SNOAA35E December   2023  – June 2024 LM2901 , LM2901B , LM2901B-Q1 , LM2903 , LM2903-Q1 , LM2903B , LM2903B-Q1 , LM339 , LM339-N , LM393 , LM393-N , LM393B , LM397 , TL331 , TL331-Q1 , TL331B

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Devices Covered in Application Note
    1. 1.1 Base Part Numbers
    2. 1.2 Input Voltage Offset Grades
    3. 1.3 Maximum Supply Voltage
    4. 1.4 High Reliability Options
  5. 2 The New TL331B, TL391B, LM339B, LM393B, LM2901B and LM2903B B Versions
  6. 3 PCN's to Change Classic Die to a New Die Design
    1. 3.1 PCN #1 for Single and Dual (TL331 and LMx93/LM2903)
    2. 3.2 PCN #2 for Single and Dual (TL331 and LMx93/LM2903)
    3. 3.3 PCN For Quad (LMx39/LM2901)
    4. 3.4 Device PCN Summary
    5. 3.5 Determining Die Version Used
      1. 3.5.1 Determine Die Used for Single TL331 and Dual LM293, LM393, and LM2903 - PCN #1 (Ji3)
      2. 3.5.2 Determine Die Used for Single TL331 and Dual LM293, LM393, and LM2903 - PCN #2 (TiB)
      3. 3.5.3 Determine Die Used for Quad LM139, LM239, LM339, and LM2901
  7. 4 Changes to Package Top Markings
  8. 5 Input Considerations
    1. 5.1  Input Stage Schematic – The Classic LM339 Family
    2. 5.2  Input Stage Schematic - New B and TiB Devices
    3. 5.3  Differences Between the Classic, B and Tib Die Devices
    4. 5.4  Input Voltage Range
    5. 5.5  Input Voltage Range vs. Common Mode Voltage Range
    6. 5.6  Reason for Input Range Headroom Limitation
    7. 5.7  Input Voltage Range Feature
    8. 5.8  Both Inputs Above Input Range Behavior
    9. 5.9  Negative Input Voltages
      1. 5.9.1 Maximum Input Current
      2. 5.9.2 Phase Reversal or Inversion
      3. 5.9.3 Protecting Inputs from Negative Voltages
        1. 5.9.3.1 Simple Resistor and Diode Clamp
        2. 5.9.3.2 Voltage Divider with Clamp
          1. 5.9.3.2.1 Split Voltage Divider with Clamp
    10. 5.10 Power-Up Behavior
    11. 5.11 Capacitors and Hysteresis
    12. 5.12 Output to Input Cross-Talk
  9. 6 Output Stage Considerations
    1. 6.1 Output VOL and IOL
    2. 6.2 Pull-Up Resistor Selection
    3. 6.3 Short Circuit Sinking Current
    4. 6.4 Pulling Output Up Above Vcc
    5. 6.5 Negative Voltages Applied to Output
    6. 6.6 Adding Large Filter Capacitors To Output
  10. 7 Power Supply Considerations
    1. 7.1 Supply Bypassing
      1. 7.1.1 Low VCC Guidance
      2. 7.1.2 Split Supply use
  11. 8 General Comparator Usage
    1. 8.1 Unused Comparator Connections
      1. 8.1.1 Do Not Connect Inputs Directly to Ground
      2. 8.1.2 Unused Comparator Input Connections
      3. 8.1.3 Leave Outputs Floating
      4. 8.1.4 Prototyping
  12. 9 PSpice and TINA TI Models
  13. 10Conclusion
  14. 11Related Documentation
    1. 11.1 Related Links
  15. 12Revision History

9 PSpice and TINA TI Models

PSpice models are available for both the classic and new B devices. The models are located in the respective product folders below the Design & Development -> Design tools & simulation tab. The core model is the same for the TINA and PSpice model.

The models model typical behavior at room temperature, and since most of the family have similar typical at room, the model can be used for any device in the family.

There is an older, simple transistor-level model for the classic devices, and a newer model for the B devices.

Note: The newer B model has a feature that forces the output to one-half of the comparator supply voltage (Vcc/2), regardless of pull-up voltage, when the input range or supply range is violated. This is purposely designed to alert the user that there is a problem. The actual device does not do this and reacts as described in the previous sections. The B model does not model the one input within range functionality, and instead, forces the Vcc/2 output error if either input range is violated.