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Single supply op-amp circuit, ground plane

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asimov_18

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Hi All,
I was wondering in case of OP-Amp circuits running from single supply. Once can derive VDD/2 by using TLE2426 (rail slitter)
or by using potential divider followed by voltage follower as a buffer. The circuits work well.

When doing the PCB for such design should the ground plane be 0V supply or should it be VDD/2?

Regards
Asimov
 

KlausST

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Hi,

use this signal as GND plane that you use as voltage reference.

Imagine you connect a scope to your circuit. Where do yu connect the scope´s GND?

****
But sometimes other considerations neet te be taken into account.
* Shielding
* power supply
* IO...and it´s voltage reference
* ESD, EMI/EMC consideratons.
* what other circuit is connected to the plane
...

Klaus
 
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