ATSAML21G18B-MUT

Overview

The ATSAML21G18B-MUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum clock frequency of 48 MHz. It features 256 kB of Flash program memory and 32 kB of SRAM data memory. The device includes a 12-bit ADC with 10 channels and dual 12-bit DACs. It supports multiple communication interfaces including I2C, LIN, SPI, USART, and USB Full Speed. Operating voltage ranges from 1.62 V to 3.63 V, with an industrial temperature range of -40°C to +85°C. The component is housed in a 48-pin VQFN package.

Feature Summary

• Integrates a high-performance ARM Cortex-M0+ processor with up to 48 MHz execution speed for efficient code processing.
• Provides extensive analog capabilities through a 12-bit ADC with ten input channels and two independent 12-bit DAC outputs.
• Supports versatile connectivity via integrated hardware peripherals for I2C, SPI, USART, LINbus, and USB Full Speed communication.
• Features low-power architecture with multiple sleep modes and flexible clock sources optimized for battery-operated applications.

Applications

• Portable consumer electronics requiring low power consumption and compact form factors
• Industrial control systems utilizing LINbus or standard serial communication protocols
• USB-enabled peripheral devices and human-machine interface modules
• Sensor nodes and data acquisition systems leveraging high-resolution analog-to-digital conversion

Procurement Notes

Verify the specific suffix 'MUT' corresponds to the 48-pin VQFN package and reel packaging configuration required for your assembly line. Confirm that the industrial temperature grade (-40°C to +85°C) meets your environmental specifications. Ensure compatibility with 1.62V to 3.63V supply rails during system design validation. Cross-reference the latest datasheet revision to confirm pinout consistency and electrical characteristics before finalizing procurement orders.

Selection Notes

Select this model when a balance of moderate memory capacity and rich analog peripherals is required within a small footprint. It serves as a suitable upgrade path from smaller SAML21 variants like the E-series if additional Flash or I/O count is needed. Consider alternative packages such as TQFP if surface mount constraints differ. Evaluate power consumption profiles against application duty cycles to ensure optimal battery life performance.

Part Context

This component belongs to the Microchip SAM L21 family of ultra-low-power 32-bit microcontrollers. The series is designed for applications demanding high efficiency without sacrificing processing capability. The G18B designation indicates specific memory configurations within the lineup. The family shares common architectural features and software libraries, facilitating migration between different pin counts and memory sizes within the same ecosystem.

Replacement Considerations

Direct substitutes include other SAML21 variants with compatible pinouts and memory sizes, such as ATSAML21G17B-MUT or ATSAML21J18B-MUT, provided interface and peripheral requirements align. Verify package dimensions and thermal characteristics when swapping between QFN and TQFP options. Software compatibility remains consistent across the Cortex-M0+ core family, simplifying firmware porting efforts.