[sdiy] low input bias current opamps

[Guy McCusker]

Further annoyance: I did put in the bias current preference when I
made those searches, but the URLs that I copy/pasted don't seem to let
me transfer that information. Oh well, you can fiddle with those
parameters on the site I suppose.



On Wed, Aug 15, 2018 at 8:41 AM, Guy McCusker <guy.mccusker at gmail.com> wrote:
> I am a long way from knowing what I am doing but when I want to play
> with devices with specific parameters like this I use the TI
> parametric search tool.
>
> http://www.ti.com/amplifier-circuit/op-amps/products.html?pqs=pocs&familyid=1293#p480=4;4&p1261min=0.9;30&p1261max=30;105&p2954=PDIP
>
> Weirdly this doesn't bring up the LF444, I think because that is part
> of a "specialist" range of devices not covered by this search. Which
> is annoying.
>
> Here's a similar search for Analog Devices parts:
> http://www.analog.com/en/parametricsearch/11085#/p2687=|4&p4108=0.000038|0.0105&ps5=14%20ld%20PDIP%20(300%20mil)&d=sel|0|300|2839|2840|4089|4095|4108|4500|4502|s3|s5|d
>
> ST have one too but I hate it so I don't use it :)
>
>
>
>
>
>
>
> On Wed, Aug 15, 2018 at 4:43 AM, David G Dixon <dixon at mail.ubc.ca> wrote:
>> Hey Team,
>>
>> I'm looking for opamps with the following properties:
>>
>> 1) Through-hole
>> 2) Quad opamp
>> 3) 14-DIP package
>> 4) High power range (+/-18V, say)
>> 5) Low input bias current (10 pA or less typical)
>> 6) Pin-compatible with TL074, etc.
>> 7) Not LF444 (cuz they all seem to be defective)
>>
>> So, basically, I'm looking for a suitable alternative for LF444.
>>
>> So, here are my questions:
>>
>> A) Do you know of such a thing
>> B) How does one go about finding such a thing, generally?
>>
>> Thanks in advance!
>> Dave (Floating VCA) Dixon
>>
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