I'm new here,this is my first post.
Resently,my friend gave me several chips,OPA404,OPA4228,OPA2132,OPA2134,OPA2111,OPA2604,which have better performance?
Please,give me some ideas, thanks!!!
Resently,my friend gave me several chips,OPA404,OPA4228,OPA2132,OPA2134,OPA2111,OPA2604,which have better performance?
Please,give me some ideas, thanks!!!
You could download the datasheets and compare the specs yourself. They are all good.
The audio performance depends on the circuit you use them in. If you design the circuit specifically for each op amp, you will notice little difference, if any. If you just use any circuit and swap the op amps without adapting the circuit to it, you will notice a difference. In that case you don't have an objectively good amp, but a subjectively good one, and that makes the classification a question of your personal taste.
You can not swap the four channel op amps (404, 4228) into the boards for the two channel op amps and vice versa, so you need at least two different boards for the test.
The audio performance depends on the circuit you use them in. If you design the circuit specifically for each op amp, you will notice little difference, if any. If you just use any circuit and swap the op amps without adapting the circuit to it, you will notice a difference. In that case you don't have an objectively good amp, but a subjectively good one, and that makes the classification a question of your personal taste.
You can not swap the four channel op amps (404, 4228) into the boards for the two channel op amps and vice versa, so you need at least two different boards for the test.
OPA404 and OPA2111 both use the TI Difet process, which may possibly offer better performance out of the other FET input ones. If for moderately low source impedance though, my pick with be OPA4228, that is if you can work with a quad opamp and that the preamp has a gain > 5x.
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