Analog-to-Digital Converter and Sensor Arrangement Including the Same

An analog-to-digital converter, comprising:

• an input terminal for an analog signal to be converted;
• a first output terminal for a digital signal representing the analog signal to be converted;
• a terminal for a reference signal;
• a summing node connected to the input terminal for the analog signal to be converted, the summing node having a second output terminal;
• an integrator connected downstream of the summing node;
• a comparator connected downstream of the integrator and having a terminal for a clock signal and further having an output;
• a feedback loop including a switch controlled by the output of the comparator, the switch connected between an input of the summing node and the terminal for the reference signal;
• a gain element connected between the second output terminal of the summing node and the integrator, the gain element configured to switch between a first gain and a second gain, the first gain being different from the second gain, wherein the gain element is configured to operate with the first gain during a first number of cycles of the clock signal and to operate with the second gain during a consecutive second number of cycles of the clock signal;
• and
• a counter connected downstream from the comparator, the counter configured to selectively count one of a first increment step size and a second increment step size in response to a signal from the comparator and dependent on one of the first gain or second gain, the counter connected to the first output terminal to provide the digital signal.