Patent ID: 8806083

Claim:
An apparatus comprising: a first sensor terminal; a second sensor terminal; a switch network that is coupled to the first and second sensor terminals; a controller that is coupled to the switch network so as to control the switch network; a first current source that is coupled to the switch network; a second current source that is coupled to the switch network; processing circuit that is coupled to the switch network, wherein the processing circuitry receives a sensor measurement through the first and second sensor terminals, and wherein the processing circuit is adapted to provide a representation of the sensor measurement over an inter-integrated circuit (I 2 C) bus; a first comparator having a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal of the first comparator is coupled to the first current source and the switch network, and wherein the second input terminal of the first comparator receives a reference voltage; mapping circuitry that is coupled to the output terminal of the first comparator and that generates a device identifying address; and a second comparator that is coupled to the mapping circuitry, wherein the second comparator indicates whether the device identifying address matches a requested address.