Digital-to-analog converter, data driver and display apparatus including the same

A digital-to-analog converter, comprising:

• a voltage generator configured to generate a plurality of voltage groups, each of the plurality of voltage groups having a plurality of reference voltages;
• and
• a decoder having an output node configured to output one of the pluralities of reference voltages from any of the plurality of voltage groups,
• wherein the decoder includes:
• switch blocks that correspond to the plurality of voltage groups;
• and
• first to (m−1)-th connection transistors between a first connection node and an m-th connection node, m being a natural number greater than 1,
• each of the switch blocks includes transistors that are turned on or off by or in response to a control signal,
• the first connection node is directly connected to a first transistor in a first one of the switch blocks and to a second transistor in a second one of the switch blocks,
• the m-th connection node is directly connected to two neighboring (m−1)-th connection transistors,
• each of the (m−1)-th connection transistors is between an (m−1)-th connection node and the m-th connection node,
• a first voltage group corresponding to the first transistor is higher than a second voltage group corresponding to the second transistor,
• a size of the first transistor is greater than a size of the second transistor,
• one of the (m−1)-th connection transistors has a same size as a size of a third transistor of the first one of the switch blocks, and
• the first switch block receives reference voltages equal to or higher than a voltage of the (m−1)-th connection node to which the one of the (m−1)-th connection transistors is connected.