SLLS867K September   2007  – October 2015 ISO7230C , ISO7230M , ISO7231C , ISO7231M

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  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  Electrical Characteristics: VCC1 and VCC2 at 5-V
    6. 7.6  Electrical Characteristics: VCC1 at 5-V, VCC2 at 3.3-V
    7. 7.7  Electrical Characteristics: VCC1 at 3.3-V, VCC2 at 5-V
    8. 7.8  Electrical Characteristics: VCC1 and VCC2 at 3.3 V
    9. 7.9  Power Dissipation Characteristics
    10. 7.10 Switching Characteristics: VCC1 and VCC2 at 5-V
    11. 7.11 Switching Characteristics: VCC1 at 5-V, VCC2 at 3.3-V
    12. 7.12 Switching Characteristics: VCC1 at 3.3-V and VCC2 at 5-V
    13. 7.13 Switching Characteristics: VCC1 and VCC2 at 3.3-V
    14. 7.14 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 Package Insulation and Safety-Related Specifications
      2. 9.3.2 Insulation Characteristics
      3. 9.3.3 Regulatory Information
      4. 9.3.4 Safety Limiting Values
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    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
      1. 12.1.1 PCB Material
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Documentation
    2. 13.2 Related Links
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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発注情報

10 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

10.1 Application Information

ISO723x utilize single-ended TTL or CMOS-logic switching technologies. The supply voltage range is from 3.15 V to 5.5 V for both supplies, VCC1 and VCC2. When designing with digital isolators, it is important to keep in mind that due to the single-ended design structure, digital isolators do not conform to any specific interface standard and are only intended for isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed between the data controller (that is, μC or UART), and a data converter or a line transceiver, regardless of the interface type or standard.

10.2 Typical Application

ISO7231 combined with Texas Instruments' mixed signal micro-controller, RS-485 transceiver, transformer driver, and voltage regulator can create an isolated RS-485 system as shown in Figure 16.

ISO7230C ISO7230M ISO7231C ISO7231M typical_app_slls867.gif Figure 16. Isolated RS-485 Application Circuit

10.2.1 Design Requirements

Unlike optocouplers, which need external components to improve performance, provide bias, or limit current, ISO723x only needs two external bypass capacitors to operate.

10.2.2 Detailed Design Procedure

ISO7230C ISO7230M ISO7231C ISO7231M ISO7230_slls867.gif Figure 17. Typical ISO7230 Circuit Hook-up
ISO7230C ISO7230M ISO7231C ISO7231M ISO7231_slls867.gif Figure 18. Typical ISO7231 Circuit Hook-up

10.2.3 Application Curve

ISO7230C ISO7230M ISO7231C ISO7231M bkdwn_tst_lls867.gif Figure 19. Time Dependant Dielectric Breakdown Testing Results