Photoelectric conversion device and apparatus

A photoelectric conversion device comprising:

• a pixel circuit in which a plurality of pixels are arranged to constitute a plurality of rows and a plurality of columns;
• a plurality of ramp signal lines to which ramp signals of different slopes are supplied;
• and an A/D converter in which a plurality of A/D conversion circuits including a first A/D conversion circuit and a second A/D conversion circuit that are adjacent to each other are arranged in correspondence with one column,
• wherein each of the plurality of A/D conversion circuits includes a selection circuit configured to select a ramp signal line from the plurality of ramp signal lines to select a ramp signal used for A/D conversion, a comparison circuit configured to compare a ramp signal selected by the selection circuit with a pixel signal from the pixel, and a supply line configured to supply the ramp signal from the selection circuit to the comparison circuit,
• the supply line includes a first portion extending from the comparison circuit, and a second portion connecting the first portion and the selection circuit,
• a wiring region in which the supply line is arranged includes a region where the first portion and second portion of the first A/D conversion circuit and the first portion and second portion of the second A/D conversion circuit are arranged parallel on an identical wiring layer, and
• the photoelectric conversion device has at least one of a driving mode in which, while the selection circuit selects, from the plurality of ramp signal lines, a ramp signal line for supplying a first ramp signal and the first ramp signal is supplied to the comparison circuit in the first A/D conversion circuit, the first ramp signal is supplied to the comparison circuit in the second A/D conversion circuit, and a driving mode in which a predetermined voltage is supplied to the comparison circuit.