SBASB14 October   2024 AMC0311S-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and 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 (D Package)
    5. 6.5  Thermal Information (DWV Package)
    6. 6.6  Power Ratings
    7. 6.7  Insulation Specifications (Basic Isolation)
    8. 6.8  Insulation Specifications (Reinforced Isolation)
    9. 6.9  Safety-Related Certifications (Basic Isolation)
    10. 6.10 Safety-Related Certifications (Reinforced Isolation)
    11. 6.11 Safety Limiting Values (D Package)
    12. 6.12 Safety Limiting Values (DWV Package)
    13. 6.13 Electrical Characteristics
    14. 6.14 Switching Characteristics
    15. 6.15 Timing Diagram
  8. 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
  9. 8 Application and Implementation
    1. 8.1 Best Design Practices
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 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
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

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発注情報

7.3.3 Analog Output

The AMC0x11S-Q1 provides a single-ended analog output voltage that is proportional to the input voltage. The output is referred to GND2 and is galvanically isolated from the input of the device. The output is designed to connect directly to the input of an ADC.

The output buffer requires a minimum headroom of 250mV for linear operation. Therefore, with REFIN shorted to GND2, the device shows non-linear behavior for input voltages near 0V. To extend the linear input range to 0V, connect a reference voltage to the REFIN pin that is ≥250mV. The voltage applied to the REFIN pin is added to the output voltage as an offset and provides headroom for the output buffer. Connect the REFIN pin to GND2 if no offset is required. The output voltage of the AMC0x11S-Q1 is equal to:

Equation 1. VOUT = VIN + VREFIN = (VINP – VSNSN) + VREFIN

Figure 7-2 shows the recommended input range of the reference voltage for linear operation. Figure 7-3 shows the input-to-output transfer characteristic of the device.

AMC0311S-Q1 AMC0211S-Q1 Recommended Reference Voltage Range for Linear Operation Figure 7-2 Recommended Reference Voltage Range for Linear Operation
AMC0311S-Q1 AMC0211S-Q1 Input to Output Transfer Curve of the AMC0x11S-Q1 Left: REFIN shorted to GND2. Right: VREFIN = 250mV Figure 7-3 Input to Output Transfer Curve of the AMC0x11S-Q1 Left: REFIN shorted to GND2. Right: VREFIN = 250mV