ATSAMD51N20A-AU - 120MHz Cortex-M4F MCU 1MB Flash 100-TQFP | Microchip
MPN: ATSAMD51N20A-AU ✓ نشطATSAMD51N20A-AU نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals on one silicon die, forming the embedded intelligence in countless products. Within the broader taxonomy, the ATSAMD51N20A-AU is an ARM Cortex-M4F MCU, belongs to the Cortex-M4 class of 32-bit microcontrollers, falls under the microcontroller (MCU) category, and finally under the integrated circuit (IC) family of semiconductors. Microchip's SAM D5x/E5x family extends the lower-pin-count SAM D2x/D1x line with higher performance, more memory, and richer peripherals while maintaining peripheral IP compatibility via SERCOM and Event System.
Key features include: ARM Cortex-M4F core with FPU and DSP extensions at up to 120 MHz; 1 MB dual-panel Flash with ECC and 256 KB SRAM with ECC; full-speed and high-speed USB 2.0 with on-chip PHY; six SERCOM serial channels (UART/SPI/I2C/LIN); I2S audio interface, SD/MMC host, and Quad-SPI memory interface; 12-bit 1 MSPS ADC with up to 32 channels, two 12-bit DACs, and three analog comparators; 16-bit and 24-bit timers with PWM, capture, and quadrature decode; 1.71V to 3.6V single supply; and AEC-Q100 qualification on the -AUT suffix variants.
The ATSAMD51 uses Microchip's Event System and SERCOM peripherals to route signals directly between peripherals and configurable serial engines, offloading I/O handling from the CPU. The Cortex-M4F with FPU delivers 1.25 DMIPS/MHz and supports single-precision IEEE 754 floating-point in hardware. The dual-panel Flash and ECC-protected SRAM enable safety-critical firmware reliability, while TrustZone-M is supported on the E5x variants but not on the D51 family. Cache and Prefetch buffers accelerate instruction throughput from Flash.
Typical applications include: industrial HMI and control panels, USB-equipped embedded devices, IoT edge nodes with crypto, audio playback and processing systems, motor control and FOC motor drives, and home automation hubs. In each, the combination of USB PHY, FPU, large Flash, and ECC memory uniquely fits scenarios requiring deterministic response plus connected peripherals.
Design consideration - the ATSAMD51N20A-AU's -AU suffix indicates the 100-pin TQFP package with -40C to +85C industrial temperature range; for AEC-Q100 automotive grade, select the -AUT variant. Use a 10uF plus 100nF decoupling pair close to each VDD pin and keep the 32.768 kHz crystal traces short.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
بدائل مباشرة لـ ATSAMD51N20A-AU — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATSAMD51N20A-AU (نفس عامل الشكل والبصمة) — يختلف في Operating Temperature, USB, Package, ADC, DAC.
ATSAMD51N20A-AUT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ATSAMD51N20A-AU-EFP
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAMD51N20A-AUT-EFP
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAMD51N20A-AFT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAMD51N19A-AUT-EFP
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAME51N20A-AU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATSAMD51N20A-AU الحدود القصوى والخصائص الكهربائية
| Core | ARM Cortex-M4F with FPU |
| أقصى تردد للساعة | 120 MHz |
| Flash Memory | 1 MB (1M x 8) dual-panel with ECC |
| SRAM | 256 KB with ECC |
| Operating Voltage | 1.71 V to 3.6 V |
| ADC | 12-bit, up to 1 MSPS, up to 32 channels |
| DAC | Dual 12-bit DAC |
| USB | USB 2.0 Full-/High-Speed with on-chip PHY |
| Serial Interfaces | 6x SERCOM (UART/SPI/I2C/LIN) |
| Audio Interface | I2S |
| Memory Card Interface | SD/MMC host controller |
| Timers | 16-bit and 24-bit, with PWM/capture/quadrature |
| Analog Comparators | 3 |
| درجة حرارة التشغيل | -40C to +85C (industrial) |
| العلبة | 100-pin TQFP (14x14 mm) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 (168 hours) |
| حالة RoHS | Compliant |
تكوين أطراف ATSAMD51N20A-AU
| دبوس 1 | PB04 — GPIO PB04 / I2S MCK1 |
| دبوس 2 | PB05 — GPIO PB05 / I2S SCK1 |
| دبوس 3 | PB06 — GPIO PB06 / I2S FS1 |
| دبوس 4 | PB07 — GPIO PB07 / I2S DATA1 output |
| دبوس 5 | PB08 — GPIO PB08 / I2S DATA1 input |
| دبوس 6 | PB09 — GPIO PB09 / I2S MCK0 |
| دبوس 7 | PA00 — GPIO PA00 / XIN32 |
| دبوس 8 | PA01 — GPIO PA01 / XOUT32 |
| دبوس 9 | PA02 — GPIO PA02 / AIN0 / DAC0 |
| دبوس 10 | PA03 — GPIO PA03 / AIN1 / DAC1 / VREFA |
| دبوس 11 | GND — Ground |
| دبوس 12 | VDDANA — Analog supply voltage |
| دبوس 13 | PA04 — GPIO PA04 / AIN2 |
| دبوس 14 | PA05 — GPIO PA05 / AIN3 |
| دبوس 15 | PA06 — GPIO PA06 / AIN4 |
| دبوس 16 | PA07 — GPIO PA07 / AIN5 |
| دبوس 17 | PA08 — GPIO PA08 / AIN6 |
| دبوس 18 | PA09 — GPIO PA09 / AIN7 |
| دبوس 19 | PA10 — GPIO PA10 / AIN8 |
| دبوس 20 | PA11 — GPIO PA11 / AIN9 |
| دبوس 21 | GND — Ground |
| دبوس 22 | VDDIO — I/O supply voltage |
| دبوس 23 | PB10 — GPIO PB10 |
| دبوس 24 | PB11 — GPIO PB11 |
| دبوس 25 | PB12 — GPIO PB12 |
| دبوس 26 | PB13 — GPIO PB13 |
| دبوس 27 | PB14 — GPIO PB14 |
| دبوس 28 | PB15 — GPIO PB15 |
| دبوس 29 | PA12 — GPIO PA12 |
| دبوس 30 | PA13 — GPIO PA13 |
| دبوس 31 | PA14 — GPIO PA14 |
| دبوس 32 | PA15 — GPIO PA15 |
| دبوس 33 | GND — Ground |
| دبوس 34 | VDDIO — I/O supply voltage |
| دبوس 35 | PA16 — GPIO PA16 |
| دبوس 36 | PA17 — GPIO PA17 |
| دبوس 37 | PA18 — GPIO PA18 |
| دبوس 38 | PA19 — GPIO PA19 |
| دبوس 39 | PB16 — GPIO PB16 |
| دبوس 40 | PB17 — GPIO PB17 |
| دبوس 41 | PB18 — GPIO PB18 |
| دبوس 42 | PB19 — GPIO PB19 |
| دبوس 43 | PB20 — GPIO PB20 |
| دبوس 44 | PB21 — GPIO PB21 |
| دبوس 45 | PA20 — GPIO PA20 |
| دبوس 46 | PA21 — GPIO PA21 |
| دبوس 47 | PA22 — GPIO PA22 |
| دبوس 48 | PA23 — GPIO PA23 |
| دبوس 49 | GND — Ground |
| دبوس 50 | VDDIO — I/O supply voltage |
| دبوس 51 | PA24 — GPIO PA24 / USB_DM |
| دبوس 52 | PA25 — GPIO PA25 / USB_DP |
| دبوس 53 | PB22 — GPIO PB22 |
| دبوس 54 | PB23 — GPIO PB23 |
| دبوس 55 | PB24 — GPIO PB24 |
| دبوس 56 | PB25 — GPIO PB25 |
| دبوس 57 | PB26 — GPIO PB26 / AIN14 |
| دبوس 58 | PB27 — GPIO PB27 / AIN15 |
| دبوس 59 | PB28 — GPIO PB28 / AIN16 |
| دبوس 60 | PB29 — GPIO PB29 / AIN17 |
| دبوس 61 | PA30 — GPIO PA30 / SWCLK |
| دبوس 62 | PA31 — GPIO PA31 / SWDIO |
| دبوس 63 | PB30 — GPIO PB30 / TDI |
| دبوس 64 | PB31 — GPIO PB31 / TDO |
| دبوس 65 | GND — Ground |
| دبوس 66 | VDDIO — I/O supply voltage |
| دبوس 67 | PC00 — GPIO PC00 |
| دبوس 68 | PC01 — GPIO PC01 |
| دبوس 69 | PC02 — GPIO PC02 |
| دبوس 70 | PC03 — GPIO PC03 |
| دبوس 71 | PC04 — GPIO PC04 |
| دبوس 72 | PC05 — GPIO PC05 |
| دبوس 73 | PC06 — GPIO PC06 |
| دبوس 74 | PC07 — GPIO PC07 |
| دبوس 75 | PC08 — GPIO PC08 / SD HC DETECT |
| دبوس 76 | PC09 — GPIO PC09 / SD HC WRITE PROTECT |
| دبوس 77 | PC10 — GPIO PC10 / SD HC CMD |
| دبوس 78 | PC11 — GPIO PC11 / SD HC CK |
| دبوس 79 | PA10 — GPIO PA10 alt / SD HC DATA0 (duplicated) |
| دبوس 80 | PD00 — GPIO PD00 / SD HC DATA1 |
| دبوس 81 | PD01 — GPIO PD01 / SD HC DATA2 |
| دبوس 82 | PD02 — GPIO PD02 / SD HC DATA3 |
| دبوس 83 | PD03 — GPIO PD03 |
| دبوس 84 | PD04 — GPIO PD04 |
| دبوس 85 | PD05 — GPIO PD05 |
| دبوس 86 | PD06 — GPIO PD06 |
| دبوس 87 | PD07 — GPIO PD07 |
| دبوس 88 | PD08 — GPIO PD08 |
| دبوس 89 | PD09 — GPIO PD09 |
| دبوس 90 | PD10 — GPIO PD10 |
| دبوس 91 | PD11 — GPIO PD11 |
| دبوس 92 | PD12 — GPIO PD12 |
| دبوس 93 | GND — Ground |
| دبوس 94 | VDDIO — I/O supply voltage |
| دبوس 95 | XIN — Crystal oscillator input (12 MHz) |
| دبوس 96 | XOUT — Crystal oscillator output (12 MHz) |
| دبوس 97 | GND — Ground |
| دبوس 98 | RESET — Reset (active low) |
| دبوس 99 | VDDIO — I/O supply voltage |
| دبوس 100 | PB00 — GPIO PB00 |
التطبيقات النموذجية
ATSAMD51N20A-AU مناسب لـ 6 التطبيقs: Industrial Human-Machine Interface (HMI) Controller, USB-Equipped Embedded Device, Audio Playback and Processing System, IoT Edge Node with Crypto Acceleration, Motor Control and FOC Motor Drive, Home Automation Hub and Gateway.
Industrial Human-Machine Interface (HMI) Controller
The ATSAMD51N20A-AU is well-suited as the central MCU behind industrial HMI panels combining touch input, a TFT LCD display, and USB connectivity. Its Cortex-M4F at 120 MHz executes LVGL/MODM graphics stacks in real time without frame drops, while the 1 MB Flash holds both the UI assets and the application firmware with ECC safety. The dual 12-bit DACs drive contrast/backlight PWM via op-amps, and six SERCOM channels connect SPI displays, I2C touch controllers, and UART/RS-485 fieldbuses simultaneously. Compared with SAM D2x family MCUs, the ATSAMD51N20A-AU doubles performance and adds USB High-Speed with on-chip PHY, eliminating the external ULPI transceiver and saving BOM cost in every HMI panel.
موصى به
USB-Equipped Embedded Device
The ATSAMD51N20A-AU integrates a USB 2.0 High-Speed PHY on-chip with device, host, and OTG modes, removing the need for an external ULPI transceiver and reducing BOM by $1-$2 per unit. At 120 MHz the Cortex-M4F handles USB CDC/MSC/HID class stacks concurrently with application firmware, while 256 KB ECC SRAM buffers high-bandwidth USB isochronous transfers. Connect the DP/DM pins directly to the USB-C connector through 39 ohm series resistors and ESD protection per the SAM D51 datasheet DS40001881G. Compared with PIC32MK MCUs, the ATSAMD51N20A-AU offers more SERCOM flexibility and better floating-point performance for DSP-style data processing over USB.
موصى به
Audio Playback and Processing System
The ATSAMD51N20A-AU combines a Cortex-M4F DSP-extended core, a hardware I2S interface, and dual 12-bit DACs - the right mix for audio playback, tone prompting, and basic DSP processing. The M4F's single-cycle MAC instructions accelerate MP3/AAC/Opus decoding in firmware, while I2S drives external 24-bit codecs like the TLV320AIC3106 over 4 wires. ECC SRAM buffers uncompressed WAV streams without dropouts, and the 1 MB Flash stores firmware plus compressed audio assets. Compared with MMA796 boards using SAM S70, the ATSAMD51N20A-AU fits smaller form factors while keeping sufficient audio performance for toys, doorbells, and industrial annunciators.
موصى به
IoT Edge Node with Crypto Acceleration
The ATSAMD51N20A-AU fits as the central MCU in IoT edge nodes requiring TLS/DTLS handshake, secure firmware storage, and OTA update capability. Its 120 MHz Cortex-M4F runs mbedTLS/X.509 handshakes in milliseconds, while ECC-protected Flash and SRAM safeguard firmware integrity in the field. Six SERCOM channels connect Wi-Fi/BLE modules (e.g., ATWINC1500 or RN4871) plus sensor I2C/SPI buses. The -AU 100-pin TQFP package exposes all peripheral pins for breadboard-friendly prototypes. Compared with SAM D2x, the N20A's larger 1 MB Flash supports dual-bank OTA with rollback safety.
موصى به
Motor Control and FOC Motor Drive
The ATSAMD51N20A-AU's Cortex-M4F core, 120 MHz speed, hardware FPU, and PWM-capable 24-bit timers make it well-suited for sensorless field-oriented control (FOC) of BLDC and PMSM motors. The 1 MSPS 12-bit ADC samples three-phase currents synchronously to PWM, while dual 12-bit DACs output reference waveforms for self-test. SERCOM channels connect to the gate driver SPI, isolated UART, and CAN-FD controller. Compared with dsPIC33 dedicated motor-control DSPs, the ATSAMD51N20A-AU sacrifices a few MIPS but gains the broader ARM ecosystem and easier migration to ATSAME51 with TrustZone for secure motor firmware.
موصى به
Home Automation Hub and Gateway
The ATSAMD51N20A-AU functions as the main controller inside a home automation hub that aggregates Zigbee, Wi-Fi, Z-Wave, and wired sensors, presents a local web UI, and bridges to cloud APIs. Its USB High-Speed PHY provides a 480 Mbps upstream link to a Raspberry Pi-class host or directly to a Wi-Fi module, while 256 KB ECC SRAM buffers simultaneous TLS sessions. The I2S interface drives a local speaker for voice feedback, and the SD/MMC host logs sensor history. Compared with ESP32-based hubs, the ATSAMD51N20A-AU offers more deterministic response and industrial-grade reliability for always-on service.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATSAMD51N20A-AU — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ATSAMD51N20A-AUT | ATSAMD51N20A-AU-EFP | ATSAMD51N20A-AUT-EFP | ATSAMD51N20A-AFT | ATSAMD51N19A-AUT-EFP | ATSAME51N20A-AU |
|---|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14) | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same | 100-TQFP (14x14) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz + TrustZone-M |
| Flash | 1 MB | 1 MB | 1 MB | 1 MB | 1 MB | 512 KB (-50%) | 1 MB |
| SRAM | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| Temperature Range | -40C to +85C (industrial) | -40C to +125C (automotive) | -40C to +85C (industrial) | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +85C (industrial) |
| AEC-Q100 Qualification | No | Yes | No | Yes | Yes | Yes | No |
| SERCOM Channels | 6 | 6 | 6 | 6 | 6 | 6 | 7 (+1) |
| TrustZone-M Security | No | No | No | No | No | No | Yes |
أبرز الفروقات
- On-chip USB High-Speed PHY eliminates external ULPI transceiver (مقابلATSAMD21J18A-AU)
- Hardware FPU at 120 MHz Cortex-M4F for DSP and floating point (مقابلATSAMD51J19A-AU)
- 1 MB dual-panel Flash with ECC for safe firmware updates (مقابلATSAMD51N19A-AUT-EFP)
ملاحظات التصميم
Decouple every VDDIO and VDDANA pin pair with 100 nF ceramic capacitors placed within 2 mm of the pin, and add a single 10 uF bulk capacitor per supply rail. The SAM D51 datasheet DS40001881G specifies that the digital and analog supplies may be tied together for simplicity, but separating them with a ferrite bead and dedicated regulator for VDDANA reduces ADC noise floor by approximately 6-8 dB. Use a low-noise LDO such as the AP2112-3.3 for VDDANA in ADC-intensive designs. Bring VDDIO up before VDDANA to avoid latch-up; the on-chip power-on-reset circuit monitors both rails.
The 100-pin TQFP package of the ATSAMD51N20A-AU has typical thermal resistance theta_JA of approximately 50 C/W with standard JEDEC 2s2p test PCB. At 120 MHz full activity across all peripherals, internal power dissipation rarely exceeds 200-300 mW, yielding junction temperature rise of 10-15 C above ambient - well within the -40C to +85C industrial range. For high-ambient enclosures above 60 C, design a copper pour of at least 0.5 square inches on the top layer under the TQFP exposed pad-adjacent ground area to keep junction below 100 C during continuous USB High-Speed operation.
Route the USB DP/DM differential pair with 90 ohm differential impedance and equal length matching within 150 mil of each other. Place the ESD protection array USBLC6 within 5 mm of the USB-C connector, not at the MCU. For the 12 MHz main crystal, keep traces short (under 6 mm) and surround them with a ground pour; route the 32.768 kHz crystal traces similarly to minimize jitter. SERCOM signals can be routed as needed, but use ground-via stitching every 100 mil along their length to control EMI. Verify clearance between the TQFP pad and inner-layer ground fill to prevent manufacturing shorts.
Avoid the common mistake of leaving the I2S peripheral misconfigured - the SAM D51 datasheet DS40001881G warns that I2S MCK must be enabled explicitly in the I2S CTRLA register before clocks appear on the pin. When migrating from SAM D2x to D51, note that SERCOM pad multiplexing has been remapped for several pins; do not assume the D21/D20 firmware pin assignments work directly on D51. Also, ECC-protected Flash and SRAM must be initialized by the startup code or the first read may return corrected errors that flag an interrupt - call NVMCTRL.CTRLA and configure RAMECC before main().
معلومات الامتثال
RoHS compliant per Microchip product page DS40001881G. ATSAMD51N20A-AU is the industrial grade variant (not AEC-Q100) - select the -AUT suffix for AEC-Q100 automotive qualification.
