OPA604 alternative? (Pumbaa)

[deft]

Got most of the way through building a Pumbaa board then realised how difficult OPA604s seem to be to get hold of (at least in the UK)

Would anything easier to find make a suitable alternative? Cheers!

 

[jimilee]

Is that just a single opamp, like a TL071?

 

[swyse]

If the board is the actual production one I'm confused about the traces we can see on pins 1 and 8 going to c6, seeing as the OPA604 has no connection to pin 8 whatsoever according to the datasheet. I assume it's got a cap like a RAT would for compensation but then no connection for it on that IC. I'd personally go for a LF356 as my first try for a replacement due to the fet input, plenty of slew rate, and no connection to pin 8 like the opa604.

 

[deft]

Picture above does seem to match the actual board if that helps

 

[seangarland123]

Got most of the way through building a Pumbaa board then realised how difficult OPA604s seem to be to get hold of (at least in the UK)

Would anything easier to find make a suitable alternative? Cheers!

I’m about to build the Pumbaa as well, and from what I can find, looks like the OPA604 is discontinued.

What did you end up going with?