1. An electronics assembly comprising: a contact configured to receive a sensor signal from an analyte sensor assembly in contact with a body, the sensor signal representative of a level of an analyte in the body; an integrator circuit coupled to the contact and configured to provide an integrator output signal representative of the sensor signal integrated from a first time to a second time; a reset circuit coupled to the integrator circuit and configured to reset the integrator output signal in response to a reset signal; and a processor circuit coupled to the integrator circuit and the reset circuit, the processor circuit configured to determine a value of the integrator output signal and to provide the reset signal to the reset circuit when an integration interval has elapsed from the first time, the integration interval based at least in part on the integrator output signal.