ATSAMD21J18A-AZ5822

Overview

The ATSAMD21J18A-AZ5822 is a 32-bit ARM Cortex-M0+ microcontroller from Microchip Technology, designed as the host for the MXT5822TD-AB chipset. It features 256 KB of flash memory and 32 KB of SRAM, operating at a maximum clock frequency of 48 MHz. The device provides 52 I/O pins and supports supply voltages from 1.62 V to 3.6 V. It includes 20 channels of 12-bit ADC and one 10-bit DAC. Connectivity options include I2C, LINbus, SPI, UART/USART, and USB. The component is housed in a 64-TQFP package.

Feature Summary

• Acts as the dedicated host controller for the MXT5822TD-AB chipset
• Integrates advanced analog peripherals including multiple 12-bit ADCs and a 10-bit DAC
• Supports comprehensive communication interfaces such as USB, LINbus, and standard serial protocols

Applications

• Host controller integration with MXT5822TD-AB touch sensor chipsets
• Automotive embedded control systems requiring Functional Safety (FuSa) compliance
• Low-power 32-bit microcontroller applications with analog signal processing needs

Procurement Notes

Verify current availability directly with Microchip Technology or authorized distributors, as this specific suffix variant may be subject to factory special orders. Confirm that the 64-TQFP package matches your PCB footprint requirements. Ensure the design supports the specified 1.62 V to 3.6 V operating voltage range and utilizes appropriate debugging tools for the Cortex-M0+ core.

Selection Notes

Select this part when a dedicated host solution for the MXT5822TD-AB is required. It is suitable for designs needing Functional Safety (FuSa) capabilities within the SAM D21J series. Consider the 64-TQFP package constraints and the 48 MHz processing speed relative to application latency requirements. Verify compatibility with existing USB and LINbus infrastructure before finalizing the component choice.

Part Context

This component belongs to the ATSAMD21J family, which offers low-power 32-bit performance based on the ARM Cortex-M0+ core. The J-series variants typically provide higher memory capacities and additional peripheral counts compared to smaller packages. This specific model emphasizes connectivity and analog integration for specialized chipset hosting roles.

Replacement Considerations

The ATSAMD21J18A-MUT (64-QFN) and ATSAMD21J18A-AUT (64-TQFP) are functionally equivalent core devices within the same series. However, verify if the specific MXT5822TD-AB host firmware configuration is locked to the AZ5822 suffix or if generic SAM D21J firmware applies.