AVR64DB28-E/SS

Overview

The AVR64DB28-E/SS is an 8-bit microcontroller from the AVR DB family, featuring a hardware multiplier running at up to 24 MHz. It includes 64 KB of Flash memory, 8 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 an extended temperature range of -40°C to +125°C. Key peripherals include a 12-bit ADC with 13 channels, three analog comparators, three zero-cross detectors, a 10-bit DAC, and multiple communication interfaces such as USART, SPI, and TWI.

Feature Summary

• Multi-Voltage I/O (MVIO) on Port C allows flexible interfacing with different voltage levels.
• Analog signal conditioning subsystem integrates op amps with internal resistor ladders for complex configurations without external components.
• Event System enables CPU-independent inter-peripheral signaling for predictable real-time control.
• Configurable Custom Logic provides programmable Look-up Tables for custom digital logic implementation.

Applications

• Power control systems utilizing Zero-Cross Detectors and TCD timers
• Industrial sensor nodes requiring high-precision analog signal processing
• Secondary safety monitoring equipment in automotive or industrial environments

Procurement Notes

Verify the ordering suffix 'E' confirms the extended temperature rating (-40°C to +125°C). Confirm the '/SS' suffix indicates the SSOP-28 package style. Ensure compatibility with existing designs by checking pinout alignment against other AVR DB family members if migration is considered. Cross-reference the specific datasheet revision DS40002300B for any errata or additional constraints.

Selection Notes

Select this component when 64 KB of program memory and 8 KB of RAM are sufficient for the application requirements. The 28-pin SSOP package is suitable for designs prioritizing compact footprint over higher I/O counts. Consider the AVR64DB28-E/SS for applications needing multi-voltage I/O capabilities and advanced analog features like op amps and ZCDs within a low-power architecture.

Part Context

This device belongs to the AVR DB family, which offers vertical migration compatibility without code modification across varying pin counts and memory sizes. The AVR64DB28 variant serves as the entry point for the 64 KB Flash series in the 28-pin form factor. It shares architectural similarities with larger variants like the AVR64DB48 but with reduced peripheral channel counts due to pin limitations.

Replacement Considerations

AVR64DB28-I/SS (Industrial temperature range)

FAQ

What is the function of the MVIO feature?

Multi-Voltage I/O (MVIO) on Port C allows the selection of input voltage thresholds, enabling the pins to interface safely with external circuits operating at different voltage levels than the core supply.

How does the Event System benefit peripheral operation?

The Event System allows peripherals to communicate and trigger actions independently of the CPU, ensuring predictable timing and reducing processor load for time-critical tasks.