A system includes a bandgap reference voltage circuit, a plurality of trimming resistors, a plurality of trimming switches to connect the bandgap reference voltage circuit to one or more of the plurality of trimming resistors, and an output terminal to connect to at least one of the bandgap reference voltage circuit and the plurality of trimming resistors. The system may provide a trimmed reference voltage independent of at least one of the resistance of any of the plurality of trimming switches and the voltage across any of the plurality of trimming switches.