SBAS897C March   2018  – June 2022 AMC1311-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. 7.4 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 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

7.3.3 Analog Output

The AMC1311-Q1 provides a differential analog output on the OUTP and OUTN pins. For input voltages of VIN in the range from –0.1 V to +2 V, the device provides a linear response with a nominal gain of 1. For example, for an input voltage of 2 V, the differential output voltage (VOUTP – VOUTN) is 2 V. At zero input (IN shorted to GND1), both pins output the same common-mode output voltage VCMout, as specified in the Section 6.9 table. For input voltages greater than 2 V but less than approximately 2.5 V, the differential output voltage continues to increase but with reduced linearity performance. The outputs saturate at a differential output voltage of VCLIPout, as shown in Figure 7-2, if the input voltage exceeds the VClipping value.

Figure 7-2 Output Behavior of the AMC1311-Q1

The AMC1311-Q1 output offers a fail-safe feature that simplifies diagnostics on a system level. Figure 7-2 shows the fail-safe mode, in which the AMC1311-Q1 outputs a negative differential output voltage that does not occur under normal operating conditions. The fail-safe output is active in three cases:

  • When the high-side supply VDD1 of the AMC1311-Q1 device is missing
  • When the high-side supply VDD1 falls below the undervoltage threshold VDD1UV
  • When the SHTDN pin is pulled high

Use the maximum VFail-safe voltage specified in the Section 6.9 table as a reference value for fail-safe detection on a system level.