SLLSF54D October   2017  – March 2020 ISO7041

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Application Schematic
      2.      Data Rate vs Power Consumption at 3.3 V
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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  Insulation Specifications
    7. 7.7  Safety-Related Certifications
    8. 7.8  Safety Limiting Values
    9. 7.9  Electrical Characteristics 5V Supply
    10. 7.10 Supply Current Characteristics 5V Supply
    11. 7.11 Electrical Characteristics 3.3V Supply
    12. 7.12 Supply Current Characteristics 3.3V Supply
    13. 7.13 Electrical Characteristics 2.5V Supply
    14. 7.14 Supply Current Characteristics 2.5V Supply
    15. 7.15 Electrical Characteristics 1.8V Supply
    16. 7.16 Supply Current Characteristics 1.8V Supply
    17. 7.17 Switching Characteristics
    18. 7.18 Insulation Characteristics Curves
    19. 7.19 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Refresh Enable
      2. 9.3.2 Electromagnetic Compatibility (EMC) Considerations
    4. 9.4 Device Functional Modes
      1. 9.4.1 Device I/O Schematics
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Insulation Lifetime
      2. 10.1.2 Intrinsic Safety
        1. 10.1.2.1 Schedule of Limitations
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 PCB Material
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Community Resource
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

9.3.1 Refresh Enable

The ISO7041 uses an edge based encoding scheme to transfer an input signal change across the isolation barrier versus sending across the DC state. Enabling the refresh feature consistently validates that the DC output state of each isolator channel matches the DC input state. An internal watchdog timer monitors for activity on the individual inputs and transmits the logic state when there is no input signal transition for more than 100 µs. This ensures that the input and output state of the isolator always match. Tie both EN1 and EN2 to their respective grounds to enable refresh.

Disable refresh by tying both EN1 and EN2 to their respective VCC power supplies. Disabling refresh will further decrease the power consumption of the device but the DC state is not guaranteed at startup. System level solutions can be implemented to ensure the isolator channel output matches the input at startup. For example, at start up, an immediate full transition of the input signals from high to low and low to high on the individual isolator lines would allow the states of the outputs to properly track the inputs.