AVR128DA28T-I/SO

Overview

The AVR128DA28T-I/SO is an 8-bit microcontroller from the AVR DA family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 128 KB of self-programmable Flash memory, 16 KB of SRAM, and 512 B of EEPROM. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports industrial temperatures from -40°C to +85°C. Key peripherals include a 12-bit ADC, 10-bit DAC, three analog comparators, and zero-cross detectors. Communication interfaces consist of USART, SPI, and TWI/I2C.

Feature Summary

• Supports vertical migration across the AVR DA family without code modification due to full pin and feature compatibility.
• Integrates intelligent analog features including a Peripheral Touch Controller (PTC) with Driven Shield+ technology for capacitive touch applications.
• Utilizes an Event System and Configurable Custom Logic (CCL) to reduce system latency and enable CPU-independent peripheral signaling.

Applications

• Industrial control systems requiring real-time processing
• Smart home appliances with capacitive touch interfaces
• IoT devices utilizing low-power sleep modes
• Power control circuits using optimized Timer/Counter Type D

Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape and reel packaging as specified in the datasheet. Confirm the 'I' suffix indicates the industrial temperature range (-40°C to +85°C). Ensure the 'SO' designation matches the required SOIC package style. Cross-reference the specific revision level of the datasheet DS40002183B during procurement to ensure component accuracy.

Selection Notes

Select this component when 128 KB of program memory and 16 KB of RAM are required within a compact 28-pin footprint. It is suitable for designs needing advanced analog capabilities like PTC or ZCD alongside standard communication interfaces. Consider the AVR DA family's single-cycle I/O access and hardware multiplier for performance-critical tasks operating up to 24 MHz.

Part Context

This part belongs to the AVR128DA28/32/48/64 series, which shares a common architecture and instruction set. Devices in this series offer horizontal and vertical migration paths, allowing designers to scale pin counts and memory sizes while maintaining software compatibility. The AVR DA family represents Microchip's latest generation of 8-bit MCUs with enhanced peripheral sets.

Replacement Considerations

AVR128DA28-I/SO

FAQ

What does the 'T' suffix indicate in the part number?

The 'T' suffix denotes that the device is supplied in Tape & Reel packaging format.

Can the AVR128DA28T-I/SO be used for capacitive touch sensing?

Yes, it integrates a Peripheral Touch Controller (PTC) supporting driven shield and boost mode technologies for buttons, sliders, and wheels.

How many general-purpose I/O pins are available on this device?

The AVR128DA28 provides 23 programmable general-purpose I/O pins.