ATSAMC21N18A-AN - 48MHz Cortex-M0+ 256KB Flash MCU | Microchip
Teilenummer: ATSAMC21N18A-AN ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.77 | $5,77 |
| 10 | $5.19 | $51,90 |
| 100 | $4.61 | $461,00 |
| 500 | $4.14 | $2.070,00 |
| 1.000 | $3.69 | $3.690,00 |
ATSAMC21N18A-AN Übersicht
An ARM Cortex-M0+ microcontroller is a low-power 32-bit processor core based on the Armv6-M architecture with single-cycle hardware multiplication, a Micro Trace Buffer, and an optional Memory Protection Unit (MPU). It belongs to the broader embedded hierarchy: microcontroller -> microprocessor -> integrated circuit -> semiconductor. Cortex-M0+ devices are commonly used as the central processing element in motor control, industrial sensing, and connected-edge systems where deterministic real-time response and low energy are required.
Key features include six SERCOM channels, each independently configurable as UART, SPI, or I²C, plus one CAN-FD controller, a 12-bit 1 Msps ADC with up to 16 channels, two 16-bit timers plus a 24-bit timer/counter, and a Peripheral Touch Controller (PTC) supporting capacitive-touch sensing. The device also integrates an 8 KB independent Flash bank for EEPROM emulation, full-speed USB 2.0 with embedded PHY, and a 12-bit DAC.
The ATSAMC21N18A-AN is built on a low-power CMOS process with multiple sleep modes (IDLE, STANDBY, OFF) and integrates functional-safety (FuSa) documentation for safety-critical designs. The 100-pin TQFP package exposes up to 84 GPIO pins plus dedicated analog and timer pins, supporting integration of mixed-signal front ends without external glue logic.
Typical applications include industrial sensor hubs, building-automation controllers, motor-control front ends, automotive body and chassis ECUs, smart energy meters, and CAN-FD networked nodes. The combination of 5 V tolerance on digital I/O, integrated CAN-FD, and functional-safety documentation makes the device a strong fit for noisy industrial bus environments where 3.3 V-only MCUs are unreliable.
When designing with this device, place a 1 µF decoupling capacitor adjacent to each power pin, follow the trace-length guidelines for the ADC analog supply (AVDD), and use MPLAB X IDE or Microchip Studio with the MPLAB Harmony code configurator to generate peripheral drivers. A 32.768 kHz crystal is recommended for accurate RTC timing when the internal low-power RC oscillator is insufficient.
This page consolidates distributor stock, parametric drop-in alternatives, and PCB design guidance not assembled in the manufacturer data sheet, giving procurement and embedded engineers an actionable reference for the ATSAMC21N18A-AN.
Drop-in-Alternativen für ATSAMC21N18A-AN – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ATSAMC21N18A-AN (gleiche Bauform und Footprint) – abweichend in Operating Temperature, GPIO Count, Package, ADC, Core.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ATSAMC21N18A-ANT
✅ Drop-In✓ Auf Lager
$4.12 / Stück
Datenblatt ansehen →ATSAMC21G18A-AU
✅ Drop-In✓ Auf Lager
$3.05 / Stück
Datenblatt ansehen →ATSAMC21E18A-AN
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
ATSAMC21N17A-AN
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
ATSAMV71Q20B-AABT
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ATSAMC21N18A-AN Grenzwerte & elektrische Eigenschaften
| Core Architecture | ARM Cortex-M0+ (Armv6-M) |
| Maximum CPU Clock | 48 MHz |
| Flash Memory | 256 KB |
| EEPROM Emulation Flash | 8 KB (independent bank) |
| SRAM | 32 KB |
| Versorgungsspannung | 2.7 V to 5.5 V |
| Betriebstemperatur | -40 °C to +105 °C |
| Gehäuse | 100-pin TQFP (14x14 mm) |
| GPIO Count | Up to 84 |
| SERCOM Channels | 6 (UART/SPI/I²C configurable) |
| CAN-FD Controller | 1 |
| ADC | 12-bit, up to 1 Msps, up to 16 channels |
| DAC | 12-bit, 1 channel |
| Timers | Two 16-bit, one 24-bit |
| Peripheral Touch Controller (PTC) | Yes (capacitive touch) |
| USB | Full-speed USB 2.0 with embedded PHY |
| Functional Safety (FuSa) | Yes |
| Montageart | Surface Mount |
ATSAMC21N18A-AN 100-pin tqfp (14x14 mm) Pinbelegungsleitfaden
Pinbelegung für ATSAMC21N18A-AN (100-pin tqfp (14x14 mm)-Gehäuse). Dieser digitale IC umfasst GPIO, Kommunikationsschnittstellen (UART, SPI, I2C) und Versorgungspins. Alternative Pin-Funktionen und Konfigurationsoptionen entnehmen Sie dem Herstellerdatenblatt. Unverzichtbar für Embedded-System-Design und PCB-Layout.
Keine detaillierten Pinbelegungsdaten verfügbar für ATSAMC21N18A-AN.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
ATSAMC21N18A-AN ist geeignet für 6 Anwendungs: Industrial CAN-FD Networked Sensor Hub, Building Automation Controller, Automotive Body and Chassis ECU, Smart Energy Meter and Submeter, Motor Control Front End (FOC), USB-Capable Industrial Data Logger.
Industrial CAN-FD Networked Sensor Hub
The ATSAMC21N18A-AN is purpose-built for industrial CAN-FD sensor hubs where 5 V tolerance and bus robustness are mandatory. Its integrated CAN-FD controller compliant with ISO 11898-1:2015 supports 64-byte frames and higher bit rates than classical CAN, reducing bus traffic for sensor arrays. The six SERCOM channels accept UART, SPI, or I²C sensor inputs simultaneously, and the 12-bit 1 Msps ADC handles up to 16 analog channels for thermocouples, pressure transducers, or 4-20 mA loops. The 256 KB Flash and 32 KB SRAM accommodate protocol stacks plus local DSP-style filtering. Functional-safety (FuSa) documentation supports integration into safety-related industrial nodes per IEC 61508.
Empfohlen
Building Automation Controller
In HVAC and lighting controllers, the ATSAMC21N18A-AN combines 84 GPIO with 5 V tolerance to drive triacs, relays, and 0-10 V dimming interfaces directly. The Peripheral Touch Controller (PTC) supports capacitive touch panels for wall switches and thermostats without external touch ICs. The 2.7-5.5 V supply rail accepts 24 V industrial bus power after a small buck regulator. CAN-FD or RS-485 (via SERCOM) connects the controller to a building automation backbone, while the 12-bit DAC drives analog setpoint outputs. The -40 °C to +105 °C operating range covers unheated equipment rooms and rooftop enclosures.
Empfohlen
Automotive Body and Chassis ECU
The ATSAMC21N18A-AN suits body controllers, mirror modules, and lighting ECUs that require CAN-FD connectivity and 5 V I/O for sensor interfaces. AEC-Q100 grade 1 qualification (qualified to -40 °C to +125 °C in some SAM C21 variants) supports underhood and cabin modules. The 100-pin TQFP package provides sufficient GPIO for motor-driver PWM outputs, switch-matrix inputs, and LIN/UART communication to smart actuators. Functional-safety (FuSa) documentation assists ISO 26262 ASIL-A/B system designs. The Cortex-M0+ core delivers deterministic interrupt latency for body-control loops under 10 µs.
Empfohlen
Smart Energy Meter and Submeter
In single-phase and three-phase energy meters, the ATSAMC21N18A-AN delivers the computational headroom for metrology algorithms while integrating the analog front end. Up to 16 channels of 12-bit ADC at 1 Msps sample current and voltage CTs/shunts simultaneously, and the 12-bit DAC calibrates offset drift over temperature. The RTC with 32.768 kHz crystal option provides accurate time-of-use billing. CAN-FD or PLC connectivity reports to a concentrator, while 256 KB Flash stores tariff tables and 90-day load profiles. The wide -40 °C to +105 °C range covers outdoor metering cabinets.
Empfohlen
Motor Control Front End (FOC)
The ATSAMC21N18A-AN functions as the sensing and communication front end for low-power BLDC or PMSM motor drives. The 12-bit ADC samples back-EMF or current-shunt signals with hardware triggering synchronized to a TC channel for field-oriented control. Six SERCOM channels drive encoder interfaces, while CAN-FOR open CANopen or CiA 402 profiles for industrial servo communication. The 24-bit timer/counter generates center-aligned PWM with dead-time control for three-phase inverter bridges. Note: heavy computation is delegated to a co-processor or FPGA; this MCU handles the analog/communication side.
Empfohlen
USB-Capable Industrial Data Logger
The integrated full-speed USB 2.0 PHY with embedded transceiver lets the ATSAMC21N18A-AN act as a USB device for local configuration, log download, or firmware update. 256 KB Flash stores several months of process data, and the 12-bit ADC samples 4-20 mA analog inputs. CAN-FD or RS-485 (via SERCOM) connects to the plant network, while USB presents a virtual COM port for engineering tools. The 100-pin TQFP package supports PCB layouts with isolated analog and digital ground planes, improving ADC accuracy in noisy industrial cabinets.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ATSAMC21N18A-AN – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ATSAMC21N18A-ANT | ATSAMC21G18A-AU | ATSAMC21E18A-AN |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (14x14 mm) | 100-TQFP (14x14 mm) - same | 64-LQFP - smaller | 100-TQFP (14x14 mm) - same |
| Core | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB |
| GPIO | 84 | 84 | 52 | 84 |
| CAN-FD | Yes | Yes | Yes | Yes |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
Wichtigste Unterscheidungsmerkmale
- Industrial 5V CAN-FD integration (vs. ATSAMC21G18A-AU)
- Functional Safety (FuSa) documentation (vs. ATSAMC21E18A-AN)
- Cortex-M0+ simplicity with Cortex-M7 upgrade path (vs. ATSAMV71Q20B-AABT)
Designhinweise
Place a 1 µF X7R ceramic decoupling capacitor adjacent to each VDD pin and a bulk 10 µF capacitor near the regulator output. The AVDD analog supply pin should be filtered with a ferrite bead or pi-filter (10 Ω + 1 µF) and decoupled locally with 100 nF to reduce ADC noise coupling from digital switching. Estimated: at 48 MHz active mode and 3.3 V supply, typical current draw is under 10 mA per the SAM C21 family data sheet, so power-rail sizing of 50 mA is sufficient headroom.
Route the 100-pin TQFP with a 4-layer PCB stack-up: top signal, inner ground, inner power, bottom signal. Keep the exposed thermal pad (if present in the package variant) soldered to a 1 square inch copper pour for thermal dissipation. Maintain trace length under 25 mm for the 48 MHz HSE crystal traces and surround them with a ground pour to limit EMI. SERCOM and CAN-FD lines benefit from 33 Ω series-termination resistors at the driver end.
Do not assume the bootloader is pre-flashed - the ATSAMC21N18A-AN ships blank and requires programming via SWD or the Microchip SAM-BA bootloader through USB. Avoid sharing ADC channels with high-current switching nodes; use separate analog and digital ground planes joined at a single point near the MCU. The 5 V tolerance applies only to digital I/O; do not apply 5 V to ADC reference pins. Estimated: applying 5 V to AVDD beyond 5.5 V will damage the analog front end.
Compliance-Informationen
RoHS and REACH compliance confirmed by Microchip product page. AEC-Q100 not explicitly qualified for the AN variant; SAM C21 family supports industrial -40 to +105 °C grades.
