AVR32DD28-E/SS

Overview

The AVR32DD28-E/SS is an 8-bit microcontroller from the AVR DD family, featuring a 28-pin SSOP package. It utilizes an AVR CPU with hardware multiplier running at up to 24 MHz across a supply voltage range of 1.8V to 5.5V. The device includes 32 KB of in-system self-programmable Flash memory, 4 KB of SRAM, and 256 bytes of EEPROM. Key peripherals include a 12-bit differential ADC with 19 channels, a 10-bit DAC, two USARTs, SPI, TWI/I2C, and Multi-Voltage I/O (MVIO). It supports extended industrial temperature operation from -40°C to +125°C.

Feature Summary

• Multi-Voltage I/O (MVIO) capability on PORT C enables bidirectional communication between different power domains without external level shifters.
• Configurable Custom Logic (CCL) provides four programmable Look-up Tables for custom digital logic implementation independent of the CPU.
• Event System allows predictable inter-peripheral signaling and CPU-independent data transfer to reduce system latency.
• Integrated Zero-Cross Detector (ZCD) and Analog Comparator support precise timing and signal conditioning for control applications.

Applications

• Industrial control systems requiring multi-voltage domain interfacing
• Smart home appliances and IoT nodes with mixed-signal requirements
• Automotive electronics compliant with ISO 26262 functional safety standards
• Sensor interfaces utilizing high-resolution ADC and analog comparators

Procurement Notes

Verify the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'SS' denotes the SSOP package style. Confirm that the specific revision matches the required datasheet version DS40002315. Ensure design compatibility with the 1.8V to 5.5V operating voltage range and check pinout alignment for the 28-pin configuration before finalizing procurement.

Selection Notes

Select this component when 32 KB of Flash and 4 KB of SRAM are sufficient for the application code and data storage needs. Choose the AVR32DD28-E/SS over higher-memory variants if cost and pin count optimization are priorities while retaining full peripheral functionality. The extended temperature rating makes it suitable for harsh environments where standard industrial ratings are insufficient.

Part Context

This part belongs to the AVR DD family, which offers vertical migration compatibility within the series. Devices in this family share identical pinouts and features across different memory sizes, allowing designers to scale Flash and SRAM capacity without modifying hardware layouts or source code.

Replacement Considerations

AVR32DD28-I/SS serves as a direct substitute for applications not requiring extended temperature operation. For higher memory requirements, consider AVR64DD28-E/SS. Lower memory options like AVR16DD28-E/SS are compatible but offer reduced storage capacity.

FAQ

Does the MVIO feature allow communication with 5V devices?

Yes, the Multi-Voltage I/O (MVIO) on PORT C supports input thresholds compatible with 5V signals, enabling direct interfacing with 5V peripherals without level shifting circuitry.

What is the maximum clock frequency of the AVR32DD28-E/SS?

The AVR CPU runs at a maximum clock speed of 24 MHz across the entire specified supply voltage range of 1.8V to 5.5V.

How many ADC channels are available on this 28-pin device?

The AVR32DD28 variant provides access to 19 channels for its 12-bit differential Analog-to-Digital Converter (ADC).