AVR32EA28-E/SS

Overview

The AVR32EA28-E/SS is an 8-bit microcontroller from the AVR EA family, featuring a 20 MHz AVR CPU with hardware multiplier. It includes 32 KB of Flash memory with read-while-write capability, 4 KB of SRAM, and 512 bytes of EEPROM. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports extended temperature ranges up to +125°C. Key peripherals include a 12-bit differential ADC with PGA, a 10-bit DAC, three USARTs, SPI, TWI/I2C, and an Event System for inter-peripheral signaling.

Feature Summary

• Features a flexible low-power architecture with an Event System for CPU-independent peripheral signaling.
• Includes intelligent analog subsystems such as a 12-bit differential ADC with programmable gain amplifier and window comparators.
• Supports advanced digital peripherals including Configurable Custom Logic (CCL) with Look-up Tables.
• Provides true read-while-write operation in Flash memory for uninterrupted code execution during reprogramming.

Applications

• Real-time control systems requiring high-speed analog processing
• Sensor nodes utilizing event-driven architectures
• Secondary safety monitoring applications
• Industrial and consumer appliance controllers

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 environmental and electrical specifications required for the target application environment before finalizing procurement.

Selection Notes

Select this component when designing systems that require vertical migration within the AVR EA family without code modification. Consider the 28-pin SSOP package for space-constrained PCB layouts. Evaluate the need for simultaneous host and client TWI operations or the specific analog precision offered by the differential ADC and PGA combination.

Part Context

This device belongs to the AVR EA family, which shares architectural similarities with other members like the AVR32EA32 and AVR32EA48. These devices offer full pin and feature compatibility for vertical migration. The AVR32EA28 specifically provides a balance of memory and I/O capabilities suitable for mid-range embedded applications within the broader AVR portfolio.

Replacement Considerations

AVR32EA32-E/SS, AVR32EA48-E/SS, AVR16EA28-E/SS