TTP223 Capacitor Type Single Channel Touch Sensor

TTP223 capacitor touch sensor supports momentary or latching/toggle modes. TTP223 works on the input voltage of 2V to 5.5V DC.TTP223 capacitor type single-channel touch sensor provides two working modes i.e., Fast mode and Low power mode which can be selected using the pad option (LPMB pin). Response time of capacitor type TTP223 Touch sensor is 60mS in fast mode whereas 220mS in low power mode. This sensor is designed to replace the traditional physical buttons. TTP223 capacitor type single-channel touch sensor has 3 ports i.e., GND, I/O and VCO. GND is connected to the ground of the circuit while VCO is connected to the positive end of the power source. I/O is connected to the one end of the load that has to be controlled using the touch sensor. In this sensor, there is an electrode which acts as a plate of the capacitor and forms a parasitic capacitor. When a conductive load is brought closer to the touchpad it acts as the other plate of the capacitor and change in capacitance occurs. This change in capacitance is detected by the measuring circuit connected to it which generates a trigger signal and the switch is activated.