Microchip`s new Functional Safety Ready Family of 8-bit AVR Microcontrollers – DA-Family – for Real-Time Control, Connectivity and HMI Applications

The family uses the latest Core Independent Peripherals 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. 

Functional Safety Ready for Safety-Critical Applications

The AVR DA family is recommended for safety critical applications targeting both industrial and automotive products (IEC 61508 and

ISO 26262). We also offer the MPLAB® XC8 Functional Safety Compiler License, which is a TÜV SÜD certified compiler package that supports 8-bit PIC® and AVR® microcontrollers. Documents such as FMEDA reports and safety manuals are available on request. Safety-certified development tools are also available for this product. Please contact your local Microchip sales office or your distributor for more information.

AVR DA Key Attributes

  • Internal 24 MHz oscillator
  • Up to 128 KB of Flash memory
  • 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
  • Up to three Zero Cross Detectors (ZCDs)
  • Cyclic Redundancy Check (CRC) scan
  • 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)
  • Available packages:
    • 64-pin TQFP/VQFN
    • 48-pin TQFP/VQFN
    • 32-pin TQFP/VQFN
    • 28-pin SOIC/SSOP/SPDIP

Key Features for Capacitive Touch

  • 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
  • Gesture support
  • 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

The AVR DA family supports up to 46 self-capacitance and 529 mutual-capacitance touch channels, which makes the AVR DA family an excellent choice for human interface applications where multiple capacitive touch keys, sliders, wheels or 2D surface gestures are required.

Evaluation Board: Getting started

The AVR128DA48 Curiosity Nano Evaluation Kit* is the ideal platform for rapid prototyping with AVR DA MCUs. This USB-powered kit features an on-board programmer/debugger that seamlessly integrates with MPLAB X, Atmel Studioand IAR Embedded Workbench Integrated Development Environments (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.

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