Touch screen driving device

A touch screen driving device, comprising:

• a touch screen including Tx channels, Rx channels crossing the Tx channels, and sensor nodes formed at crossings of the Tx channels and the Rx channels;
• a Tx driving circuit configured to supply a Tx driving pulse to the Tx channels;
• a plurality of sensing units configured to sample voltages of the sensor nodes supplied through the Rx channels in response to an Rx sampling clock;
• a multiplexer (mux) array including a plurality of mux switches, each of which is cross-coupled with output terminals of the sensing units adjacent to each mux switch;
• an analog-to-digital converter configured to convert an analog sampling signal sequentially received from the mux array into digital data;
• an average unit configured to average the digital data received from the analog-to-digital converter and remove noise included in the digital data;
• and
• a touch controller configured to analyze the digital data, in which the noise is removed, using a previously determined touch recognition algorithm and output touch data including coordinate information of a touch position.