A/D conversion device having a programmable transfer characteristic

摘要

The invention relates to an A/D conversion device intended to supply at the output a digital signal Vout[0:7] resulting from the conversion of an analog input voltage Vin and receiving a control signal CRS used for defining the transfer characteristic of the device by way of comparison with the output signal Vout[0:7]. According to the invention, such a device comprises a reference module (AO, CMP2) which allows adjustment of the digital value of the output signal Vout[0:7] at a predetermined value when the analog input voltage Vin is zero, and means (Mx, Vact) for substituting for said voltage Vin a reference voltage Vref having a predetermined value when the device is in its control mode.