TDC Applications

Temperature- and resistance measurement

Our TDC501 with its measurement ports is best suited for high precision resistance or temperature measurement. Therefore the discharging times of a capacitor using both, a well known reference resistor and an unknown resistor (e.g. PT100) are measured. The ratio of the time values of both resistors is used to determine the value of the unknown resistor:

Because of the special measurement method of the TDC the results do not depend on long term variation of voltage or temperature. Above equation enables the measurement of a lot of further physical dimensions like pressure or weight when using capacitive sensors.