ATSAMD51G18A-MFT - 120MHz Cortex-M4F MCU, 256KB Flash | Microchip
MPN： ATSAMD51G18A-MFT ✓ 啟用中ATSAMD51G18A-MFT 概覽
An ARM Cortex-M4 microcontroller is a 32-bit core that combines deterministic real-time behavior with DSP extensions and an optional single-precision FPU. It sits in the hierarchy: Cortex-M4F core -> ARM Cortex-M family -> ARMv7-M architecture -> 32-bit embedded processor -> microcontroller. Compared to Cortex-M0/M0+ parts, the M4 adds hardware MAC, SIMD instructions and FPU, enabling floating-point control loops and DSP tasks that would otherwise require a Cortex-M7 or external DSP.
Key features of the ATSAMD51G18A-MFT include: 120 MHz max core clock, 256 KB Flash with ECC and RWW support, 256 KB SRAM with ECC, a full-speed USB 2.0 device/host, up to 51 GPIO, a 12-bit 1 Msps ADC, two 12-bit DACs, and the SERCOM peripheral scheme (configurable UART/SPI/I2C/RS485). The Cortex-M4F DSP extension allows single-cycle MAC and SIMD, and the FPU handles single-precision floats. Power management integrates an on-chip DCDC buck converter and POR/BOD with brown-out reset.
Technical depth: the dual-panel Flash architecture allows one bank to be updated while the other executes, enabling in-field firmware upgrade without downtime. ECC on both Flash and SRAM protects against bit-flips in harsh environments. Peripheral interconnect uses Microchip's AHB/APB matrix; SERCOM channels can be routed to multiple GPIO pins for layout flexibility. The on-chip DCDC supplies the core domain from the 3.3 V system rail, reducing external components.
Typical applications include industrial sensor hubs, USB-CDC data loggers, motor-control subsystems (FOC and PID loops), audio effects processors, and IoT edge nodes with TLS offload. The combination of deterministic Cortex-M4F latency and rich analog (1 Msps ADC, 12-bit DAC) is well-suited to mixed-signal designs.
Design consideration: place the exposed pad with at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) to a 1 oz inner copper pour to keep the junction below 100C at 120 MHz; bypassing the V2A/V2B DCDC pin pair requires the inductor plus low-ESR ceramic per the manufacturer reference schematic.
This page consolidates verified distributor pricing, drop-in pin-compatible alternatives, and practical PCB-thermal design notes not found in a single location on the manufacturer datasheet.
直接替換替代品，適用於 ATSAMD51G18A-MFT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMD51G18A-MFT （相同外形與佔位） — 差異在於 Package, USB, SRAM, DAC, Operating Temperature.
SAME51G18A-MFT
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMD51G18A-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD51G18A-MF
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD51G18A-MFT 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M4F (32-bit) |
| Maximum CPU Frequency | 120 MHz |
| Floating Point Unit | Yes (single-precision) |
| DSP Extensions | Yes (single-cycle MAC, SIMD) |
| Flash Memory | 256 KB (dual-panel with ECC) |
| SRAM | 256 KB (with ECC) |
| Operating Voltage | 1.71 V to 3.6 V |
| USB Interface | USB 2.0 Full Speed (Device/Host) |
| ADC | 12-bit, up to 1 Msps |
| DAC | 2x 12-bit |
| GPIO Count | Up to 51 |
| SERCOM Channels | Configurable UART/SPI/I2C/RS485 |
| 封裝 | 48-pin QFN (7x7 mm) with exposed pad |
| 工作溫度 | -40C to +125C (industrial extended) |
| Packaging | Tape and Reel (suffix MFT) |
ATSAMD51G18A-MFT 腳位配置
| 腳位 1 | PA00 — GPIO / XIN (external clock input) |
| 腳位 2 | PA01 — GPIO / XOUT (external clock output) |
| 腳位 3 | GND — Ground |
| 腳位 4 | VDDIO — I/O supply voltage |
| 腳位 5 | PA02 — GPIO / ADC input |
| 腳位 6 | PA03 — GPIO / ADC reference |
| 腳位 7 | VBUS — USB VBUS detect |
| 腳位 8 | DM — USB D- line |
| 腳位 9 | DP — USB D+ line |
| 腳位 10 | VDDUSB — USB transceiver supply |
| 腳位 11 | GND — Ground |
| 腳位 12 | PA04 — GPIO / ADC input |
| 腳位 13 | PA05 — GPIO / DAC output |
| 腳位 14 | PA06 — GPIO / DAC output |
| 腳位 15 | PA07 — GPIO |
| 腳位 16 | PA08 — GPIO / I2S |
| 腳位 17 | PA09 — GPIO |
| 腳位 18 | PA10 — GPIO |
| 腳位 19 | PA11 — GPIO |
| 腳位 20 | GND — Ground |
| 腳位 21 | PA12 — GPIO |
| 腳位 22 | PA13 — GPIO |
| 腳位 23 | PA14 — GPIO |
| 腳位 24 | PA15 — GPIO |
| 腳位 25 | PA16 — GPIO |
| 腳位 26 | PA17 — GPIO |
| 腳位 27 | PA18 — GPIO |
| 腳位 28 | PA19 — GPIO |
| 腳位 29 | VDDIO — I/O supply voltage |
| 腳位 30 | PA20 — GPIO |
| 腳位 31 | PA21 — GPIO |
| 腳位 32 | PA22 — GPIO |
| 腳位 33 | PA23 — GPIO |
| 腳位 34 | PA24 — GPIO |
| 腳位 35 | PA25 — GPIO |
| 腳位 36 | RESET — Reset input (active low) |
| 腳位 37 | SWDIO — Serial Wire Debug I/O |
| 腳位 38 | SWCLK — Serial Wire Debug clock |
| 腳位 39 | GND — Ground |
| 腳位 40 | VDDANA — Analog supply voltage |
| 腳位 41 | PB00 — GPIO |
| 腳位 42 | PB01 — GPIO |
| 腳位 43 | PB02 — GPIO |
| 腳位 44 | PB03 — GPIO |
| 腳位 45 | PB04 — GPIO |
| 腳位 46 | PB05 — GPIO |
| 腳位 47 | PB06 — GPIO |
| 腳位 48 | PB07 — GPIO |
典型應用
ATSAMD51G18A-MFT 適用於 6 應用s: Industrial Sensor Hub with USB Interface, Motor Control (BLDC / FOC), USB Data Logger, Audio DSP Effects Processor, IoT Edge Node with TLS Offload, Precision Measurement Instrument.
Industrial Sensor Hub with USB Interface
The ATSAMD51G18A-MFT is well-matched to industrial sensor hubs thanks to its on-chip USB 2.0 Full Speed controller and 51 GPIO. The USB interface provides CDC-ACM or HID connectivity to a host PC, while SERCOM channels handle UART/I2C/SPI sensor backhaul. The 12-bit 1 Msps ADC simultaneously samples multiple analog sensors with deterministic timing; with 256 KB SRAM and ECC the MCU buffers raw data locally before forwarding it over USB. The extended -40C to +125C temperature range the MFT suffix designates makes it acceptable for unheated factory cabinets.
推薦
Motor Control (BLDC / FOC)
The 120 MHz Cortex-M4F with single-precision FPU executes field-oriented control (FOC) loops on the ATSAMD51G18A-MFT at typical 10-20 kHz switching frequencies with comfortable CPU headroom. Hardware MAC and SIMD instructions accelerate the Park/Clarke transforms that FOC requires. The 12-bit 1 Msps ADC samples two or three phase currents at low latency, and timer/counter channels generate complementary PWM outputs with hardware dead-time insertion. Dual-panel Flash supports safe firmware updates to motor-state machines without stopping the drive.
推薦
USB Data Logger
The integrated USB 2.0 Full Speed device mode on the ATSAMD51G18A-MFT turns the part into a bus-powered USB stick that streams sensor data to a host PC without external PHY hardware. 256 KB Flash stores configuration and small firmware patches; 256 KB SRAM with ECC buffers incoming samples. The Cortex-M4F core runs RTC-synchronized timestamping in single-precision floats. Industrial extended temperature (MFT suffix) supports outdoor and vehicle-environment deployments such as environmental monitoring and field telemetry.
推薦
Audio DSP Effects Processor
Cortex-M4F DSP extensions on the ATSAMD51G18A-MFT execute single-cycle MAC and SIMD operations that drive guitar-pedal, headphone-amp, and audio-effects DSP workloads in real time. The 12-bit dual DAC generates stereo output at CD-quality sample rates, while the 1 Msps ADC handles line or instrument input. The on-chip DCDC regulator provides a low-noise analog supply rail that helps preserve DAC dynamic range. The FPU keeps filter coefficients and EQ gain in IEEE-754 single precision for predictable behavior.
推薦
IoT Edge Node with TLS Offload
Running at 120 MHz with single-precision FPU, the ATSAMD51G18A-MFT executes mbedTLS or wolfSSL handshakes quickly enough for IoT edge nodes that wake on radio event, perform mutual TLS, and return to sleep. The 256 KB Flash holds a full TLS implementation plus an MQTT or CoAP client; 256 KB SRAM is sufficient for key material plus working buffers. SERCOM channels drive SPI radios, I2C sensors and UART debug output; GPIO wake sources feed the low-power sleep modes described in the manufacturer datasheet.
推薦
Precision Measurement Instrument
The 12-bit 1 Msps ADC on the ATSAMD51G18A-MFT, paired with the Cortex-M4F core, implements precision bench instruments such as handheld multimeters and process calibrators. The FPU executes RMS, true-peak, and statistical-aggregation math in single-precision floating point, while the 256 KB SRAM holds sample windows for FFT or histogram analysis. USB device mode exports measurement streams to a host PC; the extended -40C to +125C rating the MFT suffix designates supports outdoor calibration work and HVAC technician field use.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMD51G18A-MFT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SAME51G18A-MFT | ATSAMD51G18A-MU | ATSAMD51G18A-MF |
|---|---|---|---|---|
| Package | 48-pin QFN (7x7) | 48-pin QFN (7x7) | 48-pin QFN (7x7) | 48-pin QFN (7x7) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M4F, 120 MHz | Cortex-M4F, 120 MHz | Cortex-M4F, 120 MHz | Cortex-M4F, 120 MHz |
| Flash / SRAM | 256 KB / 256 KB | 256 KB / 256 KB | 256 KB / 256 KB | 256 KB / 256 KB |
| Temperature Range | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +85C |
| Packaging Form | Tape & Reel | Tape & Reel | Tray | Tray |
| Automotive Qualified | No | Yes (AEC-Q100) | No | No |
| USB Interface | USB 2.0 Full Speed | USB 2.0 Full Speed | USB 2.0 Full Speed | USB 2.0 Full Speed |
主要差異化特點
- Extended industrial temperature grade (對比ATSAMD51G18A-MU)
- Automotive-grade AEC-Q100 option in same footprint (對比SAME51G18A-MFT)
- Industrial-grade tape-and-reel packaging (對比ATSAMD51G18A-MF)
設計說明
Estimated: at 120 MHz with 3.3 V supply and full GPIO load, the ATSAMD51G18A-MFT dissipates roughly 60-90 mW. The 48-pin QFN package with the exposed pad soldered to at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) into a 1 oz inner copper pour keeps junction rise well below the 150 C absolute maximum. Without the exposed-pad copper, the part can still operate at 120 MHz in moderate ambient, but derate for +85 C and above environments.
The ATSAMD51G18A-MFT integrates a buck DCDC converter supplying the core domain from the 3.3 V rail. Use the inductor and capacitor values listed in the manufacturer reference schematic (typically 4.7 uH inductor plus low-ESR ceramic on V2A/V2B), and avoid routing high-impedance analog signals (ADC reference) under the DCDC inductor footprint to minimize coupling.
The MFT suffix is required for the industrial extended -40 C to +125 C temperature range; substituting the MF (commercial -40 C to +85 C) or MU variant will reduce the operating envelope. USB operation requires the 48 MHz clock source to be active; without a crystal or external clock on PA00/PA01, the USB controller cannot enumerate even though the part boots and runs code.
合規資訊
RoHS and lead-free per Microchip product page. AEC-Q100 qualification requires SAME51G18A-MFT part number, not the SAM D51A ATSAMD51G18A-MFT variant. Conflict-mineral reporting per Microchip corporate statement.