Question

The output of 8 bit DAC varies between +10V and -10V.
Calculate the following: i) Resolution ii) Percentage resolution.​

Answer 1

1) 10 mV

In the case of DAC, the resolution is calculated by the exchange of analog voltage corresponding to the increment of LSB bits on the input.

Calculate the resolution (R) as follows:

R=$\frac{VF^{S} }{2n-^{1} }$

No. of levels = 2n – 1

$V_{r}$ is reference voltage 'or' Full-scale voltage.

Given n = 10 bits

V$_{FS}$= 10.23 V

R=$\frac{10.23}{2^{10}-1 }$

R = 10mV

• it can be calculated using the normal percentage formula.

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