ATSAMD21E18A-AF

Overview

The ATSAMD21E18A-AF is an ARM microcontroller from the SAMD21 series, featuring an ARM Cortex-M0+ core. It integrates 256 kB of Flash program memory and 32 kB of SRAM data RAM within a TQFP-32 package. The device supports a maximum clock frequency of 48 MHz and operates on a supply voltage range of 1.62 V to 3.63 V. It includes 26 I/O pins, a 12-bit ADC with 10 channels, and a 10-bit DAC. The component is qualified under AEC-Q100 standards and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Automotive-grade reliability certified by AEC-Q100 qualification for robust performance in demanding environments.
• Extended industrial temperature operation capability spanning from -40°C to +125°C for harsh condition stability.
• Integrated analog peripherals including a 12-bit ADC and a 10-bit DAC for precise signal processing.

Applications

• Automotive electronic control units requiring high thermal tolerance
• Industrial sensor interfaces utilizing analog-to-digital conversion
• Embedded systems operating in extreme environmental conditions

Procurement Notes

Verify the specific suffix 'AF' corresponds to the TQFP-32 package and the +125°C extended temperature grade during sourcing. Confirm AEC-Q100 automotive qualification status matches project requirements. Ensure compatibility with the 1.62 V to 3.63 V supply voltage range for target circuit design.

Selection Notes

Select this variant when automotive-grade durability and wide temperature operation are mandatory. The TQFP-32 package offers a balance of pin count and footprint for compact designs. Consider the 256 kB Flash capacity for complex firmware needs. Verify that the 26 available I/O pins meet interface requirements without needing higher-pin-count alternatives.

Part Context

This part belongs to the Microchip SAMD21 family, which utilizes the ARM Cortex-M0+ architecture. The 'E' designation indicates the specific memory configuration and pin count tier within the series. The 'AF' suffix distinguishes it from other packages or temperature grades, specifically denoting the TQFP-32 form factor and extended temperature rating.

Replacement Considerations

ATSAMD21E18A-AFT shares identical electrical specifications but uses a Tape & Reel packaging format instead of trays. ATSAMD21E18A-AU offers the same core functionality but is rated for a commercial temperature range of up to +85°C rather than the extended +125°C limit.