A data transfer circuit includes a first layer for transmitting first bits and a second layer for transmitting second bits. Each of the first layer and the second layer includes: first to mth banks configured to convert a plurality of received digital pixel signals into first to mth analog voltage signals, wherein ‘m’ denotes an integer which is greater than or equal to ‘2’; first to mth samplers configured to convert the first to mth analog voltage signals into first to mth digital transmission signals; and first to mth digital transfer units configured to respectively receive the first to mth digital transmission signals.