An integrated circuit field-to-electrical energy sensor is capable of being energized through two DC voltage supply terminals (18, 20). Each of a plurality of such sensors, when connected in parallel so as to be energized from a single DC supply voltage source, is capable of recognizing by means of an address code comparator (28) a unique pulse signal code superimposed on the DC supply voltage (VCC). Stimulated by that code which is unique only to that sensor, that sensor powers up a transducer (38), e.g. Hall element, and responds by drawing a particular current pattern from the common DC voltage source indicative of the presence (or absence) of a field, e.g. magnetic, that is ambient to that sensor. Electrically controlled energy to the transducer (38) provided only when the unique code is present is supplied by the switchable of two regulated voltage outputs from a dual voltage regulator (36) having a control input connected to the output of the address code comparator (28). The steady (unswitched) regulated output voltage supplies energy to the MOS logic including the address code comparator. The sensor quiescent current drawn from the DC voltage supply line is thereby caused to be very low value which becomes increasingly advantageous as more and more sensors are operated in parallel on the same DC supply line.