Abstract: A detection device includes a substrate and a die. The substrate provides a first voltage. The die is disposed adjacent to the substrate. The die includes a plurality of resistor paths, a selection circuit, an ADC (Analog-to-Digital Converter), and a digital circuit. The selection circuit selects one of the resistor paths as a target path. The target path provides a second voltage. The ADC generates a digital signal according to the first voltage and the second voltage. The digital circuit processes the digital signal.