Parasitic resistance (seen in series with the remote diode) to the IN+ and IN– inputs to the AMC6821-Q1 is caused by a variety of factors, including printed circuit board (PCB) trace resistance and trace length. This series resistance appears as a temperature offset in the remote sensor temperature measurement, and causes more than 0.45°C error per ohm. The AMC6821-Q1 is implemented with a TI-patented technology to automatically cancel out the effect of this series resistance, giving a more accurate result without the need for user characterization of this resistance. With this technology, the AMC6821-Q1 is able to reduce the effects of series resistance to typically less than 0.0025°C per ohm.