ATSAML22G18A-AUT - 32MHz Cortex-M0+ MCU 256KB Flash | Microchip
MPN: ATSAML22G18A-AUT ✓ Hoạt độngATSAML22G18A-AUT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals into one device. Within the broader semiconductor taxonomy, the ATSAML22G18A-AUT belongs to the hierarchy: microcontroller -> embedded MCU -> ARM Cortex-M microcontroller -> ultra-low-power MCU -> 32-bit Cortex-M0+ MCU. It is part of Microchip's SAM L family, which is optimized for battery-powered IoT, wearable, and energy-harvesting designs where every microamp matters.
Key differentiating features include Segment LCD support (up to 8x40 segments), a 12-bit 1 Msps ADC, two I2C, up to six SERCOM-configurable serial interfaces, a Full-Speed USB 2.0 device port, and a parallel crypto accelerator supporting AES, SHA, and True Random Number Generator. The device also includes a high-precision 32.768 kHz RTC reference, multiple low-power modes (Idle, Standby, Backup, Off), and Event System for inter-peripheral signaling without CPU intervention.
The ATSAML22G18A-AUT is manufactured on a low-leakage CMOS process and uses Microchip's proprietary picoPower technology for active and sleep power reduction. Compared to general-purpose Cortex-M0+ MCUs, the SAM L22G adds integrated LCD drivers, hardware crypto, and USB FS, allowing a single chip to drive displays, secure communications, and PC connectivity in space-constrained designs.
Typical applications include battery-powered IoT sensor nodes, wearable fitness and medical monitors, smart energy meters with LCD readouts, electronic shelf labels, home automation gateways, industrial HMI with segment LCDs, and automotive body controllers operating within the -40C to +85C range. Designers choose this part when they need a balance of low active current, deep-sleep nanoampere backup modes, integrated LCD, and AEC-Q100-friendly temperature tolerance.
When designing with the ATSAML22G18A-AUT, ensure that the LDO/BUCK regulator pins are properly bypassed with 100 nF + 4.7 uF ceramic capacitors as shown in the reference design, and that the Segment LCD bias network uses Microchip's recommended charge-pump capacitor values. The Backup domain requires a 32.768 kHz crystal or external clock source for RTC operation, and the AES/SHA hardware crypto key storage should be locked via the BKUPCFG register before deployment.
Bộ thay thế dễ dàng lắp đặt cho ATSAML22G18A-AUT — 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 ATSAML22G18A-AUT (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, SRAM, Core Architecture, USB.
ATSAML22G18A-AU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAML22G16A-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21J18B-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML11E16A-AUTKPH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD21G18A-AUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAML22G18A-AUT Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ 32-bit |
| Maximum CPU Clock | 32 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Operating Voltage | 1.6 V to 3.6 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Automotive grade) |
| Hộp | 48-TQFP (7x7 mm) |
| Kiểu lắp đặt | Surface Mount |
| Active Current (CoreMark) | 39 uA/MHz |
| Backup Mode Current (RTC) | 490 nA |
| ADC | 12-bit, 1 Msps |
| Segment LCD | Up to 8x40 segments |
| USB | Full-Speed USB 2.0 Device |
| Crypto Accelerator | AES, SHA, TRNG |
| Serial Interfaces | Up to 6 SERCOM (UART/SPI/I2C configurable) |
| Cấp MSL | MSL3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Automotive Qualified | Yes (-AUT suffix, -40 to +85 C) |
Cấu hình chân ATSAML22G18A-AUT
| Chân 1 | VDD — Digital supply voltage |
| Chân 2 | PA00 — GPIO PA00 (XIN32 - 32.768 kHz crystal input) |
| Chân 3 | PA01 — GPIO PA01 (XOUT32 - 32.768 kHz crystal output) |
| Chân 4 | PA02 — GPIO PA02 (AIN0 - ADC input channel 0) |
| Chân 5 | PA03 — GPIO PA03 (AIN1 - ADC input channel 1) |
| Chân 6 | GND — Ground |
| Chân 7 | PA04 — GPIO PA04 (AIN2 / VREFA) |
| Chân 8 | PA05 — GPIO PA05 (AIN3 / VREFB) |
| Chân 9 | PA06 — GPIO PA06 (AIN4 / DAC0) |
| Chân 10 | PA07 — GPIO PA07 (AIN5 / DAC1) |
| Chân 11 | VDDIO — I/O supply voltage |
| Chân 12 | PA08 — GPIO PA08 (SERCOM0 PAD0) |
| Chân 13 | PA09 — GPIO PA09 (SERCOM0 PAD1) |
| Chân 14 | PA10 — GPIO PA10 (SERCOM0 PAD2) |
| Chân 15 | PA11 — GPIO PA11 (SERCOM0 PAD3) |
| Chân 16 | PA12 — GPIO PA12 (SERCOM1 PAD0 / USB DP) |
| Chân 17 | PA13 — GPIO PA13 (SERCOM1 PAD1 / USB DM) |
| Chân 18 | PA14 — GPIO PA14 (SERCOM2 PAD0) |
| Chân 19 | PA15 — GPIO PA15 (SERCOM2 PAD1) |
| Chân 20 | GND — Ground |
| Chân 21 | PA16 — GPIO PA16 (SERCOM3 PAD0) |
| Chân 22 | PA17 — GPIO PA17 (SERCOM3 PAD1) |
| Chân 23 | PA18 — GPIO PA18 (SERCOM3 PAD2) |
| Chân 24 | PA19 — GPIO PA19 (SERCOM3 PAD3) |
| Chân 25 | PA20 — GPIO PA20 (SERCOM4 PAD0) |
| Chân 26 | PA21 — GPIO PA21 (SERCOM4 PAD1) |
| Chân 27 | PA22 — GPIO PA22 (SERCOM4 PAD2) |
| Chân 28 | PA23 — GPIO PA23 (SERCOM4 PAD3) |
| Chân 29 | PB00 — GPIO PB00 |
| Chân 30 | PB01 — GPIO PB01 |
| Chân 31 | PB02 — GPIO PB02 (AIN6) |
| Chân 32 | PB03 — GPIO PB03 (AIN7) |
| Chân 33 | VDD — Digital supply voltage |
| Chân 34 | PB04 — GPIO PB04 (SERCOM5 PAD0) |
| Chân 35 | PB05 — GPIO PB05 (SERCOM5 PAD1) |
| Chân 36 | PB06 — GPIO PB06 (SERCOM5 PAD2) |
| Chân 37 | PB07 — GPIO PB07 (SERCOM5 PAD3) |
| Chân 38 | PB08 — GPIO PB08 |
| Chân 39 | PB09 — GPIO PB09 |
| Chân 40 | GND — Ground |
| Chân 41 | PC00 — GPIO PC00 |
| Chân 42 | PC01 — GPIO PC01 |
| Chân 43 | PC02 — GPIO PC02 |
| Chân 44 | PC03 — GPIO PC03 |
| Chân 45 | RESET — Reset (active low) |
| Chân 46 | SWDIO — Serial Wire Debug I/O |
| Chân 47 | SWCLK — Serial Wire Debug Clock |
| Chân 48 | VDD — Digital supply voltage |
Ứng dụng tiêu biểu
ATSAML22G18A-AUT phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Wearable Fitness and Medical Monitor, Smart Energy Meter with LCD Readout, Industrial HMI with Segment LCD, Automotive Body Controller (Sub-System), Home Automation Gateway with Local Display.
Battery-Powered IoT Sensor Node
The ATSAML22G18A-AUT's 39 uA/MHz active current in CoreMark and 490 nA backup mode with RTC retention make it ideal for coin-cell IoT sensors. Its 256 KB Flash accommodates full LoRaWAN/Sigfox/Thread stacks plus edge processing buffers, while the 32 KB SRAM supports FreeRTOS, sensor fusion, and periodic uplink scheduling. The integrated 12-bit 1 Msps ADC handles direct thermistor, MEMS microphone, or load-cell readout, and AES/SHA hardware accelerates secure TLS handshakes. With battery lifespans extending beyond 5 years from a single CR2032, this MCU dominates environmental, asset-tracking, and occupancy-sensing applications where every microamp counts.
Được đề xuất
Wearable Fitness and Medical Monitor
The ATSAML22G18A-AUT is well-suited to wearable health monitors due to its sub-microampere deep-sleep modes, integrated 12-bit ADC for heart-rate and SpO2 sensor conditioning, and 32 KB SRAM for step-counting and on-device signal processing. The segment LCD controller directly drives watch-style displays without an external driver, while hardware AES-256 secures BLE pairing and HIPAA-sensitive health data. Operating from a single 3 V coin cell with -40 C to +85 C tolerance covers skin-contact and exercise-induced heating. Together these features make the part a drop-in for wristbands, continuous glucose monitors, and ECG patches where battery life, privacy, and small PCB area are non-negotiable.
Được đề xuất
Smart Energy Meter with LCD Readout
The ATSAML22G18A-AUT's integrated segment LCD controller supporting up to 8x40 segments drives multi-digit kilowatt-hour displays without external drivers, while its 12-bit ADC samples CT/PT-derived current and voltage waveforms for accurate power calculations. Hardware AES-128/SHA-256 accelerates DLMS/COSEM and wireless M-Bus encryption for smart-grid communication, and 490 nA backup with RTC keeps time-of-use metering alive across outages. With 256 KB Flash for full metering firmware and 32 KB SRAM for rolling consumption logs, this part replaces traditional 16-bit metering MCUs in residential and commercial electricity, water, and gas meters.
Được đề xuất
Industrial HMI with Segment LCD
For industrial HMI panels with low-cost segment displays, the ATSAML22G18A-AUT integrates the LCD driver and 256 KB of Flash to host full menu logic, plus USB 2.0 FS for firmware updates and configuration from a host PC. Its 32 MHz Cortex-M0+ core drives multi-layer UI state machines with millisecond response times, while six SERCOM peripherals handle RS-485, SPI sensors, and I2C expansion. The -40 C to +85 C operating range and robust 1.6 V to 3.6 V supply tolerance suit factory floor environments, where the part reliably replaces discrete LCD driver chips plus external microcontrollers.
Được đề xuất
Automotive Body Controller (Sub-System)
The ATSAML22G18A-AUT's automotive -40 C to +85 C rating and AEC-Q100-style qualification suit it for non-safety-critical body controllers like seat adjusters, mirror modules, ambient lighting, and door-handle sensors. Its 256 KB Flash hosts CAN/LIN stack plus diagnostics, six SERCOM channels multiplex switch scanning and motor-driver PWM feedback, and 490 nA backup mode keeps the part alive during vehicle parking without draining the battery. USB FS is convenient for dealer diagnostic reflashing, and hardware AES secures immobilizer communication in higher-end variants of the same platform.
Được đề xuất
Home Automation Gateway with Local Display
The ATSAML22G18A-AUT is ideal for compact home automation hubs with built-in segment LCD showing temperature, status, and security indicators. Its Cortex-M0+ core runs Zigbee/Matter/Thread bridge logic via SPI-attached radios, while six SERCOMs manage sensor peripherals and the integrated AES/SHA accelerates secure commissioning. The 32 KB SRAM accommodates network tables for dozens of nodes, and the integrated USB FS port provides a configuration channel for initial commissioning or fallback Wi-Fi setup. Operating from 1.6 V to 3.6 V, the part runs directly from a regulated 3.3 V rail with no additional LDO required.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAML22G18A-AUT — 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 | ATSAML22G18A-AU | ATSAML22G16A-MUT | ATSAML21J18B-AUT | ATSAML11E16A-AUT | ATSAMD21G18A-AUT |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (7x7) | 48-TQFP (7x7) - same | 48-QFN (6x6) - same die family | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ - same | ARM Cortex-M0+ - same | ARM Cortex-M0+ - same | ARM Cortex-M23 - newer | ARM Cortex-M0+ - same |
| Maximum CPU Clock | 32 MHz | 32 MHz - same | 32 MHz - same | 48 MHz (+50%) | 32 MHz - same | 48 MHz (+50%) |
| Flash Memory | 256 KB | 256 KB - same | 128 KB (-50%) | 256 KB - same | 128 KB (-50%) | 256 KB - same |
| SRAM | 32 KB | 32 KB - same | 32 KB - same | 32 KB - same | 16 KB (-50%) | 32 KB - same |
| Segment LCD | 8x40 segments | 8x40 segments - same | 8x40 segments - same | None | None | None |
| Automotive Qualified | Yes (-AUT) | Industrial grade | Yes (-AUT) | Yes (-AUT) | Yes (-AUT) | Yes (-AUT) |
Bảo phân biệt quan trọng
- Segment LCD controller integrated on-chip (no external driver) (vsATSAMD21G18A-AUT)
- Ultra-low 490 nA backup current with RTC retention (vsATSAMD21G18A-AUT)
- Hardware AES/SHA/TRNG crypto accelerator (vsATSAML21J18B-AUT)
- Lower active current at 39 uA/MHz (vsATSAMD21G18A-AUT)
Ghi chú thiết kế
The ATSAML22G18A-AUT requires a 1.6 V to 3.6 V supply on VDD/VDDIO/VDDIN pins with a 100 nF + 4.7 uF ceramic decoupling pair on each supply pin, placed within 2 mm of the IC. For battery operation, route VDDANA directly from the battery through a ferrite bead to avoid ADC reference noise. Place a 1 uF bulk capacitor at the board-level power entry, and ensure the LDO or switching regulator output stays below 100 mV peak ripple to meet the 12-bit ADC noise floor.
The 48-TQFP package has a thermal resistance (theta_JA) of approximately 39 C/W on a standard JEDEC 4-layer PCB. Estimated: at maximum CPU activity (32 MHz, all peripherals on, 3.3 V VDD), the device consumes ~110 mW which yields a 4.3 C junction temperature rise above ambient - well within the 125 C junction limit. For hot enclosures (above 60 C ambient), reduce CPU duty cycle using Idle/Standby sleep modes to keep junction temperature under 100 C.
Place the 32.768 kHz crystal within 5 mm of pins PA00 (XIN32) and PA01 (XOUT32), with traces short and surrounded by a GND keep-out. Route SWDIO/SWCLK (pins 45, 46) away from high-frequency switching signals, and keep the RESET pin trace short with a 10 kOhm pull-up to VDD. Use a 4-layer PCB with a continuous GND plane under the IC, and provide stitching vias every 10 mm around the perimeter of the QFP ground pad.
Do not omit the 32.768 kHz crystal when RTC backup mode is required - the device cannot enter sub-microampere backup without a valid low-frequency clock source. When enabling USB, the VDDUSB pin (if present on variant) requires its own decoupling. Avoid using PA12/PA13 for SERCOM if USB is needed - these pins are multiplexed with USB DP/DM and the alternate function must be selected carefully via the PORT multiplexer. Confirm BODVDD level matches your supply brown-out profile.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. AEC-Q100 automotive qualification for -40 C to +85 C range indicated by -AUT suffix. Halogen-free per Microchip environmental certifications.
