
PERIPHERAL INTERFACING–I 9-25
9.8 | Interfacing an Analog to Digital Converter to the
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Real world applications use sensors to get a signal voltage. For example, for measuring a
temperature, a thermocouple may be the sensor used. This gives an analog voltage corre-
sponding to the temperature value. Various other sensors measure quantities like humid-
ity and speed and give the measured values as analog voltages. To use these values in a
computer, these voltages have to be converted to digital numbers. This is the function of
an analog to digital converter. There are various methods employed in this conversion,
which you might have learned ...