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Functional Safety Ready Family of Microcontrollers for Real-Time Control, Connectivity and HMI Applications

The AVR® DA family brings real-time control functionality and easy capacitive touch to the low-power performance of AVR microcontrollers (MCUs). It pairs the latest Core Independent Peripherals (CIPs) with a robust Intelligent Analog portfolio to create a device that not only excels as a stand-alone processor but also as a companion MCU in designs that demand precision. The high memory density of the AVR DA family makes these MCUs well suited for both wired and wireless communication-stack-intensive functions.

This family uses the latest 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 family 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.

Getting Started

The AVR128DA48 Curiosity Nano Evaluation Kit* (DM164151) is the ideal platform for rapid prototyping with new tinyAVR MCUs. The USB-powered kit features an on-board programmer/debugger that seamlessly integrates with MPLAB® X and Microchip Studio (IDEs). The small form factor makes the board ideal for breadboard soldering, or you can combine it with the Curiosity Nano Base for Click boards™, which features multiple mikroBUS™ sockets so you can easily add sensors, actuators or communications interfaces from Mikroelektronika’s extensive selection of Click boards.

*This board is based on the 128 KB 48-pin AVR DA MCU. An evaluation kit with the 64-pin AVR DA is not available.

Functional Safety Ready for Safety-Critical Applications

The AVR DA family is recommended for safety-critical applications targeting appliance (IEC 60730), industrial (IEC 61508) and automotive (ISO 26262) products. We also offer the MPLAB® XC8 Functional Safety Compiler License, which is a TÜV SÜD certified compiler package supporting PIC® and AVR® microcontrollers that includes qualification documentation for MPLAB X Integrated Development Environment (IDE) and MPLAB programmers. Documents such as FMEDA reports and safety manuals are available on request. Please contact your local Microchip sales office or your distributor for more information.

System Features

Create State-of-the-Art Applications with Capacitive Touch

The PTC offers built-in hardware for capacitive touch measurement on sensors that function as buttons, sliders, wheels and 2D surfaces. It 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 family comes with the latest-generation PTC with Driven Shield+ and Boost Mode technologies. Driven Shield+ technology enables better noise immunity, water tolerance and enhanced sensitivity, while the Boost Mode enables increased Signal to Noise Ratio (SNR) for even greater robustness against noise or reduced touch acquisition time to enable more responsive capacitive touch designs.

  • Low CPU load with 5% CPU load scanning, 10 channels at 50 ms scan rate
  • Glove support for interface applications intended for cold or harsh environments
  • Driven Shield+ technology for moisture robustness and reliability even with droplets of water
  • Boost Mode increases SNR or reduces touch acquisition time
  • Touch interface options:
    • Buttons, sliders and wheels
    • 2D surface
    • Proximity sensing
  • Mix-and-match sensor configurations with:
    • Up to 46 self-capacitance sensors
    • Up to 529 mutual-capacitance sensors
  • Auto calibration with zero drift over temperature and voltage

Family Offering (Pin Count vs. Memory) 

Key Features

  • Internal 24 MHz oscillator
  • Up to 16 KB SRAM
  • Up to 22-channel, 130 ksps 12-bit differential Analog-to-Digital Converter (ADC)
  • 10-bit 350 ksps Digital-to-Analog Converter (DAC)
  • Analog Comparator with scalable reference input
  • 16-bit Real Time Clock (RTC) and Periodic Interrupt Timer


  • Configurable Custom Logic (CCL) peripheral
  • Up to 10-channel Peripheral Event System
  • Configurable, internally generated reference voltage
  • USART/SPI/dual-mode Two-Wire Interface (TWI)
  • Up to three Zero Cross Detectors (ZCDs)
  • Cyclic Redundancy Check (CRC) scan

Easy Prototyping and Evaluation

Evaluating and prototyping user interfaces using buttons, slider, wheels and 2D surface gestures is easy using the AVR128DA48 Curiosity Nano in combination with the Curiosity Touch Adapter board and one of the QTouch® Xplained Pro Extension Kits listed below.

AVR DA Family Products

View All Parametrics
Product Flash (KB) Pin Count Price 5K HW Touch ADC Res (bits) ADC ch
AVR128DA28 64 28 1.1100 PTC 12 22
AVR128DA32 128 32 1.2200 PTC 12 14
AVR128DA48 128 48 1.3200 PTC 12 18
AVR128DA64 128 64 1.5300 PTC 12 22
AVR32DA28 32 28 0.9100 PTC 12 10
AVR32DA32 32 32 0.9900 PTC 12 14
AVR32DA48 32 48 1.1500 PTC 12 18
AVR64DA28 64 28 0.9900 PTC 12 10
AVR64DA32 64 32 1.0900 PTC 12 14
AVR64DA48 64 48 1.2000 PTC 12 18
AVR64DA64 64 64 1.4000 PTC 12 22