AVR32DA28-I/SO

Overview

The AVR32DA28-I/SO is an 8-bit microcontroller from the AVR DA family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 32 KB of Flash memory, 4 KB of SRAM, and 512 B of EEPROM. The device operates within a voltage range of 1.8 V to 5.5 V and supports industrial temperatures (-40°C to +85°C). Key peripherals include up to three USARTs, two SPI interfaces, one TWI/I2C interface, a 12-bit ADC with 10 channels, a 10-bit DAC, three analog comparators, and a Peripheral Touch Controller (PTC) supporting up to 18 self-capacitance and 81 mutual capacitance channels.

Feature Summary

• Supports vertical migration across the AVR DA(S) family without code modification due to full pin and feature compatibility.
• Integrates intelligent analog features including a 12-bit differential ADC with programmable gain amplifier and a Peripheral Touch Controller for capacitive touch applications.
• Provides advanced digital peripherals such as Configurable Custom Logic (CCL) and an Event System for CPU-independent inter-peripheral signaling.
• Features a single-pin Unified Program and Debug Interface (UPDI) for programming and debugging.

Applications

• Industrial control systems requiring real-time processing and robust I/O capabilities
• Consumer electronics utilizing capacitive touch interfaces via the PTC
• Smart home appliances and IoT devices needing low-power operation and multiple communication interfaces
• Motor control applications benefiting from dedicated timer/counters and zero-cross detectors

Procurement Notes

Verify that the ordering suffix matches the required package style (SOIC-28), temperature grade (I for Industrial), and PDID status (blank for standard, S for PDID support). Confirm supply chain authenticity through authorized Microchip distributors. Ensure design compliance with the specified electrical characteristics and thermal limits outlined in the official datasheet DS40002228.

Selection Notes

Select this component when a balance of moderate memory capacity and rich peripheral integration is required. The AVR32DA28 offers sufficient Flash and SRAM for complex firmware while providing extensive connectivity options like multiple UARTs and high-resolution ADCs. Consider the DA family's vertical migration path if future product scaling might necessitate increased memory or pins without redesigning the PCB layout.

Part Context

This device belongs to the AVR DA(S) family, which utilizes the latest AVR architecture technologies. It shares core specifications with other members like the AVR64DA28 and AVR128DA28, differing primarily in Flash and SRAM sizes. The SOIC-28 package variant provides a surface-mount solution suitable for automated assembly processes in compact electronic designs.

Replacement Considerations

AVR32DA28-S/SO: Identical functional specifications but includes the Program and Debug Interface Disable (PDID) security feature for enhanced firmware protection.

FAQ

Does the AVR32DA28-I/SO support capacitive touch sensing?

Yes, it integrates a Peripheral Touch Controller (PTC) capable of handling up to 18 self-capacitance and 81 mutual capacitance channels for buttons, sliders, and wheels.

What is the maximum operating frequency of the AVR32DA28-I/SO?

The AVR CPU runs at a maximum clock speed of 24 MHz.

Can the AVR32DA28 be upgraded to higher memory variants without changing the PCB?

Yes, the AVR DA(S) family allows vertical migration. Devices like the AVR64DA28 and AVR128DA28 are fully pin and feature compatible with the AVR32DA28, allowing code upgrades without hardware changes.