AVR128DA28-E/SP

Overview

The AVR128DA28-E/SP is a microcontroller from the AVR DA family, featuring an AVR CPU with hardware multiplier running at up to 24 MHz. It includes 128 KB of Flash memory, 16 KB of SRAM, and 512B of EEPROM. The device is housed in a 28-pin SPDIP package and supports an extended temperature range of -40°C to +125°C. Key peripherals include one 16-bit TCA, three 16-bit TCBs, one 12-bit TCD, one RTC, three USARTs, two SPIs, one TWI/I2C, a 12-bit ADC with 10 channels, one DAC, three analog comparators, one ZCD, and a Peripheral Touch Controller with 18 self-capacitance and 81 mutual capacitance channels.

Feature Summary

• Features a flexible low-power architecture with an Event System for CPU-independent inter-peripheral signaling.
• Includes intelligent analog features such as a 12-bit differential ADC, analog comparators, and a Peripheral Touch Controller with Driven Shield+ technology.
• Supports single-pin Unified Program and Debug Interface (UPDI) for simplified programming and debugging.
• Offers vertical migration compatibility within the AVR DA family without code modification.

Applications

• Industrial control systems requiring robust I/O and touch interfaces
• Smart home appliances with capacitive touch controls
• Battery-powered devices utilizing low-power sleep modes
• Motor control applications using optimized timer peripherals

Procurement Notes

Verify the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'SP' indicates the SPDIP package style. Ensure the part number matches the specific pin count variant required for your design. Cross-reference the datasheet revision to confirm all electrical characteristics and peripheral counts align with your system requirements before finalizing procurement.

Selection Notes

Select this component when 128 KB of Flash and 16 KB of SRAM are necessary for complex firmware. The 28-pin SPDIP package is suitable for through-hole assembly or prototyping. Consider the extended temperature rating if the operating environment exceeds industrial limits. Verify that the available GPIOs and peripheral counts meet the application's connectivity needs without requiring additional external components.

Part Context

This device belongs to the AVR DA family, which provides horizontal and vertical migration paths. The AVR128DA28 shares the same core architecture and software compatibility with other DA series devices like the AVR128DA32, AVR128DA48, and AVR128DA64. This allows designers to scale pin counts and peripheral resources while maintaining code portability across the family.

Replacement Considerations

Direct substitutes within the same package and temperature range include other AVR128DA28 variants with different suffixes for package type (e.g., SSOP, SOIC). For pin-compatible upgrades with more peripherals, consider the AVR128DA32, AVR128DA48, or AVR128DA64. Ensure any replacement maintains the required extended temperature rating and SPDIP form factor.

FAQ

What is the maximum operating frequency of the AVR128DA28?

The AVR CPU runs at up to 24 MHz.

Does the AVR128DA28 support capacitive touch sensing?

Yes, it includes a Peripheral Touch Controller (PTC) with up to 18 self-capacitance and 81 mutual capacitance channels.

How many General Purpose I/O pins are available on the 28-pin version?

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