An integrated circuit comprising: a first pair of terminals (125, 126) coupled to a first sheet of resistive material of a resistive touch screen; a second pair of terminals (127, 128) coupled to a second sheet of resistive material of the resistive touch screen; a control circuit that during a first time period supplies one of a plurality of selectable voltages onto a first of the first pair of terminals and that couples a second of the first pair of terminals to a ground potential such that said one of the plurality of selectable voltages is impressed across the first sheet, and that during a second time period supplies said one of the plurality of selectable voltages onto a first of the second pair of terminals and that couples a second of the second pair of terminals to the ground potential such that said one of the plurality of selectable voltages is impressed across the second sheet; and an analog-to-digital converter that measures a first voltage present on one of the terminals of the second pair of terminals during the first time period and generates therefrom a first measurement value, and that measures a second voltage present on one of the terminals of the first pair of terminals during the second time period and generates therefrom a second measurement value, wherein the first and second measurement values are touch screen point of contact location measurements, wherein the ADC has a convertible input voltage range over which it can generate an output measurement corresponding to a voltage on an input of the ADC, and wherein a voltage difference between said one of the plurality of selectable voltages and ground potential is substantially smaller than all of the convertible input voltage range. a first pair of terminals (125, 126) coupled to a first sheet of resistive material of a resistive touch screen; a second pair of terminals (127, 128) coupled to a second sheet of resistive material of the resistive touch screen; a control circuit that during a first time period supplies one of a plurality of selectable voltages onto a first of the first pair of terminals and that couples a second of the first pair of terminals to a ground potential such that said one of the plurality of selectable voltages is impressed across the first sheet, and that during a second time period supplies said one of the plurality of selectable voltages onto a first of the second pair of terminals and that couples a second of the second pair of terminals to the ground potential such that said one of the plurality of selectable voltages is impressed across the second sheet; and an analog-to-digital converter that measures a first voltage present on one of the terminals of the second pair of terminals during the first time period and generates therefrom a first measurement value, and that measures a second voltage present on one of the terminals of the first pair of terminals during the second time period and generates therefrom a second measurement value, wherein the first and second measurement values are touch screen point of contact location measurements, wherein the ADC has a convertible input voltage range over which it can generate an output measurement corresponding to a voltage on an input of the ADC, and wherein a voltage difference between said one of the plurality of selectable voltages and ground potential is substantially smaller than all of the convertible input voltage range.