A memory device according to the present technology includes a memory cell array configured to include planes having a plurality of memory cells, a page buffer connected to at least one memory cell among the memory cells through a bit line and configured to perform a sensing operation of reading data stored in the at least one memory cell connected to the bit line, a common reference voltage generator configured to generate a common reference voltage, a plurality of merged buffers configured to generate a reference signal using the common reference voltage, and control logic configured to control an operation of the common reference voltage generator and the merged buffers so that page buffer control signals generated based on the reference signal are supplied to the page buffer.