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<p>agreed<br>
</p>
<br>
<div class="moz-cite-prefix">On 8/15/2018 10:11 AM, Justin Herrmann
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:trinity-762dbce4-82c8-4218-9ec3-e97b8c7fc398-1534353082882@msvc-mesg-gmxus007">
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<div class="mail_android_message" style="line-height: 1; padding:
0.5em">That might be your most limiting factor here, that the
component must be through hole. There's so much more selection
available in SMD, it's not even funny. <br>
<br>
Justin<br>
</div>
<div class="mail_android_quote" style="line-height: 1; padding:
0.3em">On 08/15/2018, 11:48 AM Pete Hartman
<a class="moz-txt-link-rfc2396E" href="mailto:pete.hartman@gmail.com"><pete.hartman@gmail.com></a> wrote:
<blockquote class="gmail_quote" style="margin: 0.8ex 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div dir="ltr">Is an SMD -> TH adapter an option, Dave?<br>
<br>
That would save you having to do any SMD layout, but let you
get the advantage of the better/newer SMD parts....</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Aug 15, 2018 at 11:10 AM,
Roman <span dir="ltr"><<a href="mailto:modular@go2.pl"
target="_blank" moz-do-not-send="true">modular@go2.pl</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>The answer to A) is no, because of 1)<br>
</div>
<div>Recently I made some THT design and was just so
happy about it until I found how many parts that I
freely use in SMD are simply not made in THT, so the
choice usually comes to one part if any.<br>
</div>
<div><br>
</div>
<div>The answer to B) is usually Mouser, but they have
sometimes errors in describing parameters, or take
different values to the table, like "typical" for one
part and "minimum" for the other part. Sometimes I use
DigiKey, mostly because they seem to have more refined
parameters to search and I can type the quantity of
interest, and then sort by the price. Mouser sorts
only at qty 1 which is useless.<br>
</div>
<div>And obviously all manufacturer's websites contain
parametric search, which is the most accuratre, but
still I prefer Mouser because it gives me guidance of
the price and availability.<br>
</div>
<div><br>
</div>
<div>And if it's for some S&H, why don't you stick
with TL0xx? Are you sure your switching key has lower
leakage than bias of TL0xx opamp? Or try LF347 maybe
but it's inferior to LF444 in this application anyway.<br>
</div>
<div><br>
</div>
<div>Give LF444 a chance, get new ones, maybe they were
handled very badly and inputs were damaged by ESD
because of bad storage. They would still work but bias
may be in range of nA instead of pA.<span
class="HOEnZb"><font color="#888888"><br>
</font></span></div>
<span class="HOEnZb"><font color="#888888">
<div><br>
</div>
<div>Roman<br>
</div>
</font></span>
<div class="HOEnZb">
<div class="h5">
<div class="m_-2056294727733205607nh_extra">
<p>Dnia 15 sierpnia 2018 05:48 David G Dixon <<a
href="mailto:dixon@mail.ubc.ca"
target="_blank" moz-do-not-send="true">dixon@mail.ubc.ca</a>>
napisał(a):<br>
</p>
<blockquote class="m_-2056294727733205607nh_quote"
style="border-left:2px solid
#999;padding-left:8px;margin:0">
<div id="m_-2056294727733205607gwp3c8fd2db">
<div>Hey Team,<br>
</div>
<div><br>
</div>
<div>I'm looking for opamps with the following
properties:<br>
</div>
<div><br>
</div>
<div>1) Through-hole<br>
</div>
<div>2) Quad opamp<br>
</div>
<div>3) 14-DIP package<br>
</div>
<div>4) High power range (+/-18V, say)<br>
</div>
<div>5) Low input bias current (10 pA or less
typical)<br>
</div>
<div>6) Pin-compatible with TL074, etc.<br>
</div>
<div>7) Not LF444 (cuz they all seem to be
defective)<br>
</div>
<div><br>
</div>
<div>So, basically, I'm looking for a suitable
alternative for LF444.<br>
</div>
<div><br>
</div>
<div>So, here are my questions:<br>
</div>
<div><br>
</div>
<div>A) Do you know of such a thing<br>
</div>
<div>B) How does one go about finding such a
thing, generally?<br>
</div>
<div><br>
</div>
<div>Thanks in advance!<br>
</div>
<div>Dave (Floating VCA) Dixon<br>
</div>
<div><br>
</div>
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<pre class="moz-signature" cols="72">--
--Tim Ressel
Circuit Abbey
<a class="moz-txt-link-abbreviated" href="mailto:timr@circuitabbey.com">timr@circuitabbey.com</a></pre>
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