PreviousPreviousNextNext
Example 3
Let's be sure we understand this.
  1. Question: In the previous question, what part of an LSB is the output error?
  1. To answer this question we need to know both the error and the value of the LSB, then divide the the error by the LSB value.
  1. Solution:

    Error = 1.5V - 1 .4953125V

    = 0.0046875V

    1 LSB = VREF / 2n = 3.3 / 28

    = 0.01289063V/LSB

    LSB Error = Error / 1 LSB

    = 0.0046875V / 0.01289063V/LSB

    LSB Error = 0.3636 LSB
It's True!
It's True!
The input code we actually desired was 116.3636, which we had to round to 116. The LSB error is the same as the round off error, which is always the case.
PreviousPreviousNextNext