The LC717A10AR is a high-performance and low-cost capacitance-digital-converter LSI for electrostatic capacitive touch sensor, especially focused on usability. It has 16 channels capacitance-sensor input. This makes it ideal for use in the products that need many switches. Since the calibration function and the judgment of ON/OFF are automatically performed in LSI internal, it can make development time more short. A detection result (ON/OFF) for each input can be read out by the serial interface (I
C compatible bus or SPI). Also, measurement value of each input can be read out as 8-bit digital data. Moreover, gain and other parameters can be adjusted using serial interface.

• Detection system: Differential capacitance detection (Mutual capacitance type)
• Input capacitance resolution: Can detect capacitance changes in the femto Farad order
• Measurement interval (16 differential inputs):
• 30ms (Typ) (at initial configuration),
• 6ms (Typ) (at minimum interval configuration)
• External components for measurement: Not required
• Interface: I
• C compatible bus or SPI selectable.
• Current consumption: 570 µA (Typ) (V
• = 2.8 V), 1.3 mA (Typ) (V
• = 5.5 V)
• Supply voltage: 2.6 V to 5.5 V
• Detection operations: Switch