According to one embodiment, a semiconductor integrated circuit is configured to convert a difference between a first analog voltage and a second analog voltage into a digital signal. The semiconductor integrated circuit includes m (m is an integer greater than or equal to 2) first capacitors and second capacitors. Each of the m capacitors has a first electrode and a second electrode, and the first electrodes are connected to each other. Each of the m second capacitors has a third electrode and a fourth electrode, and the third electrodes are connected to each other. The semiconductor integrated circuits further includes: a comparator configured to compare a voltage of the first electrode and a voltage of the third electrode; and a logic circuit configured to generate the digital signal based on a comparison result of the comparator.