hi all
Im trying to source an Op-amp to design a buffer its for the circuit that I have attached a screenshot off, I just did a quick simulation to test it first but it sure what op-amp to choose any help would be appreciated
Kind Regards
J
Basically the circuit is a potential divider and then buffered into differential amplifiers sorry about the different stages

 

Opamp choice would depend on various factors, e.g. common mode input range required, gain-bandwidth minimum, supply current, input offset ......

 

1. Range of input signal match range of the op amp. You don't want to feed 0-10volt signal into 0-5 volt op amp.
2. Available power supplies. Some op amps need two power supplies. Some op amps need only one. Some designers would buy extra power supply, some would not.

 

1. Range of input signal match range of the op amp. You don't want to feed 0-10volt signal into 0-5 volt op amp.
2. Available power supplies. Some op amps need two power supplies. Some op amps need only one. Some designers would buy extra power supply, some would not.

Hi basically all input signals are 0.5v to 3v to power op-amps:5V

 

Sorry I meant power of +/-5v available

 

Opamp choice would depend on various factors, e.g. common mode input range required, gain-bandwidth minimum, supply current, input offset ......

All I want is an opamp that takes in a voltage between 0.5 to 3v gives out the same as the input and could be powered from +/-5v

 

Any suggestions would be appreciated

 

Still need maximum signal frequency, and accuracy required.

 

Still need maximum signal frequency, and accuracy required.

The signal will have a low frequency essentially what I'm doing it taking voltages from Cells and trying to measure the difference between cells to ensure they are the same so reducing the voltage using potential dividers and then differential amplifiers to monitor the difference but need buffers between these two stages

 

LM324 quad opamp is cheap and adequate.

 

And the LM324 only requires a single positive power supply to buffer +0.5-3V voltages.

 

And the LM324 only requires a single positive power supply to buffer +0.5-3V voltages.

do I need to add any resistors I have seen designs like that to the op-amp or just a connection from negative input to output?

 

do I need to add any resistors I have seen designs like that to the op-amp or just a connection from negative input to output?

use punctuation.

 

You don't need to add resistors (unless input bias current has no other path).

 

The LM324 is reliable and nearly indestructible, but it also is not super accurate. The input offset voltage can exceed 10 mV. Since all of the stages in your schematic have gain at DC and do not have matched input impedances, that 10 mV might affect the useful accuracy of your outputs. Something to consider.

ak

 

Thank you all for the advice it has been really useful

 

use punctuation.

Please use capitalization and complete sentences if you are going to nitpick.
Thanks for using a period though.

 

Please use capitalization and complete sentences if you are going to nitpick.
Thanks for using a period though.

u r welcome.