AVR64DB28T-I/SO

Overview

The AVR64DB28T-I/SO is an 8-bit microcontroller from the AVR DB family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 64 KB Flash, 8 KB SRAM, and 512 B EEPROM. The device operates between 1.8 V and 5.5 V in an SSOP-28 package. Key peripherals include a 12-bit ADC with 13 channels, three op amps, three ZCDs, a 10-bit DAC, and multiple communication interfaces.

Feature Summary

• Multi-Voltage I/O (MVIO) on Port C allows flexible voltage level interfacing without external components.
• Analog signal conditioning subsystem integrates three operational amplifiers with internal resistor ladders for configurable applications.
• Event System enables CPU-independent inter-peripheral signaling to reduce processing overhead and improve timing predictability.

Applications

• Power control systems utilizing Zero-Cross Detectors and TCD timers
• Industrial sensor nodes requiring high-resolution analog signal conditioning
• Battery-powered devices leveraging low-power sleep modes and efficient architecture

Procurement Notes

Verify the 'T' suffix indicates tape and reel packaging and the 'I' suffix confirms industrial temperature range (-40°C to +85°C). Confirm the 'SO' designation matches the required SOIC-28 footprint. Ensure compatibility with existing design tools and UPDI programming interfaces before finalizing procurement.

Selection Notes

Select this part for designs requiring vertical migration within the AVR DB family without code modification. Choose the SOIC package for standard surface-mount assembly processes. Consider the 13-channel ADC and integrated op amps if complex analog front-end processing is needed without external support circuitry.

Part Context

This component belongs to the AVR64DB28/32/48/64 series, sharing pinouts and features across memory variants. It utilizes the Unified Program and Debug Interface (UPDI) for single-pin programming. The device supports horizontal migration to lower pin counts or vertical scaling to higher memory sizes within the same family.

Replacement Considerations

AVR64DB28-E/SO offers extended temperature range (-40°C to +125°C). AVR64DB28-I/SS provides the same electrical characteristics in an SSOP package. AVR128DB28T-I/SO provides double the Flash and RAM while maintaining pin compatibility.

FAQ

What is the function of the 'T' suffix in the part number?

The 'T' suffix indicates that the device is supplied in tape and reel packaging format.

How does the Event System benefit peripheral interaction?

It allows peripherals to trigger actions directly without CPU intervention, reducing latency and power consumption during data transfers.