CAP1203

CAP1203 3-Channel Capacitive Touch Sensor General Description The CAP1203 is a multiple channel capacitive touch sensor controller. It contains individual capacitive touch sensor inputs with programmable sensitivity for use in touch sensor applications. Each sensor input is calibrated to compensate for system parasitic capacitance and automatically recalibrated to compensate for gradual environmental changes. The CAP1203 includes Multiple Pattern Touch recognition that allows the user to select a specific set of buttons to be touched simultaneously. If this pattern is detected, a status bit is set and an interrupt is generated. The CAP1203 has Active and Standby states, each with its own sensor input configuration controls. Power consumption in the Standby state is dependent on the number of sensor inputs enabled as well as averaging, sampling time, and cycle time. Deep Sleep is the lowest power state available, drawing 5µA (typical) of current. In this state, no sensor inputs are active, and communications will wake the device. Applications Desktop and Notebook PCs LCD Monitors Consumer Electronics Appliances Features Three (3) Capacitive Touch Sensor Inputs - Programmable sensitivity - Automatic recalibration - Calibrates for parasitic capacitance - Individual thresholds for each button Multiple Button Pattern Detection Power Button Support Press and Hold Feature for Volume-like Applica- tions 3.3V or 5V Supply Analog Filtering for System Noise Sources...