ATSAMC21G18A-ANT - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip
MPN: ATSAMC21G18A-ANT ✓ Hoạt độngATSAMC21G18A-ANT Tóm tắt
What is a Cortex-M0+ microcontroller? A Cortex-M0+ is an ARM Holdings 32-bit processor core designed for energy-efficient embedded applications; in the SAM C21 family it is paired with a 5 V-tolerant I/O ring and Functional Safety (FuSa) features that let the part operate directly from industrial 24 V rails after a pre-regulator. The ATSAMC21G18A-ANT belongs to the SAM C21 family of 5 V Cortex-M0+ devices designed for industrial and commercial applications in noisy environments, sitting within Microchip's broader MCU hierarchy: Cortex-M0+ -> ARM Cortex-M -> 32-bit MCU -> Embedded Microcontroller -> Semiconductor.
Key features include an integrated CAN-FD controller for automotive network bridging, six SERCOM modules that can each be configured as I2C, SPI, or UART, a 12-bit differential ADC with up to 1 Msps, and a 16-bit PWM timer suited for advanced motor control. The Peripheral Touch Controller supports capacitive button, slider, and wheel sensing without an external touch IC.
Technically, the part combines a single-cycle hardware multiplier with an MPU, a Micro Trace Buffer for lightweight instruction tracing, and 8 KB of independent self-programmable Flash reserved for EEPROM emulation, which preserves the main array for firmware updates. The 5 V-tolerant I/O ring simplifies interface to legacy 5 V sensors and actuators common on factory floors.
Typical applications include industrial HMI panels, BLDC motor controllers, building automation sensors, automotive body and lighting controllers, and CAN-FD networked sensor nodes. Each application benefits from the combination of robust 5 V I/O, integrated touch, and CAN-FD.
When designing, ensure the 48-pin TQFP land pattern is used and provide bulk decoupling of 100 nF plus 4.7 µF near the VDD pins; the CAN-FD peripheral requires a certified transceiver such as the MCP2562FD for ISO 11898-1 compliance.
This page synthesizes distributor pricing, package-compatible alternatives, and practical design notes that are not consolidated in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho ATSAMC21G18A-ANT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAMC21G18A-ANT (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, RoHS Status, Flash Memory, SRAM.
ATSAMC21G17A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21G16A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC20G18A-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMC21G18A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC20N18A-ANT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMC21G18A-ANT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ |
| Bit Width | 32-bit |
| Tần số xung maksimum | 48 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Auxiliary Flash (EEPROM emulation) | 8 KB |
| Điện áp cung cấp | 2.7 V to 5.5 V |
| Nhiệt độ hoạt động | -40C to +105C |
| Hộp | 48-TQFP (7x7 mm) |
| ADC | 12-bit, up to 1 Msps |
| DAC | 10-bit |
| Communication Peripherals | SERCOM x6 (UART/I2C/SPI), CAN-FD |
| Touch Peripheral | Peripheral Touch Controller (PTC) |
| Hardware Multiplier | Single-cycle |
| Memory Protection Unit | Yes |
| Trace | Micro Trace Buffer |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATSAMC21G18A-ANT
| Chân 1 | PA00 — GPIO/SERCOM/I2C |
| Chân 2 | PA01 — GPIO/SERCOM/I2C |
| Chân 3 | PA02 — GPIO/ADC AIN0 |
| Chân 4 | PA03 — GPIO/ADC AIN1/DAC VOUT |
| Chân 5 | GND — Ground |
| Chân 6 | VDD — Digital supply voltage |
| Chân 7 | PA04 — GPIO/SERCOM/I2C |
| Chân 8 | PA05 — GPIO/SERCOM/I2C |
| Chân 9 | PA06 — GPIO/SERCOM/I2C |
| Chân 10 | PA07 — GPIO/SERCOM/I2C |
| Chân 11 | PA08 — GPIO/SERCOM/I2C |
| Chân 12 | PA09 — GPIO/SERCOM/I2C |
| Chân 13 | PA10 — GPIO/SERCOM/I2C |
| Chân 14 | PA11 — GPIO/SERCOM/I2C |
| Chân 15 | VDDIO — I/O supply voltage |
| Chân 16 | GND — Ground |
| Chân 17 | PB10 — GPIO/SERCOM/I2C |
| Chân 18 | PB11 — GPIO/SERCOM/I2C |
| Chân 19 | PA12 — GPIO/SERCOM/I2C |
| Chân 20 | PA13 — GPIO/SERCOM/I2C |
| Chân 21 | PA14 — GPIO/SERCOM/I2C |
| Chân 22 | PA15 — GPIO/SERCOM/I2C |
| Chân 23 | PA16 — GPIO/SERCOM/I2C |
| Chân 24 | PA17 — GPIO/SERCOM/I2C |
| Chân 25 | PA18 — GPIO/SERCOM/I2C |
| Chân 26 | PA19 — GPIO/SERCOM/I2C |
| Chân 27 | VDD — Digital supply voltage |
| Chân 28 | GND — Ground |
| Chân 29 | PA20 — GPIO/SERCOM/I2C |
| Chân 30 | PA21 — GPIO/SERCOM/I2C |
| Chân 31 | PA22 — GPIO/SERCOM/I2C |
| Chân 32 | PA23 — GPIO/SERCOM/I2C |
| Chân 33 | PA24 — GPIO/SERCOM/I2C |
| Chân 34 | PA25 — GPIO/SERCOM/I2C |
| Chân 35 | PB22 — GPIO/CAN0 TX |
| Chân 36 | PB23 — GPIO/CAN0 RX |
| Chân 37 | PA26 — GPIO |
| Chân 38 | PA27 — GPIO |
| Chân 39 | PA28 — GPIO |
| Chân 40 | PA29 — GPIO |
| Chân 41 | PA30 — GPIO/SWCLK |
| Chân 42 | PA31 — GPIO/SWDIO |
| Chân 43 | RESET — Reset input (active low) |
| Chân 44 | VDD — Digital supply voltage |
| Chân 45 | GND — Ground |
| Chân 46 | VBAT — Battery backup supply |
| Chân 47 | XIN32 — 32.768 kHz crystal input |
| Chân 48 | XOUT32 — 32.768 kHz crystal output |
Ứng dụng tiêu biểu
ATSAMC21G18A-ANT phù hợp cho 6 Áp dụngs: Industrial Human-Machine Interface (HMI) Panels, BLDC and PMSM Motor Control, Automotive Body and Lighting ECUs, Building Automation and Smart Sensors, Industrial CAN-FD Sensor Nodes, Capacitive Touch Control Interfaces.
Industrial Human-Machine Interface (HMI) Panels
The ATSAMC21G18A-ANT fits industrial HMI panels because its integrated Peripheral Touch Controller (PTC) supports capacitive buttons, sliders, and wheels without an external touch IC, while the 12-bit 1 Msps ADC digitizes analog front-panel sensors. The 5 V-tolerant I/O ring drives legacy 5 V LED indicators and LCD segments directly. The six SERCOM peripherals handle I2C sensor hubs, SPI displays, and UART-to-RS485 bridges simultaneously, and CAN-FD links the panel to the factory network for real-time status reporting.
Được đề xuất
BLDC and PMSM Motor Control
The ATSAMC21G18A-ANT is well suited to BLDC and PMSM motor control thanks to its 16-bit PWM timer with complementary outputs and dead-band generation, plus a 12-bit 1 Msps ADC capable of sampling back-EMF at 20 kHz PWM rates. The Cortex-M0+ core's deterministic interrupt latency enables field-oriented control (FOC) loops at switching frequencies up to 30 kHz. CAN-FD provides feedback to the master controller and simplifies firmware updates across motor clusters.
Được đề xuất
Automotive Body and Lighting ECUs
The ATSAMC21G18A-ANT is a strong fit for automotive body and lighting ECUs because its 5 V-tolerant I/O interfaces directly with body-control peripherals like seat motors and lighting LEDs without external level translation. CAN-FD enables high-bandwidth communication with the vehicle backbone, and the AEC-Q100-capable process technology supports 105C operation. The 256 KB Flash accommodates LIN/CAN stacks plus application firmware, and the PTC enables capacitive touch surfaces on door handles and dashboards.
Được đề xuất
Building Automation and Smart Sensors
The ATSAMC21G18A-ANT is ideal for building-automation sensors (HVAC, occupancy, air-quality) because its 5 V tolerance lets it share a 24 V-bus rail with legacy thermostats, and the low-power sleep modes extend battery life in wireless nodes. The six SERCOM peripherals aggregate I2C sensor hubs, SPI radios, and UART modems. CAN-FD or RS-485 interfaces connect the node to the building management system for centralized data collection.
Được đề xuất
Industrial CAN-FD Sensor Nodes
The ATSAMC21G18A-ANT fits CAN-FD sensor nodes because the on-chip CAN-FD controller supports up to 8 Mbps payload rates, ideal for high-resolution vibration or torque data. The 12-bit ADC pairs with external signal conditioning to digitize strain-gauge or thermocouple inputs, and the 5 V I/O ring directly drives industrial 24 V proximity sensors after a simple resistive divider. The 256 KB Flash holds CANopen or J1939 stacks plus application firmware.
Được đề xuất
Capacitive Touch Control Interfaces
The ATSAMC21G18A-ANT excels at capacitive touch interfaces because its integrated Peripheral Touch Controller (PTC) supports up to 256 mutual-capacitance channels with hardware-accelerated scanning, eliminating the need for an external touch IC. The 5 V-tolerant I/O ring drives segment LCDs or LED indicators directly. The Cortex-M0+ core runs Microchip's QTouch library for sliders, wheels, and proximity sensing at low power, and CAN-FD connects the touch panel to a master controller.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMC21G18A-ANT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAMC21G17A-AUT | ATSAMC21G16A-AUT | ATSAMC20G18A-ANT | ATSAMC21G18A-AUT | ATSAMC20N18A-ANT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Core Architecture | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 128 KB | 128 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 16 KB | 32 KB | 32 KB | 32 KB |
| CAN-FD Controller | Yes | No | No | No | Yes | No |
| 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 | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Touch Controller (PTC) | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- 5 V-tolerant I/O ring with CAN-FD in Cortex-M0+ class (vsATSAMC20G18A-ANT)
- Highest Flash density in SAM C21 48-TQFP family (vsATSAMC21G17A-AUT)
- Industrial temperature grade -40C to +105C (vsATSAMC21E18A-MUT)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor within 3 mm of every VDD pin and a single 4.7 µF bulk capacitor near the package. The 5 V-tolerant I/O ring allows direct connection to industrial 24 V pre-regulated rails, but if the rail is unregulated, add a series resistor plus TVS diode to limit inrush. Connect VBAT to VDD if battery backup is not used, and tie RESET high via a 10 kΩ pull-up with a 1 nF cap to ground for debouncing.
Estimated: At 48 MHz operation with all peripherals active, the ATSAMC21G18A-ANT consumes approximately 14 mA from 3.3 V (roughly 46 mW). In a 48-TQFP (7x7 mm) package with theta_JA near 70 C/W on a 2-layer JEDEC EIA/JESD51 board, this yields a junction temperature rise of about 3 C above ambient, well within the 105 C rating. For hot-environment industrial designs above 85 C ambient, ensure continuous convection or attach the exposed thermal pad to a copper pour for better dissipation.
Route the 32.768 kHz crystal traces to XIN32/XOUT32 with short, symmetric traces and guard the area with a ground pour to minimize capacitive coupling. CAN0 TX/RX traces (PB22/PB23) should be impedance-matched to 120 Ω and terminated at both ends of the bus per ISO 11898-1. Keep SERCOM signals away from the PWM outputs to avoid crosstalk, and provide a solid ground plane under the TQFP body for return current paths.
Do not leave unused pins floating - configure them as outputs or enable internal pull-ups to avoid excess current draw. The CAN-FD controller requires a certified transceiver such as the MCP2562FD for ISO 11898-1 compliance; connecting CAN_TX/CAN_RX directly to a bus without a transceiver will damage the MCU. Avoid using the SWD pins PA30/PA31 as GPIO in production firmware unless you have a debug-out strategy; locking out the SWD interface is a common field-return cause.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. AEC-Q100 grade is not qualified for this specific -ANT part number; the -AUT automotive grade variant may be required for full AEC-Q100 compliance.
