ATSAML21G17B-ANT

Overview

The ATSAML21G17B-ANT is a 32-bit microcontroller from the SAM L21 series, featuring an ARM Cortex-M0+ core operating at up to 48 MHz. It integrates 128 KB of in-system self-programmable Flash and 16 KB of SRAM. The device supports a supply voltage range of 1.62 V to 3.63 V and includes advanced analog peripherals such as a 12-bit ADC with 10 channels and two 12-bit DACs. Connectivity options include USB 2.0 full-speed interface, multiple SERCOM modules supporting I2C, SPI, UART, and LINbus protocols. It operates within a temperature range of -40°C to +85°C and is housed in a TQFP-48 package.

Feature Summary

• Ultra-low-power architecture consuming under 35 µA/MHz in active mode and 200 nA in Sleep mode
• Integrated Full Speed USB host and device capabilities with Event System and Sleepwalking support
• Advanced analog subsystem including 12-bit ADC, dual 12-bit DAC, operational amplifiers, and capacitive touch sensing via Peripheral Touch Controller
• Functional safety features with AES encryption engine and True Random Number Generator (TRNG)

Applications

• Battery-powered IoT sensor nodes requiring low active current consumption
• USB-enabled consumer devices and peripheral controllers
• Industrial control systems utilizing LINbus or multi-protocol serial communication
• Applications requiring hardware-accelerated security and data integrity verification

Procurement Notes

Verify the specific suffix 'ANT' corresponds to the TQFP-48 package and industrial temperature grade (-40°C to +85°C) when ordering. Confirm RoHS compliance status through official Microchip documentation prior to procurement. Ensure ESD handling procedures are followed due to the sensitivity of CMOS components. Cross-reference the latest datasheet revision for any errata affecting pinout or electrical characteristics.

Selection Notes

Select this component when a balance of moderate memory capacity and rich analog connectivity is required in a compact 48-pin form factor. It is suitable for designs needing USB connectivity without external transceivers. Consider alternative packages like QFN if board space is more critical than leaded package availability. Evaluate power management requirements against the integrated LDO regulator capabilities.

Part Context

This part belongs to the SAM L21 family of ultra-low-power microcontrollers designed for energy-efficient applications. The family shares common architectural features such as the Cortex-M0+ core and event system but varies in memory size, I/O count, and package type. The G17B variant specifically targets applications needing 128 KB Flash and 16 KB RAM with a focus on analog performance and USB integration.

Replacement Considerations

Direct pin-compatible replacements within the same package may include other SAM L21 variants with different memory sizes, such as ATSAML21G16B-ANT (64 KB Flash) or ATSAML21J17B-ANT (128 KB Flash, QFN package). Verify software compatibility and peripheral mapping before substituting. No identical cross-manufacturer equivalents are confirmed in public documentation.