CMOS compatible dew point sensor device and method of determining a dew point

A method for determining a dew point, the method comprising:

• determining, for each capacitor element of a plurality of capacitor elements of a capacitor, an increase of a capacitance of the capacitor element caused by a decrease of a temperature of the capacitor;
• and
• deriving the dew point from a temperature at which the increases of the capacitances or values corresponding to the increases of the capacitances exceed a predefined limit by:
• generating a set of binary digits, each of the binary digits corresponding to one of the capacitor elements and indicating whether the capacitance of the capacitor element is within a predefined range,
• comparing sets of binary digits generated at different temperatures and determining a number of capacitor elements for which the corresponding binary digits of the sets are different;
• and
• repeating the comparison for a sequence of sets generated at decreasing temperatures until an increase of the numbers thus obtained exceeds the predefined limit.