ATSAM3N2AA-AU

Overview

The ATSAM3N2AA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 48 MHz. It features 128 KB of in-system programmable Flash memory and 16 KB of SRAM. The device includes an 8-channel, 10-bit analog-to-digital converter (ADC) and supports multiple communication interfaces including I2C, SPI, UART/USART, and IrDA. Powered by a single supply voltage ranging from 1.62 V to 3.6 V, it operates within a temperature range of -40°C to +85°C. The component is housed in a 64-pin LQFP package with 47 general-purpose input/output pins.

Feature Summary

• Integrates an ARM Cortex-M3 processor with Thumb-2 instruction set support for efficient code execution.
• Provides embedded non-volatile Flash memory for program storage and data retention without power.
• Includes hardware peripherals such as Direct Memory Access (DMA), Pulse Width Modulation (PWM), and watchdog timers.
• Supports low-power operation modes and includes built-in reset circuits for system stability.

Applications

• Industrial control systems requiring robust MCU performance
• Consumer electronics utilizing serial communication protocols
• Smart metering applications with ADC capabilities
• Embedded motor control using PWM outputs

Procurement Notes

Verify the specific suffix 'AU' confirms the industrial temperature grade and lead-free RoHS compliance status. Confirm the package type matches the required 64-LQFP footprint for PCB design. Check current availability status as part numbers may be subject to lifecycle changes or obsolescence notices from Microchip Technology. Ensure compatibility with existing firmware development tools and debuggers.

Selection Notes

Select this component when a balance of moderate Flash capacity and GPIO count is needed for cost-sensitive applications. Compare against the ATSAM3N0 series for lower memory requirements or the ATSAM3N4 series for higher performance needs. Consider the 48 MHz clock speed limitation compared to faster SAM3S or SAM3X families if real-time processing demands are high. Verify that the 1.62 V minimum supply voltage aligns with the system power architecture.

Part Context

This device belongs to the SAM3N family of 32-bit Flash microcontrollers designed for cost-effective embedded solutions. It shares pin compatibility with legacy SAM7S products and offers a subset of features found in the larger SAM3S family. The family emphasizes low power consumption and integrated analog peripherals suitable for standalone sensor interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers for direct replacement were not identified in the provided documentation. Users should consult Microchip Technology's official cross-reference guides or contact technical support for validated alternatives due to potential differences in memory size, package, or peripheral sets.