Questions about optimizing Sensor outputs to dsp/microcontroller A/D inputs

steve wrote:

> I assume the resistor your
> talking about is for current limiting to protect the  A/D.

No. If it's a proper design and sensor connection is persistent, 
there's no need to protect the A/D. If there's a socket/connector 
pair on a removable cable, this might be an aspect.

This resistor is only something that I've become used to and just 
for convenience:
I never directly connect two parts of a design unless unavoidable.

If there's a resistor, this resistor can easily be removed, which 
results in two isolated, testable parts of my circuit.
If there wouldn't be a resistor, isolating both parts might be 
difficult without damaging the board.

If I have the choice, I insert a 0805 SMD resistor with 0 Ohms for 
this purpose. This one can easily be removed with the soldering 
iron, and later on, even a spot of solder would repair it.

Bernhard   

Bernhard Holzmayer <holzmayer.bernhard@deadspam.com> wrote in message news:<1137894.887Vmyn2z7@holzmayer.ifr.rt>...

> If there's a resistor, this resistor can easily be removed, which 
> results in two isolated, testable parts of my circuit.
> If there wouldn't be a resistor, isolating both parts might be 
> difficult without damaging the board.
> 
> If I have the choice, I insert a 0805 SMD resistor with 0 Ohms for 
> this purpose. This one can easily be removed with the soldering 
> iron, and later on, even a spot of solder would repair it.
> 
> Bernhard

Ok, I understand, yes that's a great idea for debug.
steve