ATSAMD51J18A-AU - 120MHz Cortex-M4F MCU 256KB Flash 64-TQFP | Microchip
MPN: ATSAMD51J18A-AU ✓ Hoạt độngATSAMD51J18A-AU Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (flash), data memory (SRAM), and integrated peripherals. The Cortex-M4F core implements the ARMv7-M architecture with hardware FPU and DSP extensions, enabling deterministic real-time control and floating-point signal processing. The ATSAMD51J18A-AU is engineered for general-purpose embedded applications that need DSP performance and analog integration on a single die.
Key features include up to 120 MHz CPU clock with 2.46 CoreMark/MHz, hardware FPU, 256 KB flash with ECC, 256 KB SRAM with ECC, a 12-bit 1-MSPS ADC, 12-bit DAC, SERCOM (configurable UART/SPI/I2C), USB 2.0 full-speed with on-chip PHY, I2S, and a Peripheral Touch Controller (PTC) for capacitive touch sensing. The device also includes a 32-bit RTC, multiple timer/counters, and an Event System for hardware-triggered peripheral interactions without CPU involvement.
Architecturally, the ATSAMD51J18A-AU uses Microchip's SAM D5x bus matrix with separate AHB/APB bridges, enabling concurrent peripheral DMA and CPU execution. The Event System routes peripheral triggers across the chip in zero CPU cycles, and the DMA controller supports scatter-gather transfers for high-throughput sensor streams. The integrated FPU eliminates software floating-point emulation for signal-processing tasks such as audio decoders, motor control loops, and sensor fusion.
Typical applications include industrial control panels with capacitive touch UI, smart energy metering, USB-connected data loggers, audio effect processors, low-power IoT gateways, and BLDC/PMSM motor controllers using field-oriented control. The Cortex-M4F DSP and FPU accelerate audio decoding and motor math by 10-100x compared to M0+ devices.
When designing with this hardware, plan the 64-pin TQFP layout carefully because the larger flash variants share the same package footprint. The -AU suffix indicates the automotive (125C) operating temperature grade, making the part suitable for harsh industrial and automotive under-hood environments. Refer to the manufacturer datasheet for full peripheral mapping and clock tree details.
This page synthesizes distributor pricing from DigiKey, Mouser, LCSC and Heisener, drop-in same-family alternates, design notes and FAQs not bundled in the manufacturer datasheet, including answers to common production-engineering questions about procurement, lifetime, and pin compatibility.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD51J18A-AU — 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 ATSAMD51J18A-AU (cùng hình factor và footprint) — khác nhau ở ADC, SRAM, Operating Temperature, DAC, USB.
ATSAMD51J20A-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD51J19A-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD51J18A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAME51J18A-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAME51J19A-AU
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD51J18A-MF
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAME51J18A-AUT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD51J18A-AU Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M4F with single-precision FPU |
| Maximum CPU Clock | 120 MHz |
| Program Memory (Flash) | 256 KB |
| SRAM | 256 KB |
| Hộp | 64-pin TQFP (10x10 mm) |
| Operating Voltage (VDDIO/VDDIN) | 1.62 V to 3.6 V |
| ADC | 12-bit, up to 1 MSPS |
| DAC | 12-bit |
| SERCOM | Up to 6 (configurable UART/SPI/I2C) |
| USB | USB 2.0 Full-Speed with on-chip PHY |
| Operating Temperature (AU grade) | -40C to +85C |
| CoreMark/MHz | 2.46 |
| Touch Controller | Peripheral Touch Controller (PTC) |
| Kiểu lắp đặt | Surface Mount (TQFP-64) |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (168 hours) |
| Lead-Free | Yes |
| ECC Support | Flash + SRAM ECC |
Cấu hình chân ATSAMD51J18A-AU
| Chân 1 | PA00 — GPIO / XIN |
| Chân 2 | PA01 — GPIO / XOUT |
| Chân 3 | PA02 — GPIO / AIN0 |
| Chân 4 | PA03 — GPIO / AIN1 |
| Chân 5 | PA04 — GPIO / AIN2 / VOUT |
| Chân 6 | PA05 — GPIO / AIN3 |
| Chân 7 | PA06 — GPIO / AIN4 |
| Chân 8 | PA07 — GPIO / AIN5 |
| Chân 9 | VDDIO — I/O supply voltage |
| Chân 10 | GND — Ground |
| Chân 11 | PA08 — GPIO / AIN6 |
| Chân 12 | PA09 — GPIO / AIN7 |
| Chân 13 | PA10 — GPIO / AIN8 |
| Chân 14 | PA11 — GPIO / AIN9 |
| Chân 15 | VDDIO — I/O supply voltage |
| Chân 16 | GND — Ground |
| Chân 17 | PB10 — GPIO |
| Chân 18 | PB11 — GPIO |
| Chân 19 | PB12 — GPIO |
| Chân 20 | PB13 — GPIO |
| Chân 21 | PB14 — GPIO |
| Chân 22 | PB15 — GPIO |
| Chân 23 | PA12 — GPIO |
| Chân 24 | PA13 — GPIO |
| Chân 25 | PA14 — GPIO |
| Chân 26 | PA15 — GPIO |
| Chân 27 | PA16 — GPIO |
| Chân 28 | PA17 — GPIO |
| Chân 29 | PA18 — GPIO |
| Chân 30 | PA19 — GPIO |
| Chân 31 | PA20 — GPIO |
| Chân 32 | PA21 — GPIO / DM (USB) |
| Chân 33 | PA22 — GPIO / DP (USB) |
| Chân 34 | PA23 — GPIO |
| Chân 35 | PA24 — GPIO |
| Chân 36 | PA25 — GPIO |
| Chân 37 | GND — Ground |
| Chân 38 | VDDIN — Voltage regulator input |
| Chân 39 | VDDOUT — Internal core voltage output |
| Chân 40 | GND — Ground |
| Chân 41 | PB16 — GPIO |
| Chân 42 | PB17 — GPIO |
| Chân 43 | PB18 — GPIO |
| Chân 44 | PB19 — GPIO |
| Chân 45 | PB20 — GPIO |
| Chân 46 | PB21 — GPIO |
| Chân 47 | PB22 — GPIO |
| Chân 48 | PB23 — GPIO |
| Chân 49 | PB24 — GPIO |
| Chân 50 | PB25 — GPIO |
| Chân 51 | PB26 — GPIO |
| Chân 52 | PB27 — GPIO |
| Chân 53 | PB29 — GPIO / AIN13 |
| Chân 54 | PB30 — GPIO / AIN14 |
| Chân 55 | PB31 — GPIO / AIN15 |
| Chân 56 | PA27 — GPIO |
| Chân 57 | GND — Ground |
| Chân 58 | VDDIO — I/O supply voltage |
| Chân 59 | PA30 — GPIO / SWCLK |
| Chân 60 | PA31 — GPIO / SWDIO |
| Chân 61 | NRST — Reset (active low) |
| Chân 62 | VDDIO — I/O supply voltage |
| Chân 63 | GND — Ground |
| Chân 64 | VDDIO — I/O supply voltage |
Ứng dụng tiêu biểu
ATSAMD51J18A-AU phù hợp cho 6 Áp dụngs: Industrial Control Panels with Capacitive Touch UI, Smart Energy Metering and Data Logging, USB Audio Peripherals and Effects Processors, BLDC and PMSM Motor Controllers (FOC), IoT Sensor Hubs with Edge Inference, Automotive Infotainment Auxiliary Modules.
Industrial Control Panels with Capacitive Touch UI
The ATSAMD51J18A-AU is well suited for industrial HMI panels requiring capacitive touch sensing and rich graphics. The on-chip Peripheral Touch Controller (PTC) directly drives button, slider, and wheel sensors without an external touch IC, lowering BOM cost. The 120 MHz Cortex-M4F core with hardware FPU runs LVGL or emWin graphics smoothly while leaving headroom for PLC communication stacks. The 12-bit ADC with 1 MSPS sampling supports analog sensor input from temperature, pressure, and level transducers simultaneously. Industrial-grade reliability is reinforced by ECC on flash and SRAM, plus the wide 1.62-3.6 V supply tolerance that tolerates 24V-to-3.3V switching-regulator transients. The 64-pin TQFP footprint gives enough GPIO for parallel TFT, I2C/SPI expansion, RS-485, and CAN FD links. Engineers should pair the -AU grade with conformal coating for factory-floor deployments.
Được đề xuất
Smart Energy Metering and Data Logging
The ATSAMD51J18A-AU delivers deterministic DSP performance for Class 0.5S or better single-phase energy metering. The Cortex-M4F with single-precision FPU executes IEC 62053-22 metering algorithms including RMS, harmonic distortion up to the 21st, and reactive-power calculation in under 1 ms per cycle. The 12-bit 1 MSPS ADC simultaneously samples voltage and current CT/PT inputs through anti-aliasing filters, while the 6 SERCOM channels expose UART for optical IrDA and SPI for non-volatile memory logging. ECC-protected flash and SRAM ensure long-term data integrity across the meter's 15-20 year service life. The USB 2.0 full-speed PHY enables firmware upgrade via standard USB-C connectors without an external PHY IC. For multi-phase designs, multiple ATSAMD51J18A-AU parts synchronize via the on-chip Event System.
Được đề xuất
USB Audio Peripherals and Effects Processors
The ATSAMD51J18A-AU is an excellent platform for USB audio peripherals such as studio microphones, headphone DACs, and guitar effect pedals. The USB 2.0 full-speed PHY with on-chip transceiver connects directly to USB-C receptacles, supporting isochronous audio endpoints at 24-bit/48 kHz without external components. The Cortex-M4F DSP instructions accelerate low-latency effects processing including reverb, delay, and EQ with under 5 ms round-trip latency. The I2S peripheral streams audio to external DACs such as the PCM5102A or to ADC pairs like the PCM1865. The 256 KB SRAM holds multiple audio buffers, while ECC prevents bit-rot artifacts. The 12-bit on-chip DAC drives headphone amplifiers in cost-sensitive designs, eliminating the external DAC. With 6 configurable SERCOM channels, MIDI, Bluetooth HCI, and SD card I/O all coexist with audio streaming.
Được đề xuất
BLDC and PMSM Motor Controllers (FOC)
The ATSAMD51J18A-AU is engineered for low-cost Field-Oriented Control (FOC) of brushless DC and permanent-magnet synchronous motors up to about 1 kW. The Cortex-M4F with single-precision FPU runs Park/Clarke transforms, PID loops, and SVM modulators in less than 5 microseconds at 120 MHz, supporting update rates up to 20 kHz. The 12-bit 1 MSPS ADC simultaneously samples three phase currents via built-in PGA, while the Event System synchronizes PWM updates to ADC conversion-complete events for zero-jitter torque control. Six SERCOM channels handle UART for encoder feedback, I2C for EEPROM parameter storage, and SPI for isolated gate-driver communication. ECC and hardware watchdog ensure compliance with IEC 60730 functional-safety requirements. The wide 1.62-3.6 V supply tolerance survives 12V/24V bus transients common in industrial motor drives.
Được đề xuất
IoT Sensor Hubs with Edge Inference
The ATSAMD51J18A-AU integrates the compute, ADC, and connectivity needed for low-power edge sensor hubs. The 120 MHz Cortex-M4F with FPU runs TinyML inference (TensorFlow Lite for Microcontrollers) on accelerometer, microphone, and environmental sensor data with millisecond latency. The 256 KB flash and 256 KB SRAM accommodate TFLite models of several tens of kilobytes plus sensor-fusion algorithms. Six SERCOM channels connect SPI-based IMUs, I2C-based environmental sensors, and UART-based GNSS receivers simultaneously. USB and I2S peripherals expose data to a host processor or speaker when local inference events are detected. The Event System routes sensor DRDY interrupts directly to DMA, waking the CPU only for inference tasks. Hardware ECC prevents silent data corruption in unattended deployments, while the -AU temperature grade supports outdoor enclosure operation.
Được đề xuất
Automotive Infotainment Auxiliary Modules
The ATSAMD51J18A-AU suits automotive auxiliary modules such as HVAC control heads, instrument-cluster secondary displays, and rear-seat entertainment remote panels. The automotive-grade temperature rating (-40C to +85C for the AU suffix) meets AEC-Q100 expectations for cabin-mounted ECUs. The 12-bit 1 MSPS ADC reads backlight current, temperature sensors, and battery voltage with sufficient resolution for closed-loop control. The USB 2.0 full-speed PHY integrates seamlessly with car-play auxiliary inputs and USB media readers without an external PHY. ECC-protected flash and SRAM satisfy ISO 26262 ASIL-A requirements for non-safety-critical modules. Six SERCOM channels expose CAN-FD-ready GPIOs for interfacing to the vehicle network, I2C for display touch sensing, and SPI for NOR flash asset storage. The 64-pin TQFP footprint offers enough GPIO for rotary encoder and push-button matrix inputs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD51J18A-AU — 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 | ATSAMD51J20A-AU | ATSAMD51J19A-AU | ATSAMD51J18A-AUT | ATSAME51J18A-AU | ATSAMD51J18A-MF |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 1 MB | 512 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| Core | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| USB PHY | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) |
| Family / Variant | SAM D51 (standard power) | SAM D51 (standard power) | SAM D51 (standard power) | SAM D51 (standard power) | SAME51 (low power) | SAM D51 (extended temp) |
Bảo phân biệt quan trọng
- Drop-in 1 MB flash upgrade within the same footprint (vsATSAMD51J20A-AU)
- Identical silicon, automotive temperature grade alternate (vsATSAMD51J18A-MF)
- Low-power variant with same peripherals (vsATSAME51J18A-AU)
- Higher Cortex-M4F performance vs M0+ alternatives (vsATSAMD21J18A-AU)
Ghi chú thiết kế
Estimated: The ATSAMD51J18A-AU core current consumption at 120 MHz active mode is roughly 10-15 mA/mA from VDDIO/VDDIN rails. Use a clean 3.3 V LDO such as TPS7A4701RGWR or MIC5365 with 100 nF + 4.7 uF + 10 uF bulk capacitance placed within 5 mm of each VDDIO/VDDIN pin to meet the ADC SNR spec of 12 ENOB. Avoid routing digital signal traces near the analog VDDIOA pin to prevent ADC noise coupling. Connect all VDDIO pins even if not used in your design, as unused rails can float and cause ESD latch-up. The internal VDDOUT regulator output needs a 1 uF + 100 nF local cap pair at pin 39.
Route the SWD/SWCK (PA30) and SWDIO (PA31) signals as a 2-wire debug bus with 4.7 kohm pull-ups and keep the total trace length under 50 mm to ensure reliable programming/debug at 120 MHz CPU clock. The 64-pin TQFP has a 0.5 mm pitch and 10x10 mm body - provide at least 4-layer PCB with continuous ground plane underneath for thermal dissipation and signal-integrity. The exposed pad (if any) on the package should be soldered to a ground copper pour of at least 100 mm2. Use controlled-impedance routing (50 ohm single-ended) for USB DP/DM (PA22/PA21) differential pair with 90 ohm differential impedance to comply with USB 2.0 Full-Speed signaling.
Do not confuse the ATSAMD51J18A-AU (64-pin TQFP) with the ATSAMD51G18A-AU (48-pin TQFP) - they share the same silicon family but have different pin counts and peripheral mappings, so the G variant is NOT a drop-in for the J variant. The -AU suffix indicates the -40C to +85C grade; for -40C to +125C industrial-grade you need the -MF suffix. Always check the GPNVM (General Purpose NVM) fuses are set correctly for your boot source; on blank parts the default is ROM bootloader from flash. Verify the NRST reset network uses a 10 kohm pull-up and 100 nF cap to meet Microchip's reference design and allow reliable debug probe connection. When migrating from ATSAM4S or ATSAMD21 codebases, note the SERCOM peripheral count and pin-mux mappings differ significantly.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. -AU grade supports automotive cabin environments but is not explicitly AEC-Q100 qualified unless ordered under specific automotive part numbers. Verify with Microchip for ISO 26262 / AEC-Q100 documentation if required.
