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written 8.1 years ago by |

## Resolution :

The resolution of a converter is the smallest change in voltage which may be produced at the output (or input) of the converter. For example, an 8-bit D/A converter has 2^8-1=255 equal intervals. Hence the smallest change in output voltage is(1/255) of the full scale output range.

Resolution should be high as possible. It depends on the number of bits in the digital input applied to DAC. Higher the number of bits, higher is the resolution.

It can also be defined as the ratio of change in analog output voltage resulting from a change of 1LSB at the digital input.

For n-bit DAC, $$Resolutions = \frac{V_{FS}}{2^n - 1}$$

## Accuracy :

Absolute accuracy is the maximum deviation between the actual converter output and the ideal converter output.

Relative accuracy is the maximum deviation after gain and offset errors have been removed.

## Settling time :

Settling time represents the time it takes for the output to settle within a specified band ±(1/2) LSB of its final value, after the change in digital input.

It should be as small as possible.