1. On PCB, the length of lines from touch pad to IC pin shorter is better. And the lines do not parallel and cross with other lines. 2. The power supply must be stable. If the supply voltage drift or shift quickly, maybe causing sensitivity anomalies or false detections. 3. The material of panel covering on the PCB can not include the metal or the electric element. The paints on the surfaces are the same. 4. The C1 capacitor must be used between VDD and VSS; and should be routed with very short tracks to the device’s VDD and VSS pins (TTP223E-BA6). 5. The capacitance Cs can be used to adjust the sensitivity. The value of Cs use smaller, then the sensitivity will be better. The sensitivity adjustment must according to the practical application on PCB. The range of Cs value are 1~50pF. 6. The sensitivity adjustment capacitors(Cs)must use smaller temperature coefficient and more stable capacitors. Such are X7R, NPO for example. So for touch application, recommend to use NPO capacitor, for reducing that the temperature varies to affect sensitivity.