Microchip Technology AVR DA 8-Bit Microcontrollers

The AVR DA uses Core Independent Peripherals (CIPs) with low-power features and 5V operation for increased noise immunity. The Event System and Configurable Custom Logic (CCL) peripherals, along with Intelligent Analog peripherals, like 12-bit differential Analog-to-Digital Converter (ADC), Zero-Cross Detect (ZCD), 10-bit Digital-to-Analog Converter (DAC), and the latest-generation Peripheral Touch Controller (PTC) with Driven Shield technology, make the AVR DA MCUs ideal for low-latency control applications and capacitive touch user interfaces. The AVR DA family is designed to bring capacitive touch sensing and real-time control functions to industrial control, home appliance products, automotive, Internet of Things (IoT), and other applications. The Microchip Technology AVR DA MCUs support up to 46 self-capacitance and 529 mutual-capacitance touch channels, which makes the AVR DA series an excellent choice for Human Machine Interface (HMI) applications where multiple capacitive touch keys, sliders, wheels, or 2D surface gestures are required.

State-of-the-Art Capacitive Touch

The PTC offers built-in hardware for capacitive touch measurement on sensors that function as buttons, sliders, wheels, and 2D surfaces. The PTC is designed to perform capacitive touch acquisition on sensors independently from the CPU, resulting in low CPU utilization and reduced power consumption.

The AVR DA MCUs support up to 46 self-capacitance and 529 mutual-capacitance touch channels, which makes the AVR DA series an excellent choice for Human Machine Interface (HMI) applications where multiple capacitive touch keys, sliders, wheels, or 2D surface gestures are required.

• Driven Shield+ for increased noise immunity and water tolerance when using self-capacitance touch sensing.
• Boost Mode for faster response time in high node count interfaces using mutual-capacitance touch sensing.

Intelligent Analog

The 12-bit differential Analog-to-Digital Converter (ADC) with conversion speeds of 130ksps provides accurate and timely analog signal acquisition. Triggering and notifications can be transmitted to other peripherals without CPU intervention, enabling robust and deterministic response to system events.

The 10-bit DAC output can either be sent to a pin or it can be used to generate an adjustable reference voltage for the Analog Comparator (AC). The AVR DA MCUs feature up to three ACs, each having a dedicated DAC reference.