saint gillis
Well-known member
Any thoughts / experience to share about the 321 operational amplifier (LMV321 / LM321) :
https://www.st.com/resource/en/datasheet/lmv321l.pdf
?
https://www.st.com/resource/en/datasheet/lmv321l.pdf
?
saint gillis said:But I'm more worried about possible unexpected behavior because it's a more recent chip...
In fact I'll not make battery powered effects...
saint gillis said:If thought of it if I need a single op amp for a rail splitter in 9V guitar effects... less pins, small size, small power consumption...
saint gillis said:Supply current per channel :
TL06x : 200µA
LMV321 : 120µA
saint gillis said:Current consumption is not my issue here
saint gillis said:It is not my MAIN concern, my main concern is size and cost.
But it is still something to consider, and 500µA is still small current anyway !
So the TS321 is smaller than classic 8-pins op amps, in terms of sound is there any reason it might be worse than a TL061 or any other classic op amp when used as a rail splitter?
Maybe I should have called this thread "importance of a rail splitter op amp in terms of sound and noise" , but that's how it works, ideas and concerns get more precise when we discuss.
saint gillis said:Not many , I guess 1mA would be a big max
squarewave said:I don't think you should commit yourself to a particular op amp for a wide variety of things. The circuit necessitates different capabilities. FET amps are better for conventional circuits that need low offset. Bi-poloar amps are better for low frequency noise. If you're replacing something in an existing circuit you might not be able to use a really fast amp because it could be unstable. Sometimes you want something with a lot of drive. Sometimes you want something that has low quiescent current. There are op amps that do a lot of things well but they tend to be more expensive (not like I care about the price for one-off designs but I just feel a little foolish using an OPA2132 for $10 in a side-chain rectifier circuit that doesn't even pass audio when a TL082 would work just great). You are inevitably going to have to use a variety of different amps for various reasons. I have boxes of connectors and pots and crap that I once decided I was going to standardize on and then I decided I was going to standardize on a different type of connector and then another and so on. Now I try not to buy anything I don't actually need immediately.
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