ATSAM3S1AB-AUR

Overview

The ATSAM3S1AB-AUR is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 20 MHz. It features 64 kB of flash memory and 16 kB of SRAM. The device includes eight 12-bit ADC channels, two 12-bit DAC outputs, and one analog comparator. It supports interfaces such as SPI, I2C, USART, and USB Full-Speed. Operating within a voltage range of 1.8 V to 5.5 V, it functions between -40°C and +85°C in a 48-pin LQFP package.

Feature Summary

• Integrates an ARM Cortex-M3 processor with hardware multiply and divide capabilities for efficient code execution.
• Includes a comprehensive set of peripherals including multiple timers, DMA controller, and standard communication interfaces.
• Features built-in analog components comprising multi-channel ADCs, dual DACs, and an analog comparator.
• Supports single-supply operation via an embedded voltage regulator for simplified power design.

Applications

• Industrial control systems requiring robust peripheral integration
• Consumer electronics utilizing low-power ARM processing
• Medical devices needing precise analog signal acquisition
• General-purpose embedded applications with USB connectivity

Procurement Notes

Verify the specific suffix 'AUR' indicates tape and reel packaging when ordering. Confirm the 20 MHz speed grade matches system timing requirements. Ensure the 48-pin LQFP footprint aligns with PCB layout specifications. Check RoHS compliance status if required by regional regulations. Validate supply chain authenticity through authorized Microchip distributors.

Selection Notes

Select this component for applications requiring a balance of processing power and analog capabilities within a compact form factor. The 20 MHz speed suits moderate performance needs without excessive power consumption. Consider the 64 kB flash size for firmware complexity. Evaluate the 48-pin count against I/O requirements before choosing larger packages like the 64 or 100-pin variants.

Part Context

This part belongs to the SAM3S family of 32-bit Flash MCUs based on the ARM Cortex-M3 core. It offers pin-to-pin compatibility with other SAM3S variants differing primarily in memory size and pin count. The series targets cost-sensitive applications requiring reliable performance and extensive peripheral sets for embedded control tasks.

Replacement Considerations

ATSAM3S1AA-AU: Same core and memory but in QFP-48 package.

FAQ

What is the maximum operating frequency of the ATSAM3S1AB-AUR?

The maximum operating frequency is 20 MHz.

Does this MCU include digital-to-analog converters?

Yes, it integrates two 12-bit DAC channels.