Capacitive sensors are PIC® MCU pins connected to an area of conductive material through an optional series resistor. As the environment changes around the sensor, the capacitance of the conductive material relative to ground will change. While there are many methods for measuring the capacitance of the pin, most require special hardware or an advanced digital filtering system to achieve a clean signal.
Microchip’s differential Capacitive Voltage Divider (CVD) acquisition technique has been developed to require only an Analog-to-Digital Converter (ADC) and a minimal amount of digital processing overhead. This allows CVD to be implemented on the widest range of devices.
Microchip's 8-bit PIC MCUs
PIC microcontrollers are finding their way into new applications like smart phones, audio accessories, video gaming peripherals and advanced medical devices. Microchip provides solutions for the entire performance range of 8-bit microcontrollers, with easy-to-use development tools, complete technical documentation and post design-in support through a global sales and distribution network.
16-bit PIC24 MCUs
Microchip's 16-bit, PIC24 MCUs and dsPIC® Digital Signal Controllers provide designers with an easy upgrade path from 8-bit PIC® microcontrollers and a cost effective option to 32-bit MCUs. The broad product line includes everything from eXtreme Low Power microcontrollers to high-performance digital signal controllers. With single cycle execution, deterministic interrupt response, zero overhead looping, and fast DMA, the dsPIC family also adds a single cycle 16x16 MAC and 40-bit accumulators, ideal for math intensive applications like motor control and digital power.