AKM has touch sensor product lineup for resistive touch screens.
Resistive touch screen controllers can detect touch locations in both X and Y axes of a resistive panel and touch pressure. They have an internal oscillator, supporting dual touch gestures and analog voltage measurement functions. They are widely used in portable devices, digital still cameras, digital video cameras, smart phones and portable media players.
AK4187/AK4188/AK4189: Resistive Touch Screen Controller for Dual Touch GestureThe AK4187/AK4188/AK4189 is a resistive touch screen controller that supports dual touch gestures. Supporting dual touch gestures with a resistive touch screen has been seemed impossible conventionally. The touch screen controllers detect touch location in X and Y axis coordinates, pen pressure, dual touch, the center point coordinate and it measures tow point distance. An internal oscillator reduces the processing load of a host computer, and median averaging filters are also available.