AVR32DB28T-E/SO

Overview

The AVR32DB28T-E/SO is an 8-bit microcontroller from the AVR DB family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 32 KB of self-programmable Flash, 4 KB of SRAM, and 512 bytes of EEPROM. The device operates within a voltage range of 1.8 V to 5.5 V and supports extended industrial temperatures (-40°C to +125°C). Key peripherals include a 12-bit ADC, 10-bit DAC, three analog comparators, two zero-cross detectors, and up to three op amps. Communication interfaces consist of three USARTs, two SPIs, and two TWI/I2C modules. It utilizes Multi-Voltage I/O (MVIO) on Port C and is housed in a 28-pin SOIC package.

Feature Summary

• Multi-Voltage I/O (MVIO) capability on Port C enables direct bidirectional communication between different power domains without external level shifters.
• Integrated Analog Signal Conditioning (OPAMP) peripheral provides up to three operational amplifiers with internal resistor ladders for flexible configurations.
• Event System allows CPU-independent inter-peripheral signaling to reduce system latency and improve real-time performance.
• Configurable Custom Logic (CCL) offers programmable Look-up Tables (LUTs) for implementing custom digital logic functions.

Applications

• Industrial control systems requiring robust noise immunity and multi-voltage domain interfacing
• Smart home appliances utilizing MVIO for sensor integration across varying supply rails
• Power control applications leveraging Zero-Cross Detectors (ZCD) and Timer/Counter Type D (TCD)
• IoT devices needing low-power operation with event-driven peripheral interactions

Procurement Notes

Verify that the ordering suffix 'SO' corresponds to the SOIC-28 package and 'E' indicates the -40°C to +125°C extended temperature range. Confirm the 'T' suffix denotes tape and reel packaging if required for automated assembly. Ensure compatibility with the AVR DB family pinout for vertical migration projects. Cross-reference the datasheet DS40002301B for specific electrical characteristics and timing diagrams relevant to your operating conditions.

Selection Notes

Select this component when designing systems requiring multi-voltage I/O flexibility to interface with sensors or actuators operating at different supply levels. The inclusion of multiple analog peripherals like OPAMPs and ZCDs makes it suitable for precision measurement and power control tasks. Consider the 28-pin form factor for space-constrained designs that still demand extensive connectivity through USART, SPI, and TWI interfaces.

Part Context

This part belongs to the AVR DB family, which emphasizes high performance and low power consumption through advanced peripheral integration. The family supports vertical migration among 28, 32, and 48-pin variants with full pin and feature compatibility. The AVR32DB series specifically targets applications needing robust analog capabilities and secure, reliable operation in industrial and automotive environments.

Replacement Considerations

AVR32DB28T-E/SS (Same memory/peripherals, SSOP-28 package)

FAQ

Does the AVR32DB28T-E/SO support bidirectional level shifting?

Yes, the device features Multi-Voltage I/O (MVIO) on Port C, allowing true bidirectional communication between devices with different supply voltages without external level translators.

What is the maximum operating frequency of the CPU?

The AVR CPU runs at clock speeds up to 24 MHz.

How many analog comparators are included?

The AVR32DB28T-E/SO includes three Analog Comparators (ACs) with window compare functions.