ATSAMC21G18A-AUT64

Overview

The ATSAMC21G18A-AUT64 is an automotive-grade microcontroller from the Microchip SAM C21 series, featuring an ARM Cortex-M0+ core. It integrates 256 KB of self-programming flash memory and 32 KB of SRAM. The device supports a maximum clock frequency of 48 MHz within the -40°C to +85°C operating range. Key peripherals include two 12-bit ADCs with 14 channels, a 10-bit DAC, and multiple communication interfaces such as SPI, I2C, USART, LIN, and PMBus. It operates on a supply voltage between 2.7 V and 5.5 V.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Integrated Memory Protection Unit (MPU) and micro-trace buffer for enhanced code security and debugging capabilities.
• Supports single-cycle hardware multiplication for efficient digital signal processing tasks.
• Includes independent self-programming flash for EEPROM emulation functionality.

Applications

• Automotive body control modules requiring robust MCU performance.
• In-vehicle infotainment system controllers.
• Industrial automation devices operating under strict temperature conditions.
• Sensor interface units utilizing high-resolution analog-to-digital conversion.

Procurement Notes

Verify the specific suffix 'AUT64' against official Microchip documentation, as standard datasheets typically list 'AUT'. Confirm package type matches TQFP-48 specifications. Ensure compliance with RoHS directives and check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when automotive certification is mandatory alongside Cortex-M0+ efficiency. Compare memory sizes against other SAM C21 variants like ATSAMC21G17A if storage requirements differ. Evaluate peripheral counts, specifically ADC channels and timer availability, to ensure sufficient I/O for the target application without over-specifying.

Part Context

This part belongs to the SAM C21 family, designed for low-power, high-performance applications. The G-series indicates specific pin counts and peripheral sets distinct from E or J series members. The AUT suffix denotes automotive grade qualification, differentiating it from commercial variants which may have different temperature ranges or reliability standards.

FAQ

What is the maximum operating temperature for the ATSAMC21G18A-AUT?

The device is qualified for an extended industrial/automotive temperature range up to +85°C.

Does this microcontroller support CAN bus communication?

Official specifications for the G-series variant primarily list SPI, I2C, USART, LIN, and PMBus; CAN support is typically found in the J-series members of the same family.

How many analog input channels are available?

The device provides 14 channels for its dual 12-bit Analog-to-Digital Converter (ADC).