ATSAMD21G15B-AU

Overview

The ATSAMD21G15B-AU is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48 MHz. It features 32 KB of in-system programmable Flash memory and 4 KB of SRAM. The device includes an advanced analog subsystem with fourteen 12-bit ADC channels and one 10-bit DAC. Connectivity options include USB, SPI, I2C, USART, LINbus, and I2S interfaces. It operates within a supply voltage range of 1.62 V to 3.63 V and supports industrial temperatures from -40°C to +85°C.

Feature Summary

• Integrates an ARM Cortex-M0+ processor for efficient code execution and low-power management.
• Provides extensive analog capabilities with multiple high-resolution ADCs and a dedicated DAC.
• Supports versatile communication protocols including USB, SPI, I2C, and USART for system integration.
• Includes functional safety features compliant with automotive reliability standards.

Applications

• Automotive infotainment and body control modules
• Industrial sensor nodes and data acquisition systems
• Consumer electronics requiring USB connectivity
• Smart home automation controllers

Procurement Notes

Verify the specific suffix 'AU' confirms the 48-TQFP package and industrial temperature grade. Confirm AEC-Q100 qualification status if automotive deployment is required. Check current production lifecycle status as Microchip may update component availability. Ensure ESD handling procedures are followed during assembly due to moisture sensitivity classification.

Selection Notes

Select this model when 32 KB of program storage and 4 KB of RAM are sufficient for application logic. Choose over variants with higher memory if complex algorithms or large data buffers are needed. Consider the 48-pin TQFP package constraints for PCB layout. Verify that the 48 MHz clock speed meets real-time processing requirements compared to faster Cortex-M4 alternatives.

Part Context

This component belongs to the SAM D21 family of 32-bit MCUs designed for cost-sensitive applications. It shares architectural similarities with other SAM D21 variants but offers specific memory and pin configurations. The family targets general-purpose embedded control and IoT applications, providing a balance between performance and power consumption.

Replacement Considerations

ATSAMD21G15A-AU: Similar specifications but may differ in qualification or manufacturing site. ATSAMD21G16B-AFT: Higher memory capacity (64 KB Flash) and extended temperature range (-40°C to 125°C). ATSAMD21E15B-AUT: Functional safety variant with different package options.