ATSAML21E18B-MNT

Overview

The ATSAML21E18B-MNT is an ARM microcontroller from the SAML21 series, featuring an ARM Cortex-M0+ core with a maximum clock frequency of 48 MHz. It integrates 256 kB of Flash program memory and 32 kB of SRAM data RAM within a VQFN-64 package. The device supports a supply voltage range of 1.62 V to 3.63 V and operates between -40°C and +85°C. Key peripherals include a 12-bit ADC with 20 channels, a 12-bit DAC, and interfaces such as I2C, LIN, SPI, USART, and USB.

Feature Summary

• Integrates high-resolution analog conversion capabilities with a 12-bit ADC supporting up to 20 input channels for precise signal acquisition.
• Includes a dedicated 12-bit digital-to-analog converter (DAC) for generating accurate analog output signals.
• Supports multiple communication protocols including I2C, LIN, SPI, USART, and USB for versatile system connectivity.
• Features an ARM Cortex-M0+ processor core optimized for low-power embedded applications requiring efficient code execution.

Applications

• Industrial control systems requiring robust communication interfaces like LIN and SPI.
• Sensor nodes utilizing the multi-channel ADC for environmental or process monitoring.
• Embedded devices needing USB connectivity for configuration or data transfer.
• Applications demanding low-power operation within the specified industrial temperature range.

Procurement Notes

Verify the specific suffix 'MNT' corresponds to the VQFN-64 package and reel/cut-tape packaging format. Confirm that the 256 kB Flash variant matches the design requirements, as other SAML21 variants offer different memory sizes. Ensure compatibility with the 1.62 V to 3.63 V supply voltage range for the target application circuitry.

Selection Notes

Select this component when 256 kB of non-volatile memory and 32 kB of RAM are required alongside a high channel count ADC. The VQFN-64 package is suitable for designs prioritizing pin density in a compact footprint. Consider the 48 MHz processing speed sufficient for the intended algorithmic load while maintaining low power consumption characteristics inherent to the Cortex-M0+ architecture.

Part Context

This part belongs to the Microchip SAML21 family of ARM-based microcontrollers designed for low-power applications. It shares the same core architecture and peripheral set as other SAML21 variants but differs in memory capacity and package type. The E18 designation typically indicates the 256 kB Flash configuration within this series.

Replacement Considerations

Direct substitutes within the SAML21 series include ATSAML21E18B-MUT (VQFN-32 package) or ATSAML21J18B-MNT (VQFN-64 package with higher I/O count). Verify pin compatibility and memory requirements before substituting, as package dimensions and available GPIOs vary significantly across these options.