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RRIO OpAmp Recommendation?
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Bill Bowden[_2_]
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RRIO OpAmp Recommendation?
"Phil Hobbs" wrote in message
...
On 9/13/2014 1:21 PM, John Larkin wrote:
On Fri, 12 Sep 2014 22:52:21 -0400,
wrote:
On Fri, 12 Sep 2014 10:58:49 -0700, Jim Thompson
wrote:
I need a rail-to-rail I/O OpAmp, 5V Vcc is fine, slow speed setting a
current mirror.
What specs?
What would you guys in the discrete world recommend as being
well-behaved, no peculiarities, etc? (And readily available ;-)
I've been using the MicroChip MCP6294, mainly because they're cheap
but the specs matter.
That looks OK for non-critical stuff. The single MCP6291 in SOT23 is
around 40 cents in quantity. (I like singles, usually.) Somewhere
there ought to be a really cheap workhorse opamp, ten cents maybe.
Already exists. LM358, $0.09 in quantity 1 from Newark. And it's a dual!
http://octopart-clicks.com/click/vpt...077166e&vpid=1
16013415
Cheers
Phil Hobbs
But the LM358 doesn't use any bias, and so there is crossover distortion at
the mid point if used in a linear application such as audio. Maybe that's
not an issue for other applications?
-Bill
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