LC717A00AR

LC717A00AR Capacitance‐Digital‐Converter LSI for Electrostatic Capacitive Touch Sensors Overview The LC717A00AR is a high-performance, low-cost capacitance- digital-converter LSI for electrostatic capacitive touch sensor, especially focused on usability. It has 8 channels 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, LC717A00AR can operate as stand-alone when the recommended switch pattern is applied. Also, since LC717A00AR has a serial interface compatible with I2Ct 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. Features Detection System: Differential Capacitance Detection (Mutual Capacitance Type) Input Capacitance Resolution: Can Detect Capacitance Changes in the Femto Farad Order Measurement Interval (8 Differential Inputs): ♦ 18 ms (Typ) (at Initial Configuration) ♦ 3 ms (Typ) (at Minimum Interval Configuration) External Components for Measurement: Not Required Current Consumption: ♦ 320 mA (Typ) (VDD = 2.8 V) ♦ 740 mA (Typ) (VDD = 5.5 V) Supply Voltage: 2.6 V to 5.5 V Detect...