ATSAM3N4CA-AU

Overview

The ATSAM3N4CA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 48MHz. It features 256KB of in-system programmable Flash memory and 24KB of SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options comprise I2C, IrDA, SPI, and UART/USART interfaces. Peripheral functions include DMA, power-on reset, PWM, watchdog timer, and brown-out detection/reset. Data conversion capabilities consist of sixteen 10-bit ADC channels and one 10-bit DAC. The component is housed in a 100-TFBGA package with dimensions of 9x9mm.

Feature Summary

• Integrates a high-performance 32-bit ARM Cortex-M3 processor with Thumb-2 instruction set support
• Provides substantial non-volatile storage via 256KB of in-system programmable Flash memory
• Supports multiple communication protocols including I2C, SPI, and USART for versatile system integration
• Includes dedicated analog peripherals such as a multi-channel ADC and a DAC for signal processing

Applications

• Industrial control systems requiring robust data acquisition
• Consumer electronics utilizing serial communication interfaces
• Embedded applications needing low-power operation modes
• General-purpose automation controllers

Procurement Notes

Verify the specific package variant, as datasheets may list both TFBGA and LQFP options for the base series. Confirm that the 100-TFBGA (9x9) footprint matches your PCB design constraints. Ensure compatibility with the 1.62V to 3.6V supply voltage range for your target application environment. Check for any specific revision markings or engineering samples if sourcing from secondary distributors.

Selection Notes

Select this component when a balance of moderate Flash capacity and extensive I/O count is required within a compact BGA package. It is suitable for designs prioritizing the Cortex-M3 architecture's efficiency over higher clock speeds found in other SAM3 series variants. Consider the available peripheral set, particularly the number of ADC channels and serial interfaces, against system requirements before finalizing the choice.

Part Context

This microcontroller belongs to the Atmel SAM3N series, which is designed for cost-sensitive embedded applications. The series utilizes the ARM Cortex-M3 core to deliver efficient code execution while maintaining low power consumption. The SAM3N family offers various memory configurations and package options to accommodate different design complexities and form factor constraints.

Replacement Considerations

ATSAM3N4CA-CU: Same core and memory but in TFBGA package. ATSAM3N1CB-AU: Lower Flash capacity (64KB) in LQFP package. ATSAM3N2BA-AU: Lower Flash capacity (128KB) in LQFP package.