AVR-Chat

Tom Becker wrote:

> > ... assume that each of these resistance elements is an individual 1% 
>tolerance resistor.  Total overall tolerance of the R2R ladder is now 16%...
>How do you arrive at that?
>  
>
  Simple mathematics.  The reason tht tolerances are specified as plus 
and minuse is that with any individual ocmponent, you can never know 
which way the value will be off, or by what specific quantity.

  So, with 16 devices each specified to be within + or - 1%, the overall 
tolerance of the network is plus or minus 16%.

  Each comnponent contributes to the overalkl tolerance of  the system.,