ATSAMD21G16B-AU

Overview

The ATSAMD21G16B-AU is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAM D21G Functional Safety (FuSa) series. It features 64KB of in-system programmable Flash memory and 8KB of SRAM. The device operates at a maximum clock frequency of 48MHz with an internal oscillator. It supports a supply voltage range of 1.62V to 3.6V and includes 38 general-purpose I/O pins. Data conversion capabilities include 14 channels of 12-bit ADC and one 10-bit DAC. Connectivity interfaces comprise I2C, LINbus, SPI, UART/USART, USB, and I2S. The component is housed in a 48-TQFP package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated functional safety compliance within the SAM D21G family architecture
• On-chip analog peripherals including multi-channel high-resolution ADC and precision DAC
• Comprehensive digital communication interface support including USB and LINbus
• Direct memory access controller for efficient data transfer management

Applications

• Industrial control systems requiring functional safety standards
• Automotive applications meeting AEC-Q100 qualification requirements
• Smart sensor nodes utilizing advanced analog signal processing
• Consumer electronics with low-power embedded control needs

Procurement Notes

Verify the specific suffix 'AU' corresponds to the commercial temperature grade (-40°C to +85°C) and TQFP packaging. Confirm that the FuSa designation aligns with your system's safety integrity level requirements. Check current datasheet revisions for any errata or design changes affecting pinout or electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this model when 64KB program storage and 8KB RAM are sufficient for the application logic. Choose over variants with higher memory if code size exceeds limits. Consider the AFT suffix variant if automotive-grade extended temperature ranges (-40°C to +125°C) are required instead of the commercial AU grade. Ensure the 48-TQFP footprint matches the PCB layout constraints.

Part Context

This component is part of the Microchip SAM D21G series, designed for cost-sensitive applications needing enhanced reliability. It shares the core architecture with other SAM D21 devices but offers specific memory configurations and safety features. The G-series typically denotes specific pin counts and peripheral sets optimized for compact designs compared to the larger J-series counterparts.

Replacement Considerations

ATSAMD21G16B-AFT provides the same memory and core specs but with an extended automotive temperature range. ATSAMD21G17A-AU offers double the Flash and RAM capacity in the same package. ATSAMD21G15B-AU is a lower-memory alternative within the same commercial temperature grade.