ATSAM3S2BA-AU

Overview

The ATSAM3S2BA-AU is a 32-bit microcontroller from the Microchip SAM3S series, featuring an ARM Cortex-M3 core operating at up to 64 MHz. It integrates 128 KB of flash memory and 32 KB of SRAM within a 64-LQFP package. The device supports a supply voltage range of 1.62 V to 3.6 V and includes multiple communication interfaces such as USB, SPI, I2C, and UART. It also provides analog capabilities with ten 12-bit ADC channels and two 12-bit DAC channels.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit execution
• Includes built-in full-speed USB device interface for connectivity
• Provides flexible peripheral set including DMA, PWM, and watchdog timer
• Features mixed-signal conversion with dedicated ADC and DAC channels

Applications

• USB-enabled embedded control systems
• Industrial automation controllers
• Consumer electronics devices
• General-purpose IoT nodes

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm pinout and electrical characteristics match your design requirements. Ensure compatibility with existing PCB footprints and power supply rails before procurement. Confirm that the selected packaging aligns with your assembly line capabilities and handling procedures.

Selection Notes

Select this component when a balance of processing power and peripheral richness is required in a compact form factor. The 64-pin LQFP package offers sufficient I/O for moderate complexity designs. Consider the internal oscillator accuracy and available timer resources relative to your timing constraints and sensor interface needs.

Part Context

This part belongs to the SAM3S family, designed for cost-sensitive applications requiring ARM Cortex-M3 performance. It serves as a mid-range solution within Microchip's portfolio, bridging the gap between lower-end 8/16-bit MCUs and higher-performance SAM4 series devices. The family emphasizes low power consumption and integrated connectivity options.

Replacement Considerations

ATSAM3S2BA-AUR is the tape-and-reel equivalent of this tray-packaged unit. Other SAM3S variants may offer different memory sizes or pin counts but require careful verification of register compatibility and physical footprint alignment.