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Rod Eliot project 88 question
Rod Eliot project 88 question
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Old 18th September 2018, 12:10 PM   #151
Mixi is offline Mixi  Europe
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ok, so i guess both options are equally fine. that's good to hear. and i can save 40 cents on buying fewer caps :-)
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Old 18th September 2018, 04:27 PM   #152
Mixi is offline Mixi  Europe
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thread has been moved. finally
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Old 18th September 2018, 08:08 PM   #153
Hicoco is offline Hicoco  France
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Quote:
Originally Posted by prasi View Post
Hello Mixi,
I always use 0.1uF cap from each supply pin to ground and datasheet recommends it too and generally X7R ceramic are used.

clause 10.2 on page 19 http://www.ti.com/lit/ds/symlink/opa2134.pdf
Hi Prasi,
Do you have any X7R ceramic cap preference?
Thank
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Old 19th September 2018, 02:39 AM   #154
prasi is offline prasi  India
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Rod Eliot project 88 question
Quote:
Originally Posted by Hicoco View Post
Hi Prasi,
Do you have any X7R ceramic cap preference?
Thank
Hello Hicoco,
Generally I use whatever available in parts bin, some times I even use film caps in that position.

here is a mouser results, any of these would be ok .

Radial 0.1 uF 100 VDC X7R Multilayer Ceramic Capacitors MLCC - Leaded | Mouser India

regards
Prasi
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Old 19th September 2018, 07:54 AM   #155
Mixi is offline Mixi  Europe
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Originally Posted by ivanlukic View Post
Mixi,

You did it right. Bypass using single 100nF between supply rails is as good as bypass from supply pins to ground. And is much simpler for DIY-ers, and for PCB design. Doug Self recommends it in his Small Signal Audio book.
Do you know which chapter mentions this? I tried to read up on it but couldn‘t find it.
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Old 19th September 2018, 10:29 AM   #156
Hicoco is offline Hicoco  France
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Originally Posted by Mixi View Post
Do you know which chapter mentions this? I tried to read up on it but couldn‘t find it.
Look at the example Figure 2 - Bypassing The Op Amp Supplies and explanation below it
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