ATSAMD21G18A-AFT

Overview

The ATSAMD21G18A-AFT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, designed for functional safety applications. It operates at frequencies up to 48 MHz and features 256 KB of in-system programmable flash memory alongside 32 KB of SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes advanced analog peripherals such as 14-channel 12-bit ADCs and a 10-bit DAC. It is housed in a 48-TQFP package with an operating temperature range extending to 125°C.

Feature Summary

• Functional Safety (FuSa) compliance for automotive and industrial reliability
• High-performance ARM Cortex-M0+ processor with single-cycle hardware multiplication
• Integrated advanced analog subsystem including multiple ADC channels and a DAC
• Comprehensive connectivity suite supporting USB, SPI, I2C, UART, and LINbus

Applications

• Automotive body electronics and sensor interfaces
• Industrial control systems requiring functional safety standards
• Portable data logging devices and embedded measurement tools
• Consumer appliances with low-power processing requirements

Procurement Notes

Verify the specific suffix 'AFT' confirms the 125°C extended temperature rating and TQFP-48 packaging. Ensure the Functional Safety (FuSa) designation aligns with project certification needs. Confirm that the 1.62V–3.6V supply range matches the target power architecture. Validate that the 48 MHz maximum clock speed meets real-time processing constraints without requiring higher-frequency variants.

Selection Notes

Select this component when functional safety certification is mandatory for the application. Choose this model over standard SAM D21 variants if operation above 85°C is required. Opt for this part when 256 KB of flash is necessary for complex firmware or large data tables. Consider this MCU for designs needing integrated USB capabilities combined with high-resolution analog input channels.

Part Context

This microcontroller belongs to the SAM D21G family, which emphasizes functional safety for automotive and industrial markets. It shares architectural similarities with the broader SAM D21 series but includes specific enhancements for reliability and extended temperature operation. The device integrates the Cortex-M0+ core with specialized peripherals to support deterministic execution and robust system monitoring.

Replacement Considerations

ATSAMD21G18A-AU offers identical specifications with an 85°C temperature rating. ATSAMD21G18A-AUT provides similar features with automotive qualification. ATSAMD21G16B-AFT serves as a lower-memory alternative within the same package.