An analog-to-digital converter is provided which is configured to output an n-bit signal in response to an analog input signal. n is greater than 1. The converter comprises n comparators, where each comparator is configured to output one bit of the n-bit signal and comprising a first input and a second input. A first comparator is configured to receive the analog input signal at its first input and a reference value at its second input and to output the first, most significant bit of the n-bit signal. For the remaining comparators, an i-th comparator, i=2 . . . n, is configured to output an i-th bit, the analog-to-digital converter comprises a respective i-th input device. The i-th input device is configured to selectively provide one of 2.sup.i1 reference values to one of the first or second input of the i-th comparator and the analog input signal to the other one of the first or second input of the i-th comparator, such that the n-bit signal is a Gray code representation of the analog input signal.