SLLSFN5B June   2023  – September 2025 ISO1228

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Ratings
    6. 5.6  Insulation Specifications
    7. 5.7  Safety-Related Certifications
    8. 5.8  Safety Limiting Values
    9. 5.9  Electrical Characteristics—DC Specification
    10. 5.10 Switching Characteristics—AC Specification
    11. 5.11 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1 Test Circuits
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Surge Protection
      2. 7.3.2  Field Side LED Indication
      3. 7.3.3  Serial and Parallel Output option
      4. 7.3.4  Cyclic Redundancy Check (CRC)
      5. 7.3.5  FAULT Indication
      6. 7.3.6  Digital Low Pass Filter
      7. 7.3.7  SPI Register Map
      8. 7.3.8  SPI Timing - Non-Daisy Chain
      9. 7.3.9  SPI Timing - Daisy Chain
      10. 7.3.10 SPI Timing - Burst Mode
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Sinking Type Digital Inputs
      2. 8.2.2 Sourcing Type Digital Inputs
      3. 8.2.3 Sink/Source Type Digital Inputs
      4. 8.2.4 Design Requirements
        1. 8.2.4.1 Detailed Design Procedure
          1. 8.2.4.1.1 Current Limit
          2. 8.2.4.1.2 Voltage Thresholds
          3. 8.2.4.1.3 Wire-Break Detection
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5.11 Typical Characteristics

The following conditions apply (unless otherwise noted) : RPAR = 13 kΩ when RILIM= 0 kΩ, RPAR = 9.76 kΩ when RILIM= 1 kΩ, RSURGE = 0 kΩ, AVCC = 24V, TA = 27 °C, VLEDx = 1.8V,

ISO1228 Input Current vs Input Voltage in Sink Mode
RILIM = 0 kΩ RTHR = 2.4 kΩ ITOT = IPAR + INx
Figure 5-1 Input Current vs Input Voltage in Sink Mode
ISO1228 Input Current vs Input Voltage in Source Mode
RILIM = 0 kΩ RTHR = 1.35 kΩ ITOT = IPAR + INx
Figure 5-3 Input Current vs Input Voltage in Source Mode
ISO1228 Input Current vs Temperature in Sink ModeFigure 5-5 Input Current vs Temperature in Sink Mode
ISO1228 Input Voltage Threshold vs Temperature in Source Mode
RTHR = 0 kΩ  
Figure 5-7 Input Voltage Threshold vs Temperature in Source Mode
ISO1228 Input Voltage Threshold vs AVCC in Sink Mode
RTHR = 0 kΩ RILIM = 0 kΩ
Figure 5-9 Input Voltage Threshold vs AVCC in Sink Mode
ISO1228 Supply Current vs Supply Voltage in Sink Mode
Figure 5-11 Supply Current vs Supply Voltage in Sink Mode
ISO1228 Input Current vs Input Voltage in Sink Mode
RILIM = 1 kΩ RTHR = 1.9 kΩ ITOT = IPAR + INx
Figure 5-2 Input Current vs Input Voltage in Sink Mode
ISO1228 Input Current vs Input Voltage in Source Mode
RILIM = 1 kΩ RTHR = 1 kΩ ITOT = IPAR + INx
Figure 5-4 Input Current vs Input Voltage in Source Mode
ISO1228 Input Voltage Threshold vs Temperature in Sink Mode
RTHR = 0 kΩ
Figure 5-6 Input Voltage Threshold vs Temperature in Sink Mode
ISO1228 Propagation delay
Parallel Mode RTHR = 0 kΩ VCC1 = 5 V
Figure 5-8 Propagation delay
ISO1228 Supply Current vs Temperature in Sink Mode
RILIM = 0 kΩ  
Figure 5-10 Supply Current vs Temperature in Sink Mode