[SI-LIST] Re: PCBoard construction for analog signals
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 03 Feb 2014 17:17:05 -0800
As always: It depends. Companies like ADI and TI have lots of app
notes on stuff like this. For high impedance, low current sensors,
active guard traces reduce leakage currents.
Steve
On 2/3/2014 4:46 PM, keithK EPD wrote:
> I am using a mixed (rigid and flex) board (6 layers) for sense analog
> signal around the order of 1uA (a current source). I have multible
> sensors on this board .... after the sensors , the signal travels through
> a 6" section of flex (now 3 layers) , and finally goes to a connector
> away from the sensors.
>
> the questions are: what would be the best way to preserve the most
> signal (x-talk) , interference, etc....
> Should the signals be sandwiched between copper ...
> all signals are analog in nature..... no digital levels anywhere.
>
> keith kowal
> keith@xxxxxxxxxxxxxxxxxxx
>
> any rules of thumb and why would be helpful
>
>
>
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