Abstract: The invention relates to an analog input (40) for electronic circuit, which input is intended to be connected to an electrical output of a sensor (44) for measuring a physical parameter, the sensor being supplied with a supply voltage Vcc and providing at its electrical output an analog voltage Vs dependent on the parameter to be measured, the analog input comprising at least one analog/digital converter (46, 48) of resolution RN, characterized in that it comprises a computer (64) controlling the analog/digital converter so as to perform an analog/digital conversion of the supply voltage Vcc, the analog/digital converter providing the computer with a digital value Rsupp of the supply voltage Vcc of the sensor, an analog/digital conversion of the analog voltage Vs of the parameter to be measured, the analog/digital converter providing the computer with a digital value r of the analog voltage Vs to be measured, and the computer providing a digital value Vn of the parameter to be measured such that: