AN3395

Conclusion

Doc ID 018779 Rev 1

9/11

5

Conclusion

This document provides guidance to the user for the selection, the power consumption

consideration and the layout of the sensing resistor used with the STC310x battery monitor

for gas gauge applications. In most applications, 33 m

Ω or 20 mΩ resistance is preferred to

avoid power consumption concerns. With regards to PCB layout, the sensing resistor should

be positioned as close to the STC310x as possible and the two terminals of Rcg directly

connected to the CG and GND pins of the STC310x. The sensing resistor should be

connected to the PCB ground plane. In the event of RF frequency exposure, capacitive

filtering should be implemented by the parallel placement of high-frequency ceramic

capacitors to avoid the disturbance of the GND pin of the STC310x for more accurate SOC

measurement.