ATSAM3N0CA-AU - ARM Cortex-M3 MCU 48MHz 32KB Flash | Microchip
部品番号: ATSAM3N0CA-AU ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.75 | $47.50 |
| 100 | $4.3 | $430.00 |
| 500 | $3.95 | $1,975.00 |
| 1,000 | $3.6 | $3,600.00 |
ATSAM3N0CA-AU 概要
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest tier of the embedded processing hierarchy (MCU -> embedded processor -> application processor -> SoC). The SAM3N family belongs to Microchip's (formerly Atmel) ARM-based flash MCU portfolio, positioned for cost-sensitive, high-volume designs that still require 32-bit performance.
Key features include the ARM Cortex-M3 revision 2.0 core with Thumb-2 instruction set, a Nested Vector Interrupt Controller (NVIC), and a 24-bit SysTick timer. The device integrates 16 channels of 10-bit ADC (440 ksps), one 10-bit DAC, and supply operation from 1.62V to 3.6V. Peripherals such as USART, SPI, TWI (I2C), PWM, and a Real-Time Clock support typical embedded connectivity and control tasks.
Architecturally, the SAM3N series achieves high EMI tolerance and low power consumption, with multiple sleep modes and a VDDBU domain for RTC/backup operation. The flash-based program memory supports In-System Programming (ISP) via UART, and the core integrates a single-cycle multiply for DSP-style arithmetic.
Typical applications include industrial control nodes, building automation, metering front-ends leveraging the 16-channel ADC, consumer appliance control boards, and cost-optimized Human-Machine Interface systems where the migration path to higher-memory SAM3S parts matters.
Design consideration: the SAM3N series is pin-to-pin compatible with SAM7S and SAM3S devices, so designers should plan PCB footprints with memory upgrades in mind and verify ADC channel mapping when migrating.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ATSAM3N0CA-AU — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATSAM3N0CA-AU （同一形状・フットプリント） — 相違点: Core Processor, Program Memory Size, Instruction Set, Series, Package.
クイック比較ツール — 並列比較する代替部品を選択:
ATSAM3N1CB-AU
✅ ドロップイン✓ 在庫あり
$0.18 / 個
データシートを見る →ATSAM3S2CA-AU
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$4.25 / 個
データシートを見る →ATSAM3S4CA-AU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATSAM3S8CA-AU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATSAM3N0BA-AU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATSAM7S512-AU
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATSAM3N0CA-AU 最大定格＆電気的特性
| Core Processor | ARM Cortex-M3 (revision 2.0) |
| Core Size | 32-bit |
| 最大クロック周波数 | 48 MHz |
| Program Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 8K x 8 |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Data Converters | A/D 16x10b; D/A 1x10b |
| Oscillator Type | Internal |
| 動作温度 | -40C to +85C |
| パッケージ | 100-LQFP (14 x 14 mm) |
| 実装タイプ | Surface Mount |
| Series | SAM3N |
| Instruction Set | Thumb-2 |
| Interrupt Controller | NVIC (Nested Vector Interrupt Controller) |
| SysTick Timer | 24-bit |
| Family Compatibility | Pin-to-pin compatible with SAM7S and SAM3S |
| Green Status | LQFP, Green, IT, MRL A (per Mouser) |
| Connectivity Peripherals | USART, SPI, TWI (I2C) |
ATSAM3N0CA-AU ピン構成
| ピン 1 | PA0 — General purpose I/O / peripheral mux A |
| ピン 2 | PA1 — General purpose I/O / peripheral mux A |
| ピン 3 | PA2 — General purpose I/O / peripheral mux A |
| ピン 4 | PA3 — General purpose I/O / peripheral mux A |
| ピン 5 | PA4 — General purpose I/O / peripheral mux A |
| ピン 6 | PA5 — General purpose I/O / peripheral mux A |
| ピン 7 | PA6 — General purpose I/O / peripheral mux A |
| ピン 8 | PA7 — General purpose I/O / peripheral mux A |
| ピン 9 | PA8 — General purpose I/O / peripheral mux A |
| ピン 10 | PA9 — General purpose I/O / peripheral mux A |
| ピン 11 | PA10 — General purpose I/O / peripheral mux A |
| ピン 12 | PA11 — General purpose I/O / peripheral mux A |
| ピン 13 | VDDIO — I/O power supply (1.62V - 3.6V) |
| ピン 14 | GND — Ground |
| ピン 15 | PA12 — General purpose I/O / peripheral mux A |
| ピン 16 | PA13 — General purpose I/O / peripheral mux A |
| ピン 17 | PA14 — General purpose I/O / peripheral mux A |
| ピン 18 | PA15 — General purpose I/O / peripheral mux A |
| ピン 19 | PA16 — General purpose I/O / peripheral mux A |
| ピン 20 | PA17 — General purpose I/O / peripheral mux A |
| ピン 21 | PA18 — General purpose I/O / peripheral mux A |
| ピン 22 | PA19 — General purpose I/O / peripheral mux A |
| ピン 23 | PA20 — General purpose I/O / peripheral mux A |
| ピン 24 | PA21 — General purpose I/O / peripheral mux A |
| ピン 25 | PA22 — General purpose I/O / peripheral mux A |
| ピン 26 | PA23 — General purpose I/O / peripheral mux A |
| ピン 27 | PA24 — General purpose I/O / peripheral mux A |
| ピン 28 | PA25 — General purpose I/O / peripheral mux A |
| ピン 29 | PA26 — General purpose I/O / peripheral mux A |
| ピン 30 | PA27 — General purpose I/O / peripheral mux A |
| ピン 31 | PA28 — General purpose I/O / peripheral mux A |
| ピン 32 | PA29 — General purpose I/O / peripheral mux A |
| ピン 33 | PA30 — General purpose I/O / peripheral mux A |
| ピン 34 | PA31 — General purpose I/O / peripheral mux A |
| ピン 35 | PB0 — General purpose I/O / peripheral mux A |
| ピン 36 | PB1 — General purpose I/O / peripheral mux A |
| ピン 37 | PB2 — General purpose I/O / peripheral mux A |
| ピン 38 | PB3 — General purpose I/O / peripheral mux A |
| ピン 39 | PB4 — General purpose I/O / peripheral mux A |
| ピン 40 | PB5 — General purpose I/O / peripheral mux A |
| ピン 41 | PB6 — General purpose I/O / peripheral mux A |
| ピン 42 | PB7 — General purpose I/O / peripheral mux A |
| ピン 43 | PB8 — General purpose I/O / peripheral mux A |
| ピン 44 | PB9 — General purpose I/O / peripheral mux A |
| ピン 45 | PB10 — General purpose I/O / peripheral mux A |
| ピン 46 | PB11 — General purpose I/O / peripheral mux A |
| ピン 47 | PB12 — General purpose I/O / peripheral mux A |
| ピン 48 | PB13 — General purpose I/O / peripheral mux A |
| ピン 49 | TDI — JTAG Test Data Input |
| ピン 50 | TDO/TRACESYNC — JTAG Test Data Output |
| ピン 51 | TMS — JTAG Test Mode Select |
| ピン 52 | TCK — JTAG Test Clock |
| ピン 53 | VDDCORE — Core logic power (from internal regulator via VDDOUT) |
| ピン 54 | VDDOUT — Voltage regulator output - decouple to VDDCORE |
| ピン 55 | VDDIN — Voltage regulator input / main supply |
| ピン 56 | GND — Ground |
| ピン 57 | VDDPLL — PLL power supply - decouple with 100 nF |
| ピン 58 | GNDPLL — PLL ground reference |
| ピン 59 | XIN — Main crystal oscillator input |
| ピン 60 | XOUT — Main crystal oscillator output |
| ピン 61 | VDDIO — I/O power supply |
| ピン 62 | GND — Ground |
| ピン 63 | XIN32 — 32.768 kHz crystal oscillator input |
| ピン 64 | XOUT32 — 32.768 kHz crystal oscillator output |
| ピン 65 | VDDBU — Backup domain supply for RTC/backup registers |
| ピン 66 | NRST — Bidirectional reset with internal pull-up |
| ピン 67 | ERASE — Flash erase trigger (assert to clear flash security bit) |
| ピン 68 | TEST — Test mode pin - connect to GND in application |
| ピン 69 | USBDM — USB differential data minus (where supported on SAM3N derivatives) |
| ピン 70 | USBDP — USB differential data plus (where supported on SAM3N derivatives) |
| ピン 71 | AD0 — ADC channel 0 analog input (10-bit) |
| ピン 72 | AD1 — ADC channel 1 analog input |
| ピン 73 | AD2 — ADC channel 2 analog input |
| ピン 74 | AD3 — ADC channel 3 analog input |
| ピン 75 | AD4 — ADC channel 4 analog input |
| ピン 76 | AD5 — ADC channel 5 analog input |
| ピン 77 | AD6 — ADC channel 6 analog input |
| ピン 78 | AD7 — ADC channel 7 analog input |
| ピン 79 | AD8 — ADC channel 8 analog input |
| ピン 80 | AD9 — ADC channel 9 analog input |
| ピン 81 | AD10 — ADC channel 10 analog input |
| ピン 82 | AD11 — ADC channel 11 analog input |
| ピン 83 | AD12 — ADC channel 12 analog input |
| ピン 84 | AD13 — ADC channel 13 analog input |
| ピン 85 | AD14 — ADC channel 14 analog input |
| ピン 86 | AD15/DAC0 — ADC channel 15 / 10-bit DAC output |
| ピン 87 | ADVREF — ADC/DAC voltage reference input |
| ピン 88 | VDDIO — I/O power supply |
| ピン 89 | GND — Ground |
| ピン 90 | GND — Ground |
| ピン 91 | VDDIO — I/O power supply |
| ピン 92 | GND — Ground |
| ピン 93 | PA11/PCK — Multiplexed I/O (peripheral function) |
| ピン 94 | WKUP — Backup domain wake-up input |
| ピン 95 | GND — Ground |
| ピン 96 | VDDIO — I/O power supply |
| ピン 97 | GND — Ground |
| ピン 98 | VDDIO — I/O power supply |
| ピン 99 | GND — Ground |
| ピン 100 | VDDIO — I/O power supply |
主な用途
ATSAM3N0CA-AU の用途: 6 件s: Industrial Control and Automation Nodes, Utility Metering Front-Ends, Building Automation Sensors, Consumer Appliance Control Boards, Point-of-Sale and HMI Interfaces, Data Loggers and Portable Instruments.
Industrial Control and Automation Nodes
The ATSAM3N0CA-AU fits industrial control nodes where a 48 MHz Cortex-M3 core, 16-channel 10-bit ADC, and -40C to +85C operation are required at minimal BOM cost. USART, SPI, and TWI interfaces connect PLC I/O modules, sensors, and RS-485 transceivers, while the NVIC provides deterministic interrupt response for time-critical control loops. Placed as the main controller with a 3.3V rail and UART bootloader for field updates, it offers better integration than 8-bit MCUs and a pin-compatible upgrade path to SAM3S parts when USB or DMA is later needed. Its industrial temperature grade and low EMI design make it reliable in factory environments with switching loads.
おすすめ
Utility Metering Front-Ends
Metering designs benefit from the ATSAM3N0CA-AU's 16-channel 10-bit ADC, which multiplexes multiple current and voltage sensor inputs without an external analog front-end. The 10-bit DAC supports calibration signal generation, and the VDDBU domain maintains an RTC for timestamping consumption events during power outages. Running the 48 MHz Cortex-M3 core allows fixed-point RMS computation and tariff logic in a single chip supplied from 1.62V to 3.6V. The cost-optimized positioning of the SAM3N series - explicitly targeted at cost-sensitive, high-volume applications per Microchip - aligns directly with high-volume meter production, while the LQFP100 footprint preserves migration to higher-memory SAM3S variants if the feature set expands.
おすすめ
Building Automation Sensors
Battery-powered or low-power building automation nodes use the ATSAM3N0CA-AU's multiple sleep modes and backup domain to sleep between sensor reads while keeping the RTC running. The 16-channel ADC digitizes temperature, humidity, and occupancy sensors, and the TWI interface drives I2C environmental sensors and small OLED displays. With 32KB flash, the complete sensor, protocol stack, and power-management code fits comfortably, and firmware runs from flash with zero-wait access typical of the Cortex-M3 at 48 MHz. The LQFP100 package exposes 46 GPIOs, letting one MCU handle several sensing zones, reducing per-node BOM cost in dense deployments of thermostats, dampers, and occupancy controllers.
おすすめ
Consumer Appliance Control Boards
Washing machines, cooktops, and small appliances demand an MCU with robust ADC reading of encoder knobs and NTC sensors, PWM outputs for motor and heater drive, and industrial-grade reliability at consumer price points - all characteristics of the ATSAM3N0CA-AU. The 48 MHz Cortex-M3 handles PID control loops and touch-debounce logic, while the 10-bit DAC can generate audible alerts. Microchip's complete software library and tool ecosystem shortens development cycle time, and the SAM3N's aggressive price point pushes its scope into cost-sensitive, high-volume consumer boards. The 100-pin package provides enough GPIO for relays, LEDs, and a multiplexed display without port expanders.
おすすめ
Point-of-Sale and HMI Interfaces
Human-Machine Interface boards in POS terminals and industrial panels use the ATSAM3N0CA-AU to scan keypads or resistive touch overlays via its ADC, drive segment or small TFT displays over parallel/SPI buses, and communicate with the host over USART. The Cortex-M3 core with Thumb-2 instructions provides the processing headroom for GUI update tasks at 48 MHz, and 8KB SRAM accommodates a small framebuffer region for segment-LCD style UIs. The pin-to-pin compatibility with SAM7S and SAM3S lets product families share one PCB across cost tiers, migrating to USB-equipped SAM3S parts where receipt printing or host connectivity demands it. Supply from 1.8V to 3.6V simplifies battery and mains adapter designs alike.
おすすめ
Data Loggers and Portable Instruments
Portable data loggers exploit the ATSAM3N0CA-AU's low-power sleep modes, internal oscillator option, and 16-channel ADC to sample many analog inputs against a single-supply 1.62V to 3.6V domain, logging to SPI flash or SD-card media over the SPI peripheral. The 24-bit SysTick timer and RTC domain support accurate timestamping, while the 10-bit DAC provides stimulus for sensor self-test in instrument applications. The LQFP100 14 x 14 mm footprint is hand-assembly-friendly for prototyping yet compact enough for handheld enclosures, and the industrial -40C to +85C rating covers outdoor and vehicle-mounted logger deployments. UART ISP via the ROM bootloader enables firmware updates in the field without a JTAG connector.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATSAM3N0CA-AU — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATSAM3N1CB-AU | ATSAM3S2CA-AU | ATSAM3S4CA-AU | ATSAM3S8CA-AU | ATSAM7S512-AU |
|---|---|---|---|---|---|---|
| Package | 100-LQFP (14 x 14 mm) | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same | 100-LQFP (14 x 14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M3 @ 48 MHz | ARM Cortex-M3 @ 48 MHz | ARM Cortex-M3 @ up to 64 MHz | ARM Cortex-M3 @ up to 64 MHz | ARM Cortex-M3 @ up to 64 MHz | ARM7TDMI @ 55 MHz |
| Flash Memory | 32KB | 64KB | 64KB | 128KB | 256KB | 256KB |
| 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 | 1.62 V to 3.6 V |
| USB | No | No | Yes (high-speed USB Device with integrated transceiver) | Yes (high-speed USB Device) | Yes (high-speed USB Device) | Yes (USB 2.0 Full Speed) |
主な差別化要因
- Lowest-cost Cortex-M3 entry in the 100-pin family （vs ATSAM3S2CA-AU)
- Double-flash drop-in upgrade available （vs ATSAM3N1CB-AU)
- Modern Cortex-M3 core vs legacy ARM7 （vs ATSAM7S512-AU)
設計ノート
The ATSAM3N0CA-AU uses an on-chip voltage regulator: apply the 1.62V-3.6V supply at VDDIN and decouple VDDOUT with the capacitor value specified in the SAM3N datasheet power section, tying VDDOUT to VDDCORE. Decouple each VDDIO pair with 100 nF close to the pins plus one bulk 10 uF per supply domain. The VDDPLL pin needs a dedicated 100 nF capacitor placed within 2 mm of the pin - shared PLL decoupling is a common source of clock jitter in ADC-sampled designs. Keep VDDBU fed from a coin cell or always-on rail if RTC timestamping must survive main power loss.
For analog performance, route the 16 ADC channels (AD0-AD15) over a quiet ground region away from the USART/SPI switching traces, and use the ADVREF pin with a clean reference (RC filtered from the 3.3V rail or a dedicated reference IC). The ERASE and TEST pins must be handled deliberately: tie TEST to ground and pull ERASE low in production designs, since accidental assertion of ERASE clears flash content including the security bit. Reserve a 2x5 JTAG header footprint even if ISP-only is planned - it costs nothing at layout time and saves debugging later.
Do not exceed 48 MHz system clock on SAM3N devices - the family tops out at 48 MHz, unlike the 64 MHz SAM3S siblings, so do not port a SAM3S clock configuration unchanged. Flash is 32KB; enable compiler optimization (-Os) and check the map file before committing to peripherals-heavy stacks, or plan the ATSAM3N1CB-AU (64KB) as the same-footprint fallback. Migration between SAM3N, SAM3S, and SAM7S is pin-to-pin compatible per Microchip, but peripheral register maps differ, so budget firmware rework even when the PCB is unchanged.
コンプライアンス情報
Mouser listing describes the part as 'LQFP, Grn, IT, MRL A' - 'Grn' is Microchip's green (lead-free, halogen-free) package designation. Obtain the formal RoHS/REACH declaration from the Microchip compliance portal for specific date codes.