SNIS218A September 2019 – April 2020 TMP390-Q1
The TMP390-Q1 is extremely simple to layout. Place the power supply bypass capacitor as close to the device as possible, and connect the capacitor as shown in Figure 17. Place the RSETA and RSETB resistors as close to the device as possible. Carefully consider the resistor placement to avoid additional leakage or parasitic capacitance, as this may affect the actual resistor sense value for the trip thresholds and hysteresis. If there is a possibility of moisture condensation on the SETA and SETB circuits, which may lead to additional leakage current, consider adding a conformal coating to the circuits.