[SI-LIST] Re: Electrical wiring questions

Hello Curt,
I can't change the connectors!
Could you please explain the second idea (capacitively couple my
signal) in more detail?

Thanks for the reply Curt

Best Regards

B. Mike

On 2/18/06, Curt McNamara <CurtM@xxxxxxxxxxx> wrote:
> The classic book is Ralph Morrison -- Grounding and Shielding Techniques.=
  ISBN: 0471245186
>
> For ideas on cable shielding there is nothing better than Henry Ott -- No=
ise Reduction Techniques in Electronic Circuits. ISBN: 0471850683
>
>                                                                  Curt
>
> Curt McNamara. P.E.
> Senior Electrical Engineer
> Logic Product Development
> 411 Washington Ave. N Suite 101
> Minneapolis, MN 55401
> Tel 612-436-5178
> Fax 612-672-0443
> curtm@xxxxxxxxxxx
> www.logicpd.com <file://www.logicpd.com>
> This message (including any attachments) contains confidential informatio=
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If you are not the intended recipient, you should delete this message and a=
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> ________________________________
>
> From: si-list-bounce@xxxxxxxxxxxxx on behalf of Mike S.
> Sent: Sat 2/18/2006 12:13 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Electrical wiring questions
>
>
>
> Thanks for the replies Steve and Deniel.
> Any book suggestions?
>
>
> B. Mike
>
> On 2/18/06, dgun@xxxxxxxxxx <dgun@xxxxxxxxxx> wrote:
> > Since you are stuck with a single-ended sensor, I don't see how
> > the differential ADC will cancel any noise. Probably best to
> > just use it in single-ended mode.
> >
> > --
> > Daniel
> >
> >
> > > From: "Mike S." <powersurf@xxxxxxxxx>
> > > Hello to all,
> > > I would like to ask for some advice and orientation on electrical
> > > wiring matters!
> > > I believe this configuration is very common:
> > > I have an analog sensor with 3 wire leads (Vcc -5 V-, GND, signal)
> > > that will be sampled by a fully differential ADC that is on a separat=
e
> > > PCB. I only have one 5 V power supply to power both the sensor and th=
e
> > > ADC PCB (this card is also 5V). I believe that the best way to connec=
t
> > > this setup is to power the ADC PCB and then, with a single connector
> > > from the ADC PCB to sensor, containing 3 pins (Vcc,GND and signal).
> > > This way would avoid ground loops. The problem is that I don't have
> > > such a connector in the ADC PCB. In fact, I only have a connector wit=
h
> > > 2 pins (Signal+ and Signal-, that are the ADC differential pins). So
> > > the sensor must be powered from the same power supply, but with a
> > > different cable that will not originate in the ADC PCB, but directly
> > > in the power supply.
> > > Since the connector to the sensor in the ADC PCB doesn't have any
> > > ground pin the sensor return current would have to return in the powe=
r
> > > supply ground wire. Although the ADC has fully differential inputs
> > > (that would cancel any induced currents in the loop) I don't think
> > > this is a good solution. Is it?
> > >=3D3D20
> > > Any suggestions or comments are welcome.
> > > References like books or other publications that deal with these
> > > matters are also welcome.
> > >=3D3D20
> > > Thanks in advance
> > > Best Regards
> > >=3D3D20
> > > B. Mike
> >
> >
> > --=3D3D20
> > ___________________________________________________
> > Play 100s of games for FREE! http://games.mail.com/
> >
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