SLASF77A December 2022 – September 2023 AFE11612-SEP
PRODUCTION DATA
Parasitic resistance (in series with the remote diode) to the D+ and D– inputs of the device 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 device implements a technology to automatically cancel out the effect of this series resistance, thus providing a more accurate result without requiring user characterization of this resistance. With this technology, the device is able to reduce the effects of series resistance to typically less than 0.0075°C per ohm. The resistance cancellation is disabled when the RC bit in the temperature configuration register is cleared (0).