ATSAMG51N18A-AU - 48MHz ARM Cortex-M4 MCU 256KB Flash | Microchip
N.º da peça: ATSAMG51N18A-AU ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $6.45 | $6,45 |
| 10 | $5.78 | $57,80 |
| 100 | $5.12 | $512,00 |
| 500 | $4.55 | $2.275,00 |
| 1.000 | $4.02 | $4.020,00 |
ATSAMG51N18A-AU Visão geral
A microcontroller (MCU) is an integrated circuit that combines a CPU core, memory, and programmable peripherals on a single silicon die. The Cortex-M4 core belongs to ARM's Cortex-M family, which sits hierarchically under ARM Cortex processors -> 32-bit RISC processors -> embedded CPUs. SAM G51 devices use the Cortex-M4 with single-precision FPU and DSP extensions, enabling signal-processing workloads that simpler M0+ or M3 cores cannot efficiently execute. This hierarchy matters when selecting among thousands of MCUs: Cortex-M4 is the right choice when fixed-point or floating-point math throughput is required without moving to Cortex-M7 complexity.
Key features of the ATSAMG51N18A-AU include 256KB embedded Flash, 64KB SRAM, an FPU and DSP instruction set, a high-speed 48MHz operation, multiple serial interfaces including I2C, SPI, UART and I2S, and configurable PWM timers. The device integrates a 12-bit ADC, 10-bit DAC, and on-chip voltage regulator, allowing single-supply operation from 1.62V to 3.6V. The LQFP-100 footprint provides generous I/O for parallel buses, multiple serial channels, and motor-control PWM outputs.
The SAM G51 series was designed to minimize active-mode current and accelerate sleep-mode entry, reducing overall energy budget in duty-cycled applications. Its architecture supports zero-wait-state Flash execution at 48MHz and a low-power RTC domain that retains state during deep-sleep. Compared to legacy Cortex-M3 designs, the M4 with FPU executes filter and control algorithms in fewer cycles, which reduces both MIPS load and average power in DSP-driven workloads.
Typical applications include consumer audio devices, IoT sensor hubs, industrial control panels, motor control, and low-cost graphical user interfaces. Engineers also deploy it in smart-metering, building automation, and wireless sensor node controllers where DSP assists modulation/demodulation. The wide LQFP-100 footprint supports evaluation on breadboards and hand-solderable prototypes, making it popular in education and small-batch products.
When designing with this part, place decoupling capacitors (100nF plus 4.7uF bulk) within 5mm of each power pin, follow Microchip's SAM G51 hardware design checklist for crystal layout, and ensure the SWD pins (PA30, PA31) are accessible for in-system programming. Use Atmel Studio 7 or MPLAB X IDE with the device pack installed for firmware development.
Alternativas drop-in para ATSAMG51N18A-AU — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATSAMG51N18A-AU (mesmo formato e footprint) — diferindo em ADC, MSL Level, Package, Program Memory (Flash), RAM.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAMG51G18A-AU
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATSAMG51J18A-AU
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATSAMG51G19A-AU
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATSAMG51N19A-AU
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATSAMG51J19A-AU
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ATSAMG51N18A-AU Classificações máximas e características elétricas
| Core Processor | ARM Cortex-M4 with FPU |
| Core Size | 32-bit |
| Maximum CPU Speed | 48 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 64 KB |
| Encapsulamento | 100-pin LQFP (14x14 mm) |
| Tipo de montagem | Surface Mount |
| Supply Voltage (VDDCORE/VDDIO) | 1.62 V to 3.6 V |
| Connectivity | I2C, I2S, SPI, UART/USART |
| Peripherals | DMA, PWM, WDT, RTC, ADC, DAC |
| ADC | 12-bit |
| DAC | 10-bit |
| Faixa de temperatura de operação | -40 C to +85 C (industrial) |
| Nível MSL | 3 (168 hours) |
| Status RoHS | Compliant |
| Lead-Free | Yes |
| Series | SAM G51 |
Configuração de pinos do ATSAMG51N18A-AU
| Pino 1 | PD0 — General-purpose I/O / GPIO |
| Pino 2 | PD1 — General-purpose I/O / GPIO |
| Pino 3 | PD2 — General-purpose I/O / GPIO |
| Pino 4 | PD3 — General-purpose I/O / GPIO |
| Pino 5 | VDDOUT — Voltage regulator output (1.2V core) |
| Pino 6 | VDDIN — Voltage regulator input |
| Pino 7 | VDDIO — I/O supply voltage |
| Pino 8 | GND — Ground |
| Pino 9 | PA0 — XIN - Crystal oscillator input |
| Pino 10 | PA1 — XOUT - Crystal oscillator output |
| Pino 11 | PA2 — GPIO / PWM / ADC input |
| Pino 12 | PA3 — GPIO / PWM / ADC input |
| Pino 13 | PA4 — GPIO / PWM / ADC input |
| Pino 14 | PA5 — GPIO / PWM / ADC input |
| Pino 15 | PA6 — GPIO / PWM / ADC input |
| Pino 16 | PA7 — GPIO / PWM / ADC input |
| Pino 17 | PA8 — GPIO / PWM |
| Pino 18 | PA9 — GPIO / PWM |
| Pino 19 | PA10 — GPIO / PWM |
| Pino 20 | PA11 — GPIO / PWM / I2S |
| Pino 21 | PA12 — GPIO / PWM / I2S |
| Pino 22 | PA13 — GPIO / PWM / I2S |
| Pino 23 | PA14 — GPIO / PWM / I2S |
| Pino 24 | PA15 — GPIO / PWM |
| Pino 25 | PA16 — GPIO / PWM / SPI |
| Pino 26 | PA17 — GPIO / PWM / SPI |
| Pino 27 | PA18 — GPIO / PWM / SPI |
| Pino 28 | PA19 — GPIO / PWM / SPI |
| Pino 29 | PA20 — GPIO / PWM / UART |
| Pino 30 | PA21 — GPIO / PWM / UART |
| Pino 31 | PB0 — GPIO / PWM |
| Pino 32 | PB1 — GPIO / PWM |
| Pino 33 | PB2 — GPIO / PWM / I2C |
| Pino 34 | PB3 — GPIO / PWM / I2C |
| Pino 35 | PB4 — GPIO / PWM / UART |
| Pino 36 | PB5 — GPIO / PWM / UART |
| Pino 37 | PB6 — GPIO / PWM |
| Pino 38 | PB7 — GPIO / PWM |
| Pino 39 | PB8 — GPIO / PWM |
| Pino 40 | PB9 — GPIO / PWM |
| Pino 41 | PB10 — GPIO / PWM |
| Pino 42 | PB11 — GPIO / PWM |
| Pino 43 | PB12 — GPIO / PWM |
| Pino 44 | PB13 — GPIO / PWM |
| Pino 45 | PB14 — GPIO / PWM |
| Pino 46 | VDDIO — I/O supply voltage |
| Pino 47 | GND — Ground |
| Pino 48 | PC0 — GPIO / PWM |
| Pino 49 | PC1 — GPIO / PWM |
| Pino 50 | PC2 — GPIO / PWM / UART |
| Pino 51 | PC3 — GPIO / PWM / UART |
| Pino 52 | PC4 — GPIO / PWM / UART |
| Pino 53 | PC5 — GPIO / PWM / UART |
| Pino 54 | PC6 — GPIO / PWM / I2C |
| Pino 55 | PC7 — GPIO / PWM / I2C |
| Pino 56 | PC8 — GPIO / PWM / SPI |
| Pino 57 | PC9 — GPIO / PWM / SPI |
| Pino 58 | PC10 — GPIO / PWM / SPI |
| Pino 59 | PC11 — GPIO / PWM / SPI |
| Pino 60 | PC12 — GPIO / PWM / I2S |
| Pino 61 | PC13 — GPIO / PWM / I2S |
| Pino 62 | PC14 — GPIO / PWM / I2S |
| Pino 63 | PC15 — GPIO / PWM / I2S |
| Pino 64 | PC16 — GPIO / PWM |
| Pino 65 | PC17 — GPIO / PWM |
| Pino 66 | PC18 — GPIO / PWM |
| Pino 67 | PC19 — GPIO / PWM |
| Pino 68 | PC20 — GPIO / PWM |
| Pino 69 | PC21 — GPIO / PWM |
| Pino 70 | PC22 — GPIO / PWM |
| Pino 71 | PC23 — GPIO / PWM |
| Pino 72 | VDDIO — I/O supply voltage |
| Pino 73 | GND — Ground |
| Pino 74 | PD4 — GPIO / PWM |
| Pino 75 | PD5 — GPIO / PWM |
| Pino 76 | PD6 — GPIO / PWM |
| Pino 77 | PD7 — GPIO / PWM |
| Pino 78 | PD8 — GPIO / PWM |
| Pino 79 | PD9 — GPIO / PWM |
| Pino 80 | PD10 — GPIO / PWM |
| Pino 81 | PD11 — GPIO / PWM |
| Pino 82 | PD12 — GPIO / PWM |
| Pino 83 | PD13 — GPIO / PWM |
| Pino 84 | PD14 — GPIO / PWM |
| Pino 85 | PD15 — GPIO / PWM |
| Pino 86 | PD16 — GPIO / PWM |
| Pino 87 | PD17 — GPIO / PWM |
| Pino 88 | PD18 — GPIO / PWM |
| Pino 89 | PD19 — GPIO / PWM |
| Pino 90 | PD20 — GPIO / PWM |
| Pino 91 | PD21 — GPIO / PWM |
| Pino 92 | PD22 — GPIO / PWM |
| Pino 93 | PD23 — GPIO / PWM |
| Pino 94 | PD24 — GPIO / PWM |
| Pino 95 | PD25 — GPIO / PWM |
| Pino 96 | PD26 — GPIO / PWM |
| Pino 97 | PD27 — GPIO / PWM |
| Pino 98 | PD28 — GPIO / PWM |
| Pino 99 | PA30 — SWDIO - debug data |
| Pino 100 | PA31 — SWCLK - debug clock / NRST |
Aplicações típicas
ATSAMG51N18A-AU é adequado para 7 aplicaçãos: Consumer Audio Devices, IoT Sensor Hubs and Edge Nodes, Industrial Control Panels and HMI, Low-Cost Motor Control (BLDC / PMSM), Smart Metering and Building Automation, Educational and Prototype Development Boards, Portable Wearable Health Devices.
Consumer Audio Devices
The ATSAMG51N18A-AU is a strong fit for consumer audio products such as Bluetooth speakers, soundbars, and headphone amplifiers. Its ARM Cortex-M4 core with single-precision FPU executes audio DSP algorithms (biquad filters, dynamics processing, bass enhancement) substantially faster than Cortex-M0+ MCUs, while the I2S peripheral streams digital audio from external codecs. The 64 KB SRAM supports small audio buffers without external memory, and the wide LQFP-100 footprint gives designers generous GPIO for buttons, LED indicators, and rotary encoders typical in audio front-panel interfaces.
Recomendado
IoT Sensor Hubs and Edge Nodes
The ATSAMG51N18A-AU serves effectively as an IoT sensor hub aggregating inputs from multiple I2C/SPI sensors (temperature, humidity, accelerometers, air-quality sensors). Its DMA controller offloads sensor-streaming traffic from the CPU, freeing the Cortex-M4 to execute edge-AI inference on quantized models via CMSIS-NN. The 256 KB Flash holds RTOS kernel plus application code, while 64 KB SRAM accommodates small sensor-fusion buffers. Designers pair it with external sub-GHz or BLE modules (e.g., SAM R34 or RN4871) for wireless connectivity, since the SAM G51 has no integrated radio.
Recomendado
Industrial Control Panels and HMI
The ATSAMG51N18A-AU powers small industrial control panels and human-machine interfaces that need reliable 32-bit processing at moderate cost. Its 48 MHz Cortex-M4 with FPU runs control loops and graphics primitives for low-resolution TFT or OLED displays via SPI/parallel interfaces. The wide operating temperature range (-40 C to +85 C) supports factory-floor deployment, and the LQFP-100 footprint exposes PWM, ADC, and GPIO pins for driving relays, optocouplers, and indicator LEDs in industrial enclosures.
Recomendado
Low-Cost Motor Control (BLDC / PMSM)
The ATSAMG51N18A-AU is well matched to low-cost brushless DC and permanent-magnet synchronous motor control applications, where the Cortex-M4 DSP extensions accelerate Park/Clarke transforms and PI control loops. Its timers generate complementary PWM with dead-time insertion for three-phase inverter drives, and the 12-bit ADC samples phase currents at the PWM rate for field-oriented control. The SAM G51 family includes hardware design checklists and reference schematics specifically for motor-control boards, easing the design of small fans, pumps, and appliance drives.
Recomendado
Smart Metering and Building Automation
The ATSAMG51N18A-AU supports smart electricity, water, and gas meters as well as building-automation controllers. Its low-power sleep modes extend battery life in duty-cycled metering applications, and the RTC maintains accurate timekeeping during deep-sleep. The Cortex-M4 with FPU executes metrology algorithms (RMS calculation, harmonic analysis) efficiently, while the 12-bit ADC digitizes current/voltage sensor outputs with sufficient resolution for Class-1 metering. Multiple UART interfaces support Modbus or M-Bus communication to upstream concentrators.
Recomendado
Educational and Prototype Development Boards
The ATSAMG51N18A-AU is widely used in university courses, maker projects, and prototype boards thanks to its hand-solderable LQFP-100 package and broad toolchain support. MPLAB X IDE, Atmel Studio 7, and Microchip Harmony 3 provide a familiar development environment with CMSIS libraries, FreeRTOS ports, and example projects spanning bare-metal to RTOS. The Cortex-M4 instruction set introduces students to FPU and DSP concepts without the cost premium of Cortex-M7 silicon. Breadboard-friendly breakout boards expose all 100 pins for rapid experimentation with sensors and actuators.
Recomendado
Portable Wearable Health Devices
The ATSAMG51N18A-AU fits portable wearable health devices such as fitness bands, pulse oximeters, and wearable ECG patches. Its low active-mode current and fast wake-up from sleep modes preserve battery life, while the Cortex-M4 DSP extensions process heart-rate variability and step-count algorithms in real time. The I2C bus connects optical sensors (PPG), accelerometers, and temperature sensors commonly found in wearables. Small LQFP-100 PCB implementations (under 25x25 mm) keep the wearable form factor compact while leaving enough GPIO for haptic drivers and OLED displays.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAMG51N18A-AU — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATSAMG51G18A-AU | ATSAMG51J18A-AU | ATSAMG51G19A-AU | ATSAMG51N19A-AU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | LQFP-100 (14x14 mm) | LQFP-100 - same | LQFP-100 - same | LQFP-100 - same | LQFP-100 - same |
| Core | ARM Cortex-M4F (FPU+DSP) | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F |
| Max CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 512 KB (+100%) |
| SRAM | 64 KB | 64 KB | 64 KB | 96 KB (+50%) | 96 KB (+50%) |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Series | SAM G51 | SAM G51 | SAM G51 | SAM G51 | SAM G51 |
Principais diferenciais
- Pin-compatible upgrade path within SAM G51 family (vs ATSAMG51G19A-AU)
- Optimized for cost-sensitive 32-bit designs (vs ATSAME51N19A-AU)
- Cortex-M4 with FPU and DSP at SAM G51 price tier (vs ATSAMG51N18A-AU vs Cortex-M0+ MCUs)
Notas de projeto
Place decoupling capacitors as close as possible to each VDDIO/VDDOUT pin pair - 100 nF X7R ceramic on every VDDIO pin plus a single 4.7 uF bulk capacitor within 5 mm of the MCU. The SAM G51 internal voltage regulator powers the core from VDDIN/VDDOUT; the 1.2V output at VDDOUT requires at least 1 uF of output capacitance for regulator stability per the Microchip SAM G51 hardware design checklist. Avoid long supply traces and use a star-ground topology to minimize digital return currents coupling into analog ADC inputs.
Keep the external 12 MHz main crystal traces (PA0 XIN, PA1 XOUT) short and symmetrical, surrounded by a ground guard ring tied to the analog ground plane. Place the crystal within 5 mm of the MCU and route its signals over a continuous ground plane to avoid coupling from switching nodes. For RTC crystal on PA0/PA1 in low-power mode, increase the guard-ring isolation and avoid routing high-speed signals within 3 mm of the oscillator traces.
Do not apply 5 V to any GPIO pin - the SAM G51 is NOT 5 V tolerant and exposure above VDDIO + 0.3 V will trigger latch-up. Use external level shifters (e.g., TXS0108E) when interfacing with 5 V peripherals such as legacy RS-232 transceivers. Also note that the NRST pin is shared with PA31 SWCLK; in-circuit debugger presence is required during development but the production board must include a 10 kohm pull-up and a reset button to GND for reliable reset behavior.
Informações de conformidade
RoHS compliant per Microchip product environmental compliance documentation. Lead-free matte-tin plating. Not AEC-Q100 qualified - automotive applications should evaluate AEC-Q100-qualified SAM variants or alternative suppliers. MSL-3 floor life of 168 hours at 30 C/60% RH.
