ATSAMD51N20A-AUT

Overview

The ATSAMD51N20A-AUT is a 32-bit microcontroller from the SAM D51 family, featuring an ARM Cortex-M4F core with a maximum clock frequency of 120 MHz. It integrates 1 MB of Flash program memory and 256 KB of SRAM data RAM. The device provides 81 general-purpose I/Os and includes a 12-bit ADC with 28 channels and a 12-bit DAC. It operates within a voltage range of 1.71 V to 3.6 V and supports an industrial temperature range from -40°C to +85°C. The component is AEC-Q100 qualified and housed in a 100-TQFP package.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in demanding environments.
• Integrated floating-point unit (FPU) within the Cortex-M4F core enables efficient execution of complex mathematical algorithms.
• Comprehensive connectivity suite supporting USB, Ethernet, LINbus, SPI, I2C, and USART interfaces for versatile system integration.

Applications

• Automotive infotainment systems requiring high-speed processing and multimedia capabilities.
• Industrial motor control applications utilizing advanced PWM and analog peripherals.
• Smart energy metering devices needing precise analog-to-digital conversion and secure communication.
• IoT gateways and edge nodes requiring extensive I/O and multiple serial communication protocols.

Procurement Notes

Verify the specific suffix 'AUT' confirms automotive qualification and tape-and-reel packaging. Ensure compatibility with 3.3V logic levels across all I/O pins. Confirm that the 100-TQFP footprint matches the target PCB design. Check for any recent PCN updates regarding assembly sites or material changes. Validate that the operating temperature range meets the final application's environmental requirements.

Selection Notes

Select this part when automotive certification is mandatory alongside high-performance computing needs. Compare against non-automotive variants if cost reduction is prioritized over qualification. Consider pin-compatible alternatives within the SAM D5x/E5x family if memory size differs. Evaluate power consumption profiles against other Cortex-M4 solutions for battery-operated scenarios. Verify interface availability matches the required peripheral count without multiplexing conflicts.

Part Context

This MCU belongs to the SAM D5x/E5x family, designed for high-performance embedded control. It shares architectural similarities with the ATSAME53 series but offers distinct memory configurations. The device targets applications requiring deterministic real-time control combined with rich connectivity options.

Replacement Considerations

ATSAMD51N20A-AU-EFP

FAQ

Is the ATSAMD51N20A-AUT suitable for safety-critical automotive applications?

Yes, it is AEC-Q100 Grade 1 qualified, indicating suitability for automotive environments, though functional safety compliance depends on the specific system implementation.

What is the maximum operating voltage for the digital I/Os?

The digital I/Os are tolerant to 5V, while the core and analog supplies operate between 1.71V and 3.6V.