What rail-to-rail OpAmp woud you recommend if wired as voltage-follower driving a LED?

Using Arduino General Electronics
1

Hi Everybody,

I have some LM358 OpAmps for general-purpose use.
Examples:
wired as voltage-follower to sniff signal-levels.
Used as a schmitt-trigger with adjustable hysteresis

Though a LM358 is not rail-to-rail and rather slow.

So what type of OPAmp would you recommend for this use?
Can be in the 1 to 5 Euro range per piece

best regards Stefan

2

If it's just an LED (in re. topic title), does rail-to-rail or speed matter?

LTC6221 LT6221

3

not really.
In case I would like to sniff analog signals it does matter.

I looked up the LT6221 at mouser they only have S8-packages.

I should have mentioned this in the first post:
I would prefer 1/10-inch DIP-package

best regards Stefan

4

LMC662
You may run into 2023 on that one, too.

4,000 left, but get yours now --
LMC662CN/NOPB Texas Instruments | Mouser

I think those aren't 100% +rail.

5

LMC6482AIM about $0.50 each.

6

I have used TLV2462, it's very op-ampy.

7

MCP6041 comes in DIP, and is rail-to-rail, in and out. Or the dual MCP6042 gives you two opamps in the same package.

8

As you say the LM358 is not rail-rail although it IS (can be) linear down to zero.

image

Plenty to choose from here and I've tested them all. Widely available and inexpensive

9

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.