Recomendations for single rail op-amp with fast slew rate?

[Lostgallifreyan]

Hello, I'll keep this one short.
I like the CA3140 but can't find a working spice model for single rail
voltage follower operation so it won't let me model some of the weird things
I found that chip useful for. It's still made, and I'll ask Intersil if they
can give me a model, but it might be time to look for something widely used,
multi-sourced, capable of the same things a CA3140 can do. I don't mind if
has no strobe though.

Any specific IC's I should look at? (Googling CA3140 substitutes is like
asking monkeys instead of experts, so I have to ask here too, because Google
is like a lucky dip with lousy prizes, at times. I find comparisons with
obsolete IC's, or with the 741 (!) or with abysmal slew rates...) So I need
to ask people who have a clue about this.

 

[Michael A. Terrell]

Lostgallifreyan wrote:

Hello, I'll keep this one short.
I like the CA3140 but can't find a working spice model for single rail
voltage follower operation so it won't let me model some of the weird things
I found that chip useful for. It's still made, and I'll ask Intersil if they
can give me a model, but it might be time to look for something widely used,
multi-sourced, capable of the same things a CA3140 can do. I don't mind if
has no strobe though.

Any specific IC's I should look at? (Googling CA3140 substitutes is like
asking monkeys instead of experts, so I have to ask here too, because Google
is like a lucky dip with lousy prizes, at times. I find comparisons with
obsolete IC's, or with the 741 (!) or with abysmal slew rates...) So I need
to ask people who have a clue about this.

How about their CA3240?


--
You can't have a sense of humor, if you have no sense!

 

[Lostgallifreyan]

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:4A73B509.241D8D1B@earthlink.net:

How about their CA3240?

Actually that's the one I want replacing. (And the lack of spice models to
model what I want modelling still applies..)

So far I settled for Linear Technology's LT1215. Not BiMOS, I think, but
input resistance still usefully high, and it's not multisourced, and it's
three times the cost of a CA3140, but it looks like being better than I
thought I'd get for the things I want to use it for, so I might settle there.
But if anyone has other suggestions, taking into account this post, go for
it.