ATSAMD21E18A-AFT

Overview

The ATSAMD21E18A-AFT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 series, designed for functional safety applications. It features 256 kB of flash memory and 32 kB of SRAM, operating at a maximum clock frequency of 48 MHz. The device supports a supply voltage range of 1.62 V to 3.63 V and operates within a temperature range of -40°C to +125°C. It includes 10-channel 12-bit ADCs and a 10-bit DAC. Connectivity options include I2C, I2S, LIN, SPI, and USART interfaces. The component is housed in a 32-TQFP package and holds AEC-Q100 qualification.

Feature Summary

• Equipped with an ARM Cortex-M0+ core optimized for low-power efficiency and high code density.
• Includes advanced analog peripherals such as multiple 12-bit ADC channels and a 10-bit DAC.
• Supports robust communication protocols including I2C, SPI, USART, LIN, and I2S.
• Certified to AEC-Q100 standards for automotive reliability requirements.

Applications

• Automotive body electronics and control modules
• Industrial automation controllers
• Consumer devices requiring functional safety compliance

Procurement Notes

Verify the specific suffix 'AFT' corresponds to the 32-TQFP package and extended temperature range during procurement. Confirm that the AEC-Q100 qualification status meets your project's automotive or industrial reliability standards. Ensure compatibility with the 1.62V to 3.63V supply voltage range for your power design. Check for any recent product change notices regarding packaging or assembly sites.

Selection Notes

Select this model when 256 kB of flash and 32 kB of RAM are sufficient for the application logic. Choose the 32-TQFP package if board space allows for through-hole compatible surface mount pins. Consider the 48 MHz speed limit for real-time processing requirements. Verify that the 10 available ADC channels meet the sensor input needs without external multiplexing.

Part Context

This component belongs to the Microchip SAM D21 family, which integrates ARM Cortex-M0+ processors with extensive peripheral sets. The 'G' and 'E' variants often denote different memory sizes or pin counts within the same architectural family. This specific part targets applications needing a balance of performance, connectivity, and automotive-grade certification.

FAQ

What is the maximum operating temperature for the ATSAMD21E18A-AFT?

The device supports an extended industrial temperature range up to +125°C.

Does this MCU support USB connectivity?

No, the ATSAMD21E18A variant does not include a USB interface; it supports I2C, SPI, USART, LIN, and I2S.