Is ST LM358N a rail to rail opamp? If it is not, can I use LM358N to replace OPA2277 due lower costs?

[Uwe Bonnes]

You have to carefully compare your requirements and the specs. If some design uses an OPA2277, there are probably reason this part was used,

[Nsacc.1]

Ok, understood. But in the opposite side, the OPA2277 would be an upgrade for the LM358N once its specs are similar, and OPA is a premium line?

Tks again.

[Nsacc.1]

And I cannot confirm if the LM358N is a rail to rail opamp or not...

[Uwe Bonnes]

There probably will be things that the LM358N can do that the OPA2277 can not or is not speced for.

[Nsacc.1]

Tks Uwe!

Just to check and compare well, would you let me know if the LM358N is a rail to rail voltage opamp?

Tks!

[Uwe Bonnes]

Read the datasheet carefully yourself. What properities do you expect from a RRIO amplifiers. Do you find specs that fullfill these requirements?

[Ozone]

Reading datasheets is an essential skill.

> Is ST LM358N a rail to rail opamp?

No, it is not.

The datashett doesn't say it.

Output voltage swing is supply voltage minus1.5V, which does not qualify as "rail-to-rail".

[AIM65]

OPA2777 is a précision Opamp, low drift, high gain, low bias, low input offset and it's not rail to rail output nor input. But it has altmost nothing in common with the venerable LM358. It's likely there's a good reason to have choosen such a precision opamp, so do not replace it with LM358.

[Nsacc.1]

Dear AIM65, tks for your reply.

In other side, do you think can I replace the LM358 by an OPA2277? Has the OPA advantages over LM due it is a precision Opamp and LM is not? Looking for the both datasheet, I found that both are low power and its mechanical and electrical parameters are similar. Tks