The purpose of this application note is to inform the systemdesigner how to use the HI7190 with a single +5V analogsupply if a -5V analog supply is not available. An inexpensivelow current negative power supply can be generated withthe ICL7660S voltage converter. The ICL7660S VoltageConverter is a monolithic CMOS voltage conversion IC. Thedevice performs supply voltage conversion from positive tonegative for an input range of 1.5V to 12V, resulting incomplementary output voltages of -1.5V to -12V. Only 2noncritical external capacitors are needed for the chargepump and charge reservoir functions. The conversion chipcontains a series DC power supply regulator, RC oscillator,voltage level translator, and four output power MOSswitches. For detailed chip information please refer to theICL7660S datasheet.[1]