SNOAA35D April   2023  – December 2023 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.   Application Design Guidelines for LM339, LM393, TL331 Family Comparators Including the New B-versions
  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
    1. 2.1 PCN to Change Classic Die to a New Die Design
      1. 2.1.1 Determine Die Used for Single TL331 and Dual LM293, LM393, and LM2903
      2. 2.1.2 Determine Die Used for Quad LM139, LM239, LM339, and LM2901
      3. 2.1.3 Device PCN Summary
    2. 2.2 Changes to Package Top Markings
  6. 3 Input Considerations
    1. 3.1  Input Stage Schematic – The Classic LM339 Family
    2. 3.2  Input Stage Schematic - New B Devices
    3. 3.3  Differences Between the Classic and B Die Devices
    4. 3.4  Input Voltage Range
    5. 3.5  Input Voltage Range vs. Common Mode Voltage Range
    6. 3.6  Reason for Input Range Headroom Limitation
    7. 3.7  Input Voltage Range Feature
      1. 3.7.1 Both Inputs Above Input Range Behavior
    8. 3.8  Negative Input Voltages
      1. 3.8.1 Maximum Input Current
      2. 3.8.2 Phase Reversal or Inversion
      3. 3.8.3 Protecting Inputs from Negative Voltages
        1. 3.8.3.1 Simple Resistor and Diode Clamp
        2. 3.8.3.2 Voltage Divider with Clamp
          1. 3.8.3.2.1 Split Voltage Divider with Clamp
    9. 3.9  Power-Up Behavior
    10. 3.10 Capacitors and Hysteresis
    11. 3.11 Output to Input Cross-Talk
  7. 4 Output Stage Considerations
    1. 4.1 Output VOL and IOL
    2. 4.2 Pull-Up Resistor Selection
    3. 4.3 Short Circuit Sinking Current
    4. 4.4 Pulling Output Up Above VCC
    5. 4.5 Negative Voltages Applied to Output
    6. 4.6 Adding Large Filter Capacitors To Output
  8. 5 Power Supply Considerations
    1. 5.1 Supply Bypassing
      1. 5.1.1 Low VCC Guidance
      2. 5.1.2 Split Supply use
  9. 6 General Comparator Usage
    1. 6.1 Unused Comparator Connections
      1. 6.1.1 Do Not Connect Inputs Directly to Ground
      2. 6.1.2 Unused Comparator Input Connections
      3. 6.1.3 Leave Outputs Floating
      4. 6.1.4 Prototyping
  10. 7 PSPICE and TINA TI Models
  11. 8 Conclusion
  12. 9 Related Documentation
    1. 9.1 Related Links
  13. 10Revision History

1.2 Input Voltage Offset Grades

There are also grade options for VIO (also known as Vos) tolerance. An “A” in the part number suffix will have better VIO specifications compared to the same part number without an A.

Table 1-2 Maximum Input Offset Error at 25°C for Each Base Part Number with VIO Grade Options
SingleDualQuad
Part NumberVIO Max 25°CPart NumberVIO Max 25°CPart NumberVIO Max 25°C
LM3977 mVLM1935 mVLM1395 mV
TL3315 mVLM193-MIL5 mVLM139-MIL5 mV
TL331-EP5 mVLM193-N5 mVLM139-N2 mV, 5 mV
TL331-Q15 mVLM193QML5 mVLM139-SP2 mV

TL331B

4 mV

LM193QML-SP5 mVLM139A2 mV

TL331B-Q1

4 mV

LM29037 mVLM139A-MIL2 mV

TL391B

4 mV

LM2903-N7 mVLM139AQML2 mV

TL391B-Q1

4 mVLM2903-Q12 mV, 7 mVLM139AQML-SP2 mV
LM2903V2 mV, 7 mVLM2399 mV
LM2935 mVLM239-N5 mV
LM293-EP5 mVLM239A3 mV
LM293-N5 mVLM239A-EP2.5 mV
LM293A2 mVLM239A-Q12.5 mV
LM3935 mVLM29017 mV
LM393-N5 mVLM2901-N7 mV
LM393A2 mVLM2901-Q17 mV
LM393B, LM2903B2.5 mVLM2901AV2 mV
LM2901AV-Q12 mV
LM2901EP7 mV
LM2901V7 mV
LM2901V-Q17 mV
LM330220 mV
LM3399 mV
LM339-MIL5 mV
LM339-N2 mV, 5 mV
LM339A3 mV

LM339B

5.5 mV

LM2901B

5.5 mV

LM2901B-Q1

5.5 mV