SLOA332 july   2023 LMV821-N , LMV831 , OPA2991 , OPA345 , OPA376 , OPA376-Q1 , OPA377 , OPA377-Q1 , OPA4991 , OPA991 , TL074 , TLV376 , TLV9001 , TLV9002 , TS321

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Slew Rate Definition
    1. 1.1 Virtual Ground and Slew Rate
  5. 2Bipolar Op Amp Slew Rate Example
  6. 3CMOS Op Amp Slew Rate Example
    1. 3.1 Slew Boost Example 1
    2. 3.2 Slew Boost Example 2
    3. 3.3 Slew Boost Summary
  7. 4Four Methods to Determine Boost or No Boost Using the Data Sheet
  8. 5Slew Rate Dependencies on Circuit Signal Levels and Op Amp Gain Set by Feedback Network
  9. 6How Much Output Slew Rate is Needed to Support a Sine Wave or Other Non-step Inputs
  10. 7Stability Also Plays a Role in Observed Slew Rate
  11. 8Summary
  12. 9References

Slew Boost Example 2

OPA2991 also has slew boost, but the slew boost occurs much earlier than TLV9001. Around 60 mV, the slew boost engages, starting with a lower initial slew rate. With further VID, the slew rate increases to 32 V/µs by VID = 800 mV. Figure 3-4 and Figure 3-5 show two views, logarithmic and linear scales, for the OPA2991 slew rate versus VID.

GUID-20230509-SS0I-HB40-JXL5-LZN20S7XGSZ6-low.svgFigure 3-4 OPA2991 SR Versus VID Using Logarithmic Scale
GUID-20230509-SS0I-6XW5-9LMG-SWTMGL2VCD5T-low.svgFigure 3-5 OPA2991 SR Versus VID Using Linear SR Scale