AVR32DB28-E/SP

Overview

The AVR32DB28-E/SP is an 8-bit microcontroller from the AVR DB family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 32 KB Flash, 4 KB SRAM, and 512 B EEPROM. The device operates within a 1.8 V to 5.5 V supply range and supports -40°C to +125°C extended temperature. It utilizes a 28-pin SPDIP package and provides 22 I/O pins, a 12-bit ADC, three analog comparators, one DAC, and multi-voltage I/O capabilities.

Feature Summary

• Multi-Voltage I/O (MVIO) on Port C enables direct communication across different voltage domains without external level shifters.
• Configurable Custom Logic (CCL) allows up to four Look-Up Tables for custom digital logic implementation independent of the CPU.
• Event System facilitates predictable, low-latency peripheral-to-peripheral signaling without CPU intervention.
• Integrated Analog Signal Conditioning includes op-amps with internal resistor ladders for flexible signal processing.

Applications

• Industrial control systems requiring robust noise immunity and multi-voltage interfacing
• Smart home appliances operating in extended temperature environments
• IoT devices utilizing event-driven architectures for low-power efficiency
• Automotive applications meeting ISO 26262 functional safety standards

Procurement Notes

Verify the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'SP' indicates the SPDIP package style. Ensure the specific revision matches the datasheet DS40002301B. Confirm that the intended application environment aligns with the specified voltage and thermal limits before finalizing procurement.

Selection Notes

Select this variant when extended industrial or automotive temperature ratings are mandatory. The SPDIP package is suitable for through-hole prototyping or high-reliability manual assembly. Consider the AVR32DB28-E/SS or E/SO if surface-mount technology is preferred for automated production lines while maintaining identical electrical characteristics.

Part Context

This component belongs to the AVR DB family, which emphasizes vertical migration compatibility across pin counts. It shares architectural features with the AVR DD and EA families but offers distinct memory configurations and peripheral sets tailored for cost-sensitive yet feature-rich embedded designs.

Replacement Considerations

AVR32DB28-E/SS and AVR32DB28-E/SO are pin-compatible alternatives offering the same functionality in SSOP and SOIC packages respectively. These substitutes allow for design changes regarding footprint requirements without modifying firmware or core circuitry.

FAQ

Does the MVIO feature apply to all I/O ports?

No, Multi-Voltage I/O (MVIO) is specifically available on Port C only, allowing these pins to interface with higher voltage domains directly.

What is the maximum clock frequency supported by this MCU?

The AVR CPU runs at a maximum frequency of 24 MHz, supported by various clock options including internal oscillators and external crystals.

How many analog comparators are integrated into the AVR32DB28?

The device integrates three Analog Comparators (ACs), each capable of window compare functions for precise signal monitoring.