So I am using an LM741/A Op-Amp. Wondering whats the value of its Vsat? Have been looking at its datasheets but cannot find anything. Am I missing something? Is the Vsat just equal to its output voltage swing?


This data sheet says

LM 741, +-15V supply, Output voltage swing : ±12(MIN) ±14 (TYP) for 10k ohm load


LM 741 (A), +-20V supply, Output voltage swing : ±16(MIN) for 10k ohm load

Ti website also says "Rail-to-rail : No"

  • \$\begingroup\$ electronics.stackexchange.com/a/304522/238590 \$\endgroup\$ – AJN Jul 9 '20 at 6:48
  • \$\begingroup\$ Ok so for a 2Kohm load, the Typical output voltage swing is 13V, and the minimum is 10V with a 15V power supply.LM371's maximum supply voltage is 22V. Let's say I have another op-amp that has a typical output voltage swing for a 2Kohm as well of 12V and a minimum output swing of 10V with a 15V power supply. This other op-amp has a max supply votage of 18V. Which op-amp do I use if I want an undistorted Vout peak voltage of 12.5V? Any help is appreciated thanks. \$\endgroup\$ – Wetyyjs Jul 9 '20 at 6:56
  • \$\begingroup\$ From what you said, +-15V supply would not work with either opamp. When you say undistorted you might also want to specify a frequency range and choose one with larger slew rate. \$\endgroup\$ – AJN Jul 9 '20 at 7:11
  • \$\begingroup\$ Yes the Vin frequency is 50Khz and both op-amps have suitable slew rates. Just wondering which op-amp I should choose taking into account the voltage swing. Both op-amps output swing can reach over 12.5V if supply votage is 18V. So which one do I use \$\endgroup\$ – Wetyyjs Jul 9 '20 at 7:23
  • \$\begingroup\$ "... both op-amps have suitable slew rates." Can you show your calculations? Mine show that 50 kHz, 12.5 V peak means you require a slew rate of at least 12.5 V in one quarter cycle at 50 kHz so \$ slew\ rate = 12.5 \times \frac 1 4 \times \frac 1 {50k} = 62.5 \ \text{V/}\mu \text s \$. The datasheet you linked to says the 741 can do 0.5 V/μs and that's only at unity gain. I think you'll struggle. \$\endgroup\$ – Transistor Jul 9 '20 at 19:13

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