SBAS941A May   2019  – November 2019 AMC1035-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Application Example
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1      Absolute Maximum Ratings
    2. 6.2      ESD Ratings Automotive
    3. Table 1. Recommended Operating Conditions
    4. 6.3      Thermal Information
    5. 6.4      Electrical Characteristics
    6. 6.5      Switching Characteristics
    7. 6.6      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 Modulator
      3. 7.3.3 Reference Output
      4. 7.3.4 Clock Input
      5. 7.3.5 Digital Output
      6. 7.3.6 Manchester Coding Feature
    4. 7.4 Device Functional Modes
      1. 7.4.1 Output Behavior in Case of a Full-Scale Input
      2. 7.4.2 Fail-Safe Output
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Digital Filter Usage
    2. 8.2 Typical Applications
      1. 8.2.1 Voltage Sensing
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 IGBT Temperature Sensing
      3. 8.2.3 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 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

7.3.3 Reference Output

The AMC1035-Q1 offers a voltage reference output that can source or sink current to significantly reduce the gain error thermal drift in ratiometric applications as specified in the Electrical Characteristics table. The IGBT Temperature Sensing section provides an example of a ratiometric use case for the AMC1035-Q1.

The reference output can drive capacitive loads less than 1 nF. Use a series resistor to avoid oscillations and degradation of performance for capacitive loads ≥ 1 nF. Table 2 lists the recommended series resistor values for given capacitor value examples. Interpolate for capacitive loads with a value between the given examples.

Table 2. Series Resistor Value for Capacitive Loads ≥ 1 nF on the REFOUT Pin

CAPACITIVE LOAD ON THE REFOUT PIN RECOMMENDED SERIES RESISTOR
1 nF 33 Ω
3.3 nF 56 Ω
10 nF 47 Ω
33 nF 33 Ω
100 nF 15 Ω
330 nF 10 Ω
1 μF 5.6 Ω
3.3 μF 3.3 Ω
10 μF 1.8 Ω