Hello All,

I am trying to understand how mismatch in resistors would affect the performance of resistor string DAC.

Suppose if the DAC assures the voltage range between V1 and V2 , will mismatch between the resistors affect the voltage range?
Is it going to affect the DAC step size and linearity?

I would like to get a clear picture of how mismatch between resistors would affect the resistor string DAC performance?

Appreciate your time.

In general, in order to appreciate the effect of spreading of R-values on the monotonicty of the DAC, you have to rely on monte carlo sims.
Run a mc analysis as you switch from one R value to the next bit.
See the distribution of voltage or current or gain you're interested in.
As you go from nth bit to (n+1) th bit- smaller the spread, the better. Foir e.g
μ(n) + 3σ  should be < μ(n+1) - 3σ

Hope this helps.