AVR32DA28-E/SS

Overview

The AVR32DA28-E/SS 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 supply voltage range of 1.8 V to 5.5 V and supports an extended temperature range of -40°C to +125°C. Key peripherals include a 12-bit ADC, three analog comparators, a 10-bit DAC, two zero-cross detectors, and a Peripheral Touch Controller. It utilizes a 28-pin SSOP package.

Feature Summary

• Supports secure firmware upgrades via Program and Debug Interface Disable (PDID) for application code protection
• Integrates intelligent analog features including a 12-bit differential ADC, three analog comparators, and a 10-bit DAC
• Enables CPU-independent inter-peripheral signaling through the Event System and Configurable Custom Logic (CCL)
• Provides capacitive touch sensing capabilities using the Peripheral Touch Controller (PTC) with Driven Shield+ technology

Applications

• Secure embedded control systems requiring protected firmware updates
• Industrial automation devices utilizing analog signal processing
• Consumer electronics incorporating capacitive touch interfaces
• Power control applications leveraging zero-cross detection and timer functions

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature rating. Ensure compatibility with existing design constraints regarding pin count and peripheral availability. Confirm that the selected variant meets all functional safety and security requirements for the intended deployment environment.

Selection Notes

Select this component when a balance of moderate memory capacity and advanced analog peripherals is required in a compact 28-pin form factor. Consider the AVR DA family's vertical migration path if future scalability beyond 32 KB Flash is anticipated without code modification. Evaluate the need for PDID security features versus standard programming access based on product lifecycle requirements.

Part Context

This device belongs to the AVR DA(S) family, which shares architectural similarities with other members like the AVR64DA28 and AVR128DA28. These devices offer horizontal and vertical migration paths, allowing designers to scale pin counts and memory sizes while maintaining software compatibility. The AVR32DA28 serves as the entry-level option within the 28-pin segment of this high-performance 8-bit MCU series.

Replacement Considerations

Direct substitutes within the same package and feature set are not explicitly listed in the provided datasheet excerpt. Designers should evaluate other AVR DA family members such as the AVR64DA28 or AVR128DA28 for upward migration, ensuring pin and peripheral compatibility.