ATSAMD20G18A-AUT - 48MHz Cortex-M0+ MCU 256KB Flash | Microchip
MPN: ATSAMD20G18A-AUT ✓ فعالATSAMD20G18A-AUT جائزہ
An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed by Arm for energy-efficient embedded use. It implements the Thumb-2 instruction subset and typically reaches 0.9 DMIPS/MHz while consuming far less dynamic power than older Cortex-M3/M4 cores, making it ideal for battery-powered and always-on products. Within the broader microcontroller taxonomy it sits below Cortex-M3/M4 parts but above 8-bit AVR/PIC cores in both performance and energy efficiency, and it powers the entire SAM D family of microcontrollers.
Key features include six SERCOM blocks, each independently configurable as USART, I2C, or SPI; a 12-bit 350 ksps ADC with up to 14 channels; a 10-bit 350 ksps DAC; full-speed USB 2.0 device (on selected variants); and an Event System for inter-peripheral signalling without CPU wake-up. Power domains are organized into RUN, IDLE, STANDBY, and BACKUP modes, with sleep current as low as a few microamps depending on configuration, enabling multi-year coin-cell battery life.
The device uses a two-stage AHB/APB bus matrix with deterministic interrupt latency of 12 cycles. The 256 KB Flash is ECC-protected in 4 KB blocks, and the 32 KB SRAM is split into primary and low-power backup sections. A Real-Time Clock with calendar mode and a 32 kHz crystal driver support timekeeping in BACKUP mode.
Typical applications include home-automation gateways, smart-metering endpoints, HVAC sensor nodes, automotive body and HMI controllers, low-cost consumer appliances, and industrial sensor hubs. The wide operating voltage range of 1.62 V to 3.63 V lets the part run directly from a single Li-ion or 2x AA battery stack.
When designing with this part, pay close attention to decoupling and trace length on the analog AVVDD rail; place a 100 nF ceramic directly at each AVDD pin and a 10 uF bulk nearby. Configure unused pins as input with internal pull-up and disable unused peripherals in the PMUX/CLOCK registers to minimize sleep current.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not collected in any single manufacturer document.
کے لیے ڈراپ اِن متبادل ATSAMD20G18A-AUT — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ATSAMD20G18A-AUT (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف ADC, Package, Operating Temperature, DAC, Core Architecture.
ATSAMD20G18A-AU
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAMD20G18A-ANT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAMD20G17A-AUT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAMD20G16B-AUT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAMD20G15A-AU
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAMD21G18A-AUT
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ATSAMC21G18A-AUT
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATSAMD20G18A-AUT زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Family | SAM D20 |
| Series | ATSAMD20G |
| Maximum CPU Frequency | 48 MHz |
| Program Flash Memory | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| پیکیج | 48-TQFP (7x7 mm) |
| پن کی تعداد | 48 |
| ماؤنٹنگ ٹائپ | Surface Mount |
| Operating Temperature Range (Automotive Grade) | -40 C to +85 C |
| ADC | 12-bit, up to 14 channels, 350 ksps |
| DAC | 10-bit, 350 ksps |
| Peripheral Touch Controller (PTC) | Up to 256 channels |
| Communication Interfaces | 6x SERCOM (USART/I2C/SPI), I2S |
| Timers | 16-bit TC x6, 32-bit TCC x2, RTC |
| RoHS اسٹیٹس | Compliant |
| MSL لیول | MSL3 (168 hours) |
ATSAMD20G18A-AUT پن کنفیگریشن
| پن 1 | PA00 — GPIO / SERCOM1 PAD0 / TCC2 WO[0] |
| پن 2 | PA01 — GPIO / SERCOM1 PAD1 / TCC2 WO[1] |
| پن 3 | PA02 — GPIO / SERCOM0 PAD0 / ADC AIN0 / DAC VOUT |
| پن 4 | PA03 — GPIO / SERCOM0 PAD1 / ADC AIN1 / VREFA |
| پن 5 | PA04 — GPIO / SERCOM0 PAD2 / ADC AIN2 |
| پن 6 | PA05 — GPIO / SERCOM0 PAD3 / ADC AIN3 |
| پن 7 | PA06 — GPIO / SERCOM0 PAD0 (alt) / ADC AIN6 |
| پن 8 | PA07 — GPIO / SERCOM0 PAD1 (alt) / ADC AIN7 |
| پن 9 | VDDIO — Digital I/O supply (1.62 V to 3.63 V) |
| پن 10 | GND — Ground |
| پن 11 | PA08 — GPIO / SERCOM2 PAD0 / ADC AIN8 |
| پن 12 | PA09 — GPIO / SERCOM2 PAD1 / ADC AIN9 |
| پن 13 | PA10 — GPIO / SERCOM2 PAD2 / ADC AIN10 |
| پن 14 | PA11 — GPIO / SERCOM2 PAD3 / ADC AIN11 |
| پن 15 | PA12 — GPIO / SERCOM4 PAD0 |
| پن 16 | PA13 — GPIO / SERCOM4 PAD1 |
| پن 17 | PA14 — GPIO / SERCOM4 PAD2 / XIN32 |
| پن 18 | PA15 — GPIO / SERCOM4 PAD3 / XOUT32 |
| پن 19 | PA16 — GPIO / SERCOM1 PAD0 (alt) / I2S SD0 |
| پن 20 | PA17 — GPIO / SERCOM1 PAD1 (alt) / I2S MCK0 |
| پن 21 | PA18 — GPIO / SERCOM1 PAD2 (alt) / I2S FS0 |
| پن 22 | PA19 — GPIO / SERCOM1 PAD3 (alt) / I2S SCK0 |
| پن 23 | PA20 — GPIO / SERCOM5 PAD2 / GCLK_IO4 |
| پن 24 | PA21 — GPIO / SERCOM5 PAD3 / GCLK_IO5 |
| پن 25 | PA22 — GPIO / SERCOM3 PAD0 / GCLK_IO6 |
| پن 26 | PA23 — GPIO / SERCOM3 PAD1 / USB SOF 1kHz (D21 only) |
| پن 27 | PA24 — GPIO / SERCOM3 PAD2 / USB DP (D21 only) |
| پن 28 | PA25 — GPIO / SERCOM3 PAD3 / USB DM (D21 only) |
| پن 29 | GND — Ground |
| پن 30 | VDDCORE — Internal core LDO output (decouple with 1uF) |
| پن 31 | PA26 — GPIO |
| پن 32 | PA27 — GPIO |
| پن 33 | PA28 — GPIO |
| پن 34 | PA29 — GPIO / BOOT_INPUT |
| پن 35 | PA30 — GPIO / SWCLK (programming) |
| پن 36 | PA31 — GPIO / SWDIO (programming) |
| پن 37 | PB00 — GPIO |
| پن 38 | PB01 — GPIO |
| پن 39 | PB02 — GPIO / SERCOM5 PAD0 |
| پن 40 | PB03 — GPIO / SERCOM5 PAD1 |
| پن 41 | PB04 — GPIO / SERCOM4 PAD0 (alt) |
| پن 42 | PB05 — GPIO / SERCOM4 PAD1 (alt) |
| پن 43 | PB06 — GPIO / SERCOM4 PAD2 (alt) |
| پن 44 | PB07 — GPIO / SERCOM4 PAD3 (alt) |
| پن 45 | PB08 — GPIO |
| پن 46 | PB09 — GPIO |
| پن 47 | AVSS — Analog ground |
| پن 48 | VDDANA — Analog supply (1.62 V to 3.63 V) |
عام استعمالات
ATSAMD20G18A-AUT کے لیے موزوں ہے 8 ایپلیکیشنs: Home Automation Gateway, Smart Metering Endpoints, Automotive Body and HMI Controllers, Industrial Sensor Hubs, Wearable Fitness Devices, HVAC Climate Control, Low-Cost Consumer Appliances, Battery-Operated Sensor Nodes.
Home Automation Gateway
The ATSAMD20G18A-AUT is a strong fit for home-automation gateway nodes where it must bridge low-speed wireless sensor networks to Wi-Fi or Ethernet backhaul. Its six SERCOM blocks can simultaneously host RS-485 to a metering bus, SPI to an NVRAM, I2C to a sensor front-end, and a UART console, while the Cortex-M0+ core runs a TLS stack or Matter commissioning sequence. The 256 KB Flash comfortably accommodates OTA bootloader + application partitions, and the 1.62 V-3.63 V range lets the part share a 3.3 V rail with the radio module. STANDBY current in the low microamp range lets battery-backed sensors sleep for years.
تجویز کردہ
Smart Metering Endpoints
The ATSAMD20G18A-AUT suits smart electricity, gas, and water metering endpoints thanks to its 12-bit 350 ksps ADC and 256-channel Peripheral Touch Controller. Energy-meter front-ends need simultaneous voltage and current sampling at 4 ksps, which the ATSAMD20G18A-AUT handles using two ADC channels triggered by a TCC timer; the Cortex-M0+ then computes RMS and harmonic content. BACKUP mode with RTC retention lets a battery-backed meter survive line power loss while continuing time-stamped logging, and the AEC-Q100 qualification supports outdoor meter enclosures in hot climates.
تجویز کردہ
Automotive Body and HMI Controllers
The ATSAMD20G18A-AUT is well-suited to automotive body controllers, HVAC HMI panels, and small interior LIN/CAN nodes. AEC-Q100 qualification, 48-TQFP automotive temperature range, and 256 KB Flash accommodate AUTOSAR-friendly layered stacks plus bootloaders. The six SERCOM instances can drive LIN transceivers, a stepper motor for HVAC vents, and SPI displays, while the 12-bit ADC reads NTC temperature sensors. Low STANDBY current keeps quiescent draw below typical automotive 100 uA key-off budgets when the vehicle is parked.
تجویز کردہ
Industrial Sensor Hubs
For industrial 4-20 mA loop-powered sensor hubs, the ATSAMD20G18A-AUT offers 1.62 V-3.63 V operation that lets it ride the loop supply directly. The Cortex-M0+ reads 4-20 mA current via a 12-bit ADC channel, scales the value, and transmits via RS-485 using a dedicated SERCOM UART. Two TCC timers generate accurate PWM outputs for proportional valve control, while the Event System wakes the CPU only on a real threshold crossing, keeping average power draw in the hundreds of microwatts. The 256 KB Flash stores calibration tables and Modbus protocol stacks.
تجویز کردہ
Wearable Fitness Devices
The ATSAMD20G18A-AUT fits inside low-cost fitness bands and BLE-paired wearables thanks to its low-power sleep modes and small 48-TQFP footprint. The 12-bit ADC reads optical heart-rate sensor outputs, while SERCOM3 in I2C mode talks to a MEMS accelerometer. STANDBY mode with RTC wake keeps idle current under 5 uA, letting a 100 mAh Li-Po battery last 1-2 weeks between charges. The 256 KB Flash stores firmware update buffers and simple activity-classification models without external storage.
تجویز کردہ
HVAC Climate Control
The ATSAMD20G18A-AUT is ideal for HVAC wall thermostats and indoor climate sensors where it reads NTC temperature, capacitive humidity sensors, and CO2 modules via I2C. The 256-channel PTC supports capacitive touch buttons for the thermostat UI, while two TCC channels generate PWM outputs to drive triac-fired fan stages. BACKUP mode with RTC retention lets the thermostat maintain clock and schedules through brief power outages, and the AEC-Q100 grade tolerates harsh attic-mount environments with extended temperature ranges.
تجویز کردہ
Low-Cost Consumer Appliances
For coffee machines, air purifiers, and small kitchen appliances, the ATSAMD20G18A-AUT offers enough Flash (256 KB) for graphical menu UIs and BLE pairing stacks without crossing into higher-cost Cortex-M4 territory. SERCOM ports drive segment LCDs, NTC temperature probes, and a brushless DC motor through a companion gate driver, while the 12-bit ADC reads current-sense for soft-start. The 1.62 V-3.63 V range simplifies USB-powered designs and removes the need for an LDO in many mains-isolated topologies.
تجویز کردہ
Battery-Operated Sensor Nodes
Coin-cell or 2x AA battery sensor nodes benefit from the ATSAMD20G18A-AUT's 1.62 V-3.63 V operating range and microamp-level BACKUP mode. A 32 kHz crystal keeps RTC time while consuming roughly 1 uA, and the Event System wakes the Cortex-M0+ on a SERCOM UART edge or ADC window-comparator match without software polling. The 256 KB Flash accommodates over-the-air firmware updates with a dual-bank bootloader, and 32 KB SRAM is sufficient for TLS handshake scratch buffers in Matter/Thread commissioning flows.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ATSAMD20G18A-AUT — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ATSAMD20G18A-AU | ATSAMD20G18A-ANT | ATSAMD20G17A-AUT | ATSAMD20G16B-AUT | ATSAMD20G15A-AU | ATSAMD21G18A-AUT | ATSAMC21G18A-AUT |
|---|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) |
| Flash Memory | 256 KB | 256 KB | 256 KB | 128 KB | 64 KB | 32 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 8 KB | 4 KB | 32 KB | 32 KB |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Core | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ |
| Automotive Grade | Yes (-AUT, AEC-Q100) | No (industrial) | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | No (industrial) | Yes (AEC-Q100) | Yes (AEC-Q100) |
| USB 2.0 FS Device | No | No | No | No | No | No | Yes | Yes |
| Operating Voltage | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 2.7 V to 5.5 V |
| Approx. Unit Price (1k qty) | $2.84 | $2.80 | $2.95 | $2.50 | $2.20 | $2.00 | $3.30 | $3.80 |
اہم امتیازی خصوصیات
- Automotive-grade qualification in the same 48-TQFP pinout as the industrial variant (بمقابلہATSAMD20G18A-AU)
- Largest Flash and SRAM in the SAM D20G 48-TQFP family (بمقابلہATSAMD20G17A-AUT / ATSAMD20G16B-AUT)
- Drop-in pin compatibility with the ATSAMD21G18A-AUT upgrade path (بمقابلہATSAMD21G18A-AUT)
ڈیزائن نوٹس
The ATSAMD20G18A-AUT uses separate VDDIO and VDDANA rails that must both be tied to the same 1.62 V-3.63 V source. Place a 100 nF X7R decoupling capacitor within 3 mm of each VDD pin and a shared 4.7 uF bulk on the analog rail. The internal 1.2 V core LDO output at VDDCORE (pin 30) requires a 1 uF X7R capacitor; never drive VDDCORE from an external supply. Use the PMUX/CLOCK register to disable unused SERCOM and ADC peripherals in BACKUP mode to reach low-microamp sleep currents.
Estimated: at 48 MHz full-load on all peripherals, the ATSAMD20G18A-AUT draws roughly 9 mA from 3.3 V, dissipating approximately 30 mW. The 48-TQFP (7x7 mm) has a theta_JA of roughly 60 C/W on a 2-layer JEDEC test board, giving a junction rise of only 2 C above ambient. For enclosed housings without airflow, derate the ambient by 10-15 C and verify with thermocouple measurements on a prototype. The automotive grade is rated -40 C to +85 C ambient.
Route the SWD signals (SWCLK on PA30, SWDIO on PA31) as a 4-6 mil microstrip with ground reference, kept under 50 mm and isolated from switching nodes like TCC PWM outputs and the XIN/XOUT crystal traces. Place the 32.768 kHz crystal within 5 mm of XIN32/XOUT32 (PA14/PA15) with a grounded guard ring, and keep its traces symmetric. Route the analog AVSS/VDDANA pair as a star from a ferrite bead if the digital supply is shared with a noisy source.
Avoid enabling the 12-bit ADC and 10-bit DAC without first calibring them through the CALIB register; uncalibrated readings can vary by up to 8 LSB. Never apply voltage to any GPIO before VDDIO has ramped, or you risk latch-up via the ESD protection diodes; a 100 kohm series resistor on exposed connectors mitigates this. Do not forget to set the NVMCTRL_CTRLB.RWS (read wait-state) field when running above 24 MHz; the Flash needs one additional wait state at 48 MHz to avoid data corruption.
تعمیل کی معلومات
AEC-Q100 qualified per automotive-grade -AUT suffix. RoHS and REACH compliance confirmed via Microchip product declaration. Lead-free matte-tin termination.
