ATSAMD51N20A-AU - 120MHz Cortex-M4F MCU 1MB Flash 100-TQFP | Microchip
Référence : ATSAMD51N20A-AU ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $13.54 | $13,54 |
| 10 | $12.18 | $121,80 |
| 100 | $10.85 | $1 085,00 |
| 500 | $9.62 | $4 810,00 |
| 1 000 | $8.49 | $8 490,00 |
ATSAMD51N20A-AU Présentation
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.
Alternatives de remplacement direct pour ATSAMD51N20A-AU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAMD51N20A-AU (même facteur de forme et même empreinte) — différant par Operating Temperature, USB, Package, ADC, DAC.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAMD51N20A-AUT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMD51N20A-AU-EFP
✅ Remplacement direct✓ En stock
$9.42 / unité
Voir la fiche technique →ATSAMD51N20A-AUT-EFP
✅ Remplacement direct✓ En stock
$6.43 / unité
Voir la fiche technique →ATSAMD51N20A-AFT
✅ Remplacement direct✓ En stock
$8.8 / unité
Voir la fiche technique →ATSAMD51N19A-AUT-EFP
✅ Remplacement direct✓ En stock
$3.65 / unité
Voir la fiche technique →ATSAME51N20A-AU
✅ Remplacement direct✓ En stock
$8.97 / unité
Voir la fiche technique →ATSAMD51N20A-AU Valeurs maximales et caractéristiques électriques
| Core | ARM Cortex-M4F with FPU |
| Fréquence d'horloge maximale | 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 |
| Température de fonctionnement | -40C to +85C (industrial) |
| Boîtier | 100-pin TQFP (14x14 mm) |
| Type de montage | Surface Mount |
| Niveau MSL | 3 (168 hours) |
| Statut RoHS | Compliant |
Configuration des broches de ATSAMD51N20A-AU
| Broche 1 | PB04 — GPIO PB04 / I2S MCK1 |
| Broche 2 | PB05 — GPIO PB05 / I2S SCK1 |
| Broche 3 | PB06 — GPIO PB06 / I2S FS1 |
| Broche 4 | PB07 — GPIO PB07 / I2S DATA1 output |
| Broche 5 | PB08 — GPIO PB08 / I2S DATA1 input |
| Broche 6 | PB09 — GPIO PB09 / I2S MCK0 |
| Broche 7 | PA00 — GPIO PA00 / XIN32 |
| Broche 8 | PA01 — GPIO PA01 / XOUT32 |
| Broche 9 | PA02 — GPIO PA02 / AIN0 / DAC0 |
| Broche 10 | PA03 — GPIO PA03 / AIN1 / DAC1 / VREFA |
| Broche 11 | GND — Ground |
| Broche 12 | VDDANA — Analog supply voltage |
| Broche 13 | PA04 — GPIO PA04 / AIN2 |
| Broche 14 | PA05 — GPIO PA05 / AIN3 |
| Broche 15 | PA06 — GPIO PA06 / AIN4 |
| Broche 16 | PA07 — GPIO PA07 / AIN5 |
| Broche 17 | PA08 — GPIO PA08 / AIN6 |
| Broche 18 | PA09 — GPIO PA09 / AIN7 |
| Broche 19 | PA10 — GPIO PA10 / AIN8 |
| Broche 20 | PA11 — GPIO PA11 / AIN9 |
| Broche 21 | GND — Ground |
| Broche 22 | VDDIO — I/O supply voltage |
| Broche 23 | PB10 — GPIO PB10 |
| Broche 24 | PB11 — GPIO PB11 |
| Broche 25 | PB12 — GPIO PB12 |
| Broche 26 | PB13 — GPIO PB13 |
| Broche 27 | PB14 — GPIO PB14 |
| Broche 28 | PB15 — GPIO PB15 |
| Broche 29 | PA12 — GPIO PA12 |
| Broche 30 | PA13 — GPIO PA13 |
| Broche 31 | PA14 — GPIO PA14 |
| Broche 32 | PA15 — GPIO PA15 |
| Broche 33 | GND — Ground |
| Broche 34 | VDDIO — I/O supply voltage |
| Broche 35 | PA16 — GPIO PA16 |
| Broche 36 | PA17 — GPIO PA17 |
| Broche 37 | PA18 — GPIO PA18 |
| Broche 38 | PA19 — GPIO PA19 |
| Broche 39 | PB16 — GPIO PB16 |
| Broche 40 | PB17 — GPIO PB17 |
| Broche 41 | PB18 — GPIO PB18 |
| Broche 42 | PB19 — GPIO PB19 |
| Broche 43 | PB20 — GPIO PB20 |
| Broche 44 | PB21 — GPIO PB21 |
| Broche 45 | PA20 — GPIO PA20 |
| Broche 46 | PA21 — GPIO PA21 |
| Broche 47 | PA22 — GPIO PA22 |
| Broche 48 | PA23 — GPIO PA23 |
| Broche 49 | GND — Ground |
| Broche 50 | VDDIO — I/O supply voltage |
| Broche 51 | PA24 — GPIO PA24 / USB_DM |
| Broche 52 | PA25 — GPIO PA25 / USB_DP |
| Broche 53 | PB22 — GPIO PB22 |
| Broche 54 | PB23 — GPIO PB23 |
| Broche 55 | PB24 — GPIO PB24 |
| Broche 56 | PB25 — GPIO PB25 |
| Broche 57 | PB26 — GPIO PB26 / AIN14 |
| Broche 58 | PB27 — GPIO PB27 / AIN15 |
| Broche 59 | PB28 — GPIO PB28 / AIN16 |
| Broche 60 | PB29 — GPIO PB29 / AIN17 |
| Broche 61 | PA30 — GPIO PA30 / SWCLK |
| Broche 62 | PA31 — GPIO PA31 / SWDIO |
| Broche 63 | PB30 — GPIO PB30 / TDI |
| Broche 64 | PB31 — GPIO PB31 / TDO |
| Broche 65 | GND — Ground |
| Broche 66 | VDDIO — I/O supply voltage |
| Broche 67 | PC00 — GPIO PC00 |
| Broche 68 | PC01 — GPIO PC01 |
| Broche 69 | PC02 — GPIO PC02 |
| Broche 70 | PC03 — GPIO PC03 |
| Broche 71 | PC04 — GPIO PC04 |
| Broche 72 | PC05 — GPIO PC05 |
| Broche 73 | PC06 — GPIO PC06 |
| Broche 74 | PC07 — GPIO PC07 |
| Broche 75 | PC08 — GPIO PC08 / SD HC DETECT |
| Broche 76 | PC09 — GPIO PC09 / SD HC WRITE PROTECT |
| Broche 77 | PC10 — GPIO PC10 / SD HC CMD |
| Broche 78 | PC11 — GPIO PC11 / SD HC CK |
| Broche 79 | PA10 — GPIO PA10 alt / SD HC DATA0 (duplicated) |
| Broche 80 | PD00 — GPIO PD00 / SD HC DATA1 |
| Broche 81 | PD01 — GPIO PD01 / SD HC DATA2 |
| Broche 82 | PD02 — GPIO PD02 / SD HC DATA3 |
| Broche 83 | PD03 — GPIO PD03 |
| Broche 84 | PD04 — GPIO PD04 |
| Broche 85 | PD05 — GPIO PD05 |
| Broche 86 | PD06 — GPIO PD06 |
| Broche 87 | PD07 — GPIO PD07 |
| Broche 88 | PD08 — GPIO PD08 |
| Broche 89 | PD09 — GPIO PD09 |
| Broche 90 | PD10 — GPIO PD10 |
| Broche 91 | PD11 — GPIO PD11 |
| Broche 92 | PD12 — GPIO PD12 |
| Broche 93 | GND — Ground |
| Broche 94 | VDDIO — I/O supply voltage |
| Broche 95 | XIN — Crystal oscillator input (12 MHz) |
| Broche 96 | XOUT — Crystal oscillator output (12 MHz) |
| Broche 97 | GND — Ground |
| Broche 98 | RESET — Reset (active low) |
| Broche 99 | VDDIO — I/O supply voltage |
| Broche 100 | PB00 — GPIO PB00 |
Applications typiques
ATSAMD51N20A-AU convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAMD51N20A-AU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- On-chip USB High-Speed PHY eliminates external ULPI transceiver (vs ATSAMD21J18A-AU)
- Hardware FPU at 120 MHz Cortex-M4F for DSP and floating point (vs ATSAMD51J19A-AU)
- 1 MB dual-panel Flash with ECC for safe firmware updates (vs ATSAMD51N19A-AUT-EFP)
Notes de conception
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().
Informations de conformité
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.
