[SI-LIST] Re: Electrical wiring questions
- From: "Mike S." <powersurf@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 18 Feb 2006 18:13:34 +0000
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 separate
> > PCB. I only have one 5 V power supply to power both the sensor and the
> > ADC PCB (this card is also 5V). I believe that the best way to connect
> > 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 with
> > 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 power
> > 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?
> >=3D20
> > Any suggestions or comments are welcome.
> > References like books or other publications that deal with these
> > matters are also welcome.
> >=3D20
> > Thanks in advance
> > Best Regards
> >=3D20
> > B. Mike
>
>
> --=3D20
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