinusoidal AC Current
  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 Ambient Field Rejection
      4. 8.3.4 High-Precision Signal Chain
        1. 8.3.4.1 Temperature Stability
        2. 8.3.4.2 Lifetime and Environmental Stability
      5. 8.3.5 Internal Reference Voltage
      6. 8.3.6 Current-Sensing Measurable Ranges
      7. 8.3.7 Overcurrent Detection
    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
    1. 12.1 Package Option Addendum
    2. 12.2 Tape and Reel Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • DVG|10
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.3.6 Current-Sensing Measurable Ranges

The zero current reference voltage, VREF, along with device sensitivity, S, and supply voltage, VS, determine the linear input current measurement range of the device as listed in the Device ComparisonDevice ComparisonDevice Comparison table. The maximum linear output voltage, VOUT,max, is limited by the exceptional near-to-supply output voltage swing, SwingVS, of the TMCS1126 as defined in the Electrical CharacteristicsElectrical CharacteristicsElectrical CharacteristicsElectrical CharacteristicsElectrical Characteristics table and shown in Equation 16.

Equation 16. VOUT,max=VS-SwingVS

The minimum linear output voltage, VOUT,min, is limited by the exceptional near-to-ground linear output swing, SwingGND, as is also defined in the Electrical CharacteristicsElectrical CharacteristicsElectrical CharacteristicsElectrical CharacteristicsElectrical Characteristics table and shown in Equation 17.

Equation 17. VOUT,min=SwingGND

Overall maximum dynamic range can be optimized with proper device selection by referring minimum and maximum linear output voltage swing to minimum and maximum linear input current range by dividing output voltage by sensitivity, S (see Equation 18 and Equation 19).

Equation 18. I I N ,   m a x + = V O U T , m a x - V O U T , 0 A S
Equation 19. I I N ,   m a x - = V O U T , 0 A - V O U T , m i n S

where

  • IIN,max+ is the maximum linear measurable positive input current.
  • IIN,max– is the maximum linear measurable negative input current.
  • S is the sensitivity of the device variant.
  • VOUT,0A is the appropriate zero current output voltage.

As an example for determining linear input current measurement range, consider the TMCS1126A2A, TMCS1126B2A and TMCS1126C2A, all with 50 mV/A sensitivity as shown in the Device ComparisonDevice ComparisonDevice Comparison table. When used with a 5V supply, the TMCS1126A2A has a balanced ±48A bidirectional linear current measurement range about the 2.5V zero current output reference voltage, VREF, as shown in Figure 8-1. When used with a 3.3V supply, the TMCS1126B2A has a balanced ±31A bidirectional linear current measurement range about the 1.65V zero current output reference voltage. If used with a 5V supply, the linear current measurement range of the TMCS1126B2A can be extended from –31 A to +65 A as shown in Figure 8-1. The TMCS1126C2A with a 0.33V zero current reference voltage is intended for measuring unidirectional currents. When used with a 3.3V supply the TMCS1126C2A has a unidirectional linear current measurement range from –5 A to +57 A which can be extended from –5 A to +91.4 A when used with a 5V supply.

GUID-20230509-SS0I-52VB-QN5S-G6ZGJTCK2BBT-low.svg Figure 8-1 Output Voltage Relationship to Input Current for TMCS1126x2A