SBOA362A December   2019  – October 2026 REF34 , REF34-Q1 , REF3425-EP , REF3430-EP , REF3433-EP , REF3440-EP , REF4132-Q1 , REF50 , REF5020-EP , REF5020A-Q1 , REF5025-EP , REF5025-HT , REF5025A-Q1 , REF5030A-Q1 , REF5040-EP , REF5040A-Q1 , REF5045A-Q1 , REF5050-EP , REF5050A-Q1 , REF50E , REF70

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Voltage Reference Architecture
    1. 2.1 Shunt or Series Reference
    2. 2.2 Choosing the Best System Reference
  6. 3Key Specifications for Voltage Reference
    1. 3.1 Temperature Coefficient
    2. 3.2 Initial Accuracy
    3. 3.3 0.1–10 Hz Peak-to-peak Noise
    4. 3.4 Thermal Hysteresis and Long-term Stability
    5. 3.5 Load and Line Regulation
  7. 4Method of Negative Output Design and Noise Analysis
    1. 4.1 Voltage Inverting by Level Shift using REF5025 and OPA192
    2. 4.2 Using a Buffer to Generate Negative Reference Output
    3. 4.3 A Way to Minimize the Noise
  8. 5Conclusion
  9. 6References
  10. 7Revision History
Application Note

Low-Noise Negative Reference Design with REF5025