ATSAMD21G16B-AFT

Overview

The ATSAMD21G16B-AFT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAM D21G series with Functional Safety (FuSa) certification. It features 64KB of Flash memory and 8KB of SRAM, operating at a maximum frequency of 48MHz. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. It offers 14-channel 12-bit ADCs and one 10-bit DAC. Connectivity options include I2C, LINbus, SPI, USART, and USB interfaces. The component is housed in a 48-TQFP package and is rated for an industrial temperature range of -40°C to 125°C.

Feature Summary

• Functional Safety (FuSa) certified for automotive applications under AEC-Q100 standards
• Integrated advanced analog peripherals including multiple high-resolution ADCs and a DAC
• Supports comprehensive communication protocols such as USB, LINbus, SPI, I2C, and USART
• Includes hardware security features and peripheral management units like DMA and WDT

Applications

• Automotive body electronics and control modules requiring functional safety compliance
• Industrial automation systems utilizing LINbus or CAN-compatible interfaces
• Consumer devices requiring low-power operation with USB connectivity
• Smart sensors and actuators needing precise analog signal processing

Procurement Notes

Verify the specific suffix 'AFT' corresponds to the 48-TQFP package and 125°C extended temperature grade. Confirm AEC-Q100 qualification status for automotive deployment requirements. Check current datasheet revisions for any errata related to USB or clock configuration. Ensure sourcing channels provide genuine Microchip Technology products to maintain FuSa integrity.

Selection Notes

Select this model when functional safety certification is mandatory for the application. Choose over standard SAMD21 variants if automotive reliability standards are required. Consider the 48-TQFP package constraints for PCB layout and thermal management. Evaluate pin count availability against interface requirements before choosing between G16 and higher-memory G17/G18 variants.

Part Context

This component is part of the SAM D21G family, specifically designed for functional safety applications within the broader SAM D21 MCU portfolio. It shares architectural similarities with other Cortex-M0+ MCUs but distinguishes itself through FuSa documentation and automotive-grade testing. The G16 variant provides a balance of memory and performance for cost-sensitive automotive and industrial designs.

Replacement Considerations

ATSAMD21G16B-MU: Same electrical specifications and functionality but in a 48-QFN package instead of TQFP. Requires re-evaluation of footprint and thermal dissipation characteristics during substitution.