SBOA367B December   2019  – June 2022 TLV9001 , TLV9002 , TLV9004 , TLV9051 , TLV9052 , TLV9054 , TLV9061 , TLV9062 , TLV9064

 

  1.   Designing for TLV90xxS operational amplifiers with shutdown
  2.   Trademarks
  3. 1 Introduction
  4. 2 Shutdown Specifications
  5. 3  SHDN Pin Limits and Connections
  6. 4 Output Behavior During Enable and Shutdown
  7. 5 Enable Time and Shutdown Time Factors
    1. 5.1 Quiescent Current
    2. 5.2 Temperature
    3. 5.3 Load
    4. 5.4 Feedback Path
  8. 6 Impact on Commonly Used Circuit Configurations
    1. 6.1 Inverting Amplifier Circuit
    2.     14
    3. 6.2 Non-Inverting Amplifier Circuit
    4.     16
    5. 6.3 Buffer Circuit
    6.     18
  9. 7 Advanced Circuit Functionality Using Amplifiers With Shutdown
  10. 8 Conclusion
  11. 9 References
  12. 10Revision History

6.2 Non-Inverting Amplifier Circuit

Figure 6-3 displays a non-inverting amplifier circuit configuration and its equivalent model when the amplifier is placed in the shutdown mode. In contrast to the inverting configurations, disabling the amplifier in a non-inverting configuration ensures there is no resistive path for the input signal to reach the output node. Thus, only a smaller portion of the input signal will appear on the output when the amplifier is disabled. It is important to remember that the amplifier does have a differential input capacitance (CID) that connects the input pins and provides a path for some signal to reach the output, especially at higher frequencies.