SBASA35A June   2020  – October 2020 AMC3330-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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
    10. 6.10 Switching Characteristics
    11. 6.11 Timing Diagram
    12. 6.12 Insulation Characteristics Curves
    13. 6.13 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Input
      2. 7.3.2 Isolation Channel Signal Transmission
      3. 7.3.3 Analog Output
      4. 7.3.4 Isolated DC/DC Converter
      5. 7.3.5 Diagnostic Output and Fail-Safe Behavior
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Filter Design
        2. 8.2.2.2 Differential to Single-Ended Output Conversion
      3. 8.2.3 Application Curve
    3. 8.3 What to Do and What Not to Do
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.2 Detailed Design Procedure

Use Ohm's Law to calculate the minimum total resistance of the resistive divider to limit the cross current to the desired value ( RTOTAL = VLx / ICROSS) and the required sense resistor value to be connected to the AMC3330-Q1 input: RSNS = VFSR / ICROSS.

Consider the following two restrictions to choose the proper value of the sense resistor RSNS:

  • The voltage drop on RSNS caused by the nominal voltage range of the system must not exceed the recommended input voltage range: VSNS ≤ VFSR
  • The voltage drop on RSNS caused by the maximum allowed system overvoltage must not exceed the input voltage that causes a clipping output: VSNS ≤ VClipping

Table 8-2 lists examples of nominal E96-series (1% accuracy) resistor values for systems using 120-V and
230-V AC line voltages.

Table 8-2 Resistor Value Examples
PARAMETER 120-VRMS LINE VOLTAGE 120-VRMS LINE VOLTAGE 230-VRMS LINE VOLTAGE
Peak voltage 170 V 170 V 325 V
Resistive divider resistors RL11, RL12 845 kΩ 845 kΩ 1.62 MΩ
Sense resistor RSNS 10 kΩ 10 kΩ 10 kΩ
Current through resistive divider ICROSS 100 µA 100 µA 100 µA
Resulting voltage drop on sense resistor VSNS 1.00 V 1.00 V 1.00 V