
//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/0750656794-CH034.3D – 350 – [344–369/26]
19.6.2004 9:23PM
34.8 Res olution ^ independent of input voltage
The definition for the resolution of an ADC is the change in input voltage, which will
produce a change of one digit in the digital output.
Resolution ¼
Change in input voltage
Change in digital output
As can be seen this is the reciprocal of the slope of the ADC characteristic graph,
which is independent of the maximum input voltage.
Therefore, the resolution of an ADC can also be defined as:
Resolution ¼
Gain value Offset value
A
Input voltage limitations
If the offset voltage and the volta ...