ATSAMC21N18A-AN - 48MHz Cortex-M0+ 256KB Flash MCU | Microchip
MPN: ATSAMC21N18A-AN ✓ AktifATSAMC21N18A-AN Ringkasan
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.
Pilihan pengganti yang segera untuk ATSAMC21N18A-AN — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Varietas dalam siri ini
Model serupa yang kompatibel dengan pengganti yang segera ATSAMC21N18A-AN (sama faktor bentuk dan kaki) — berbeza dalam Operating Temperature, GPIO Count, Package, ADC, Core.
ATSAMC21N18A-ANT
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →ATSAMC21G18A-AU
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →ATSAMC21E18A-AN
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
ATSAMC21N17A-AN
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
ATSAMV71Q20B-AABT
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
ATSAMC21N18A-AN Penilaian maksimum & Ciri-ciri Elektrik
| 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 |
| Tegangan Pemberi Arus | 2.7 V to 5.5 V |
| Suhu Operasi | -40 °C to +105 °C |
| Kemasan | 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 |
| Jenis Pemasangan | Surface Mount |
Panduan Konfigurasi Pin ATSAMC21N18A-AN 100-pin tqfp (14x14 mm)
Konfigurasi pin untuk ATSAMC21N18A-AN (100-pin tqfp (14x14 mm) pakai). IC digital ini termasuk GPIO, antaramuka komunikasi (UART, SPI, I2C), dan pin kuasa. Rujuk dokumen pengeluar untuk fungsi pin alternatif dan opsi konfigurasi. Biasa digunakan dalam rancangan sistem ter嵌入式 dan PCB.
Tiada data garisan pin yang diperoleh untuk ATSAMC21N18A-AN.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
ATSAMC21N18A-AN patut untuk 6 aplikasis: 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.
Disebarkan
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.
Disebarkan
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.
Disebarkan
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.
Disebarkan
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.
Disebarkan
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.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk ATSAMC21N18A-AN — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | 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 |
Penyeberangsung Jelas
- Industrial 5V CAN-FD integration (vsATSAMC21G18A-AU)
- Functional Safety (FuSa) documentation (vsATSAMC21E18A-AN)
- Cortex-M0+ simplicity with Cortex-M7 upgrade path (vsATSAMV71Q20B-AABT)
Catatan Desain
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.
Maklumat Kesediaan
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.
