SLLSFA0C July   2019  – May 2024 ISO7021

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
    1.     Pin 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 5V Supply
    10. 6.10 Supply Current Characteristics 5V Supply
    11. 6.11 Electrical Characteristics 3.3V Supply
    12. 6.12 Supply Current Characteristics 3.3V Supply
    13. 6.13 Electrical Characteristics 2.5V Supply
    14. 6.14 Supply Current Characteristics 2.5V Supply
    15. 6.15 Electrical Characteristics 1.8V Supply
    16. 6.16 Supply Current Characteristics 1.8V Supply
    17. 6.17 Switching Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Refresh
      2. 8.3.2 Electromagnetic Compatibility (EMC) Considerations
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device I/O Schematics
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Insulation Lifetime
      2. 9.1.2 Intrinsic Safety
        1. 9.1.2.1 Schedule of Limitations
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 PCB Material
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

3 Description

The ISO7021 device is an ultra-low power, multichannel digital isolator that can be used to isolate CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by a double capacitive silicon dioxide (SiO2) insulation barrier. Innovative edge based architecture combined with an ON-OFF keying modulation scheme allows these isolators to consume very-low power while meeting 3000VRMS isolation rating per UL1577. The per channel dynamic current consumption of the device is under 120μA/Mbps and the per channel static current consumption is 4.8μA at 3.3V, allowing for use of the ISO7021 in both power and thermal constrained system designs.

The device can operate as low as 1.71V, as high as 5.5V , and is fully functional with different supply voltages on each side of isolation barrier. The two-channel isolator comes in a narrow body 8-SOIC package with one forward and one reverse-direction channel in a 8-SOIC package. The device has default output high and low options. If the input power or signal is lost, default output is high for the ISO7021 device without the suffix F and low for the ISO7021F device with the F suffix. See the Device Functional Modes section for more information.

Device Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
ISO7021 SOIC (8-D) 4.90mm × 6.00mm
(1) For more information, see Section 14.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
ISO7021 Data Rate vs Power Consumption at 3.3V Data Rate vs Power Consumption at 3.3V