Some embodiments of the present disclosure relate to a sensor interface module having a linearization module that increase a size of a linear region of a current output from a high-side current source. The disclosed sensor interface module has a reference voltage source configured to generate a reference signal. An output driver stage having a high-side current source and a low-side current source is connected in series at an output node of the sensor interface module. A closed control loop configured to receive the reference signal and to generate a digital control signal that drives the high-side current source. A linearization module configured to operate the low-side current source to approximate a nonlinearity of the high-side current source and to use the approximated nonlinearity to generate a compensation function that mitigates nonlinearities in the high side current source.