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Common Customer Problem: Op-Amp Output Voltage Swing

Common Customer Problem: Op-Amp Output Voltage Swing. By Marek Lis Sr Application Engineer Texas Instruments -Tucson. Op Amp Output Range Consideration. REAL WORLD Outputs. Classic Output Stage. Common-emitter output Current source driver Headroom set by V BE +V CESAT Unity Gain.

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Common Customer Problem: Op-Amp Output Voltage Swing

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  1. Common Customer Problem: Op-Amp Output Voltage Swing By Marek Lis Sr Application Engineer Texas Instruments -Tucson

  2. Op Amp Output Range Consideration

  3. REAL WORLD Outputs

  4. Classic Output Stage • Common-emitter output • Current source driver • Headroom set by VBE+VCESAT • Unity Gain

  5. OPA827 – Classic Output OPA827 OPA827

  6. R-to-R Output Stage • Common Collector or Common Drain • Headroom set by VDSsat or VCEsat

  7. R-to-R Output Stage • Common Collector or Common Drain • Headroom set by VCESAT • Value of RLOAD affects AOL and Output Swing

  8. MOSFET Characteristic Curves

  9. Achieving Output Swing to the Negative Rail

  10. SS Pull Down Cheat Sheet

  11. Thank you Marek Lis lis_marek@ti.com

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