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<div class="moz-cite-prefix">On 06.08.2020 23:41, Mattias
Rickardsson wrote:<br>
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cite="mid:CAP92RBU4anxTkQ0MJmWxMkHbAGur7bZguqT=E3JqaX_XkqNK5Q@mail.gmail.com">
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<div dir="ltr">On Thu, 6 Aug 2020 at 22:52, René Schmitz <<a
href="mailto:synth@schmitzbits.de" moz-do-not-send="true">synth@schmitzbits.de</a>>
wrote:<br>
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And a reason to avoid letting four opamps sizzle hot in a
SO16 quad package.</blockquote>
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<div>Or SO14. ;-)</div>
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<p>I should have better written smd package. <br>
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<p><br>
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<p>You have two times the dissipation in a 074 vs a 072. (Assuming
equal dissipation per amp.) <br>
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<p>But the thermal resistance isn't halved. So I would expect the
amp to be hotter in a 074 than in a 072, <br>
</p>
<p>with the consequential higher leakage and other effects.</p>
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<p> </p>
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<div>From the TL07x datasheet, section 6.7 Thermal Information
for TL074 in 14-pin packages,</div>
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<div>Junction-to-ambient thermal resistance</div>
<div>SOIC: 86 degrees/watt</div>
<div>PDIP: 80 degrees/watt</div>
<div>SO: 76 degrees/watt</div>
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<div>So, SO is the coolest package, no?</div>
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<p>Looks like it. Most common seems to be the SOIC and PDIP though.
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<p>Best,</p>
<p> René</p>
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<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-abbreviated" href="mailto:synth@schmitzbits.de">synth@schmitzbits.de</a>
<a class="moz-txt-link-freetext" href="http://schmitzbits.de">http://schmitzbits.de</a></pre>
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