LC717A00AR Touch Sensor

The LC717A00AR from onsemi is a high-performance, low-cost capacitance-digital-converter LSI for electrostatic capacitive touch sensors, especially those focused on usability. It has 8 channels of capacitance-sensor input. The built-in logic circuit can detect the state (ON/OFF) of each input and output the result. This makes it ideal for various switch applications. The calibration function is automatically performed by the built-in logic circuit during power activation or whenever there are environmental changes. In addition, since initial settings of parameters such as gain are configured, the LC717A00AR can operate as a stand-alone device when the recommended switch pattern is applied. Also, since LC717A00AR has a serial interface compatible with I²C and SPI bus, parameters can be adjusted using external devices whenever necessary. Moreover, outputs of the 8-input capacitance data can be detected and measured as 8-bit data.