ATSAMD20G16B-MU - 48MHz ARM Cortex-M0+ MCU 64KB Flash | Microchip
MPN： ATSAMD20G16B-MU ✓ 啟用中ATSAMD20G16B-MU 概覽
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (flash), data memory (SRAM), and integrated peripherals such as timers, communication interfaces, and analog blocks. The SAM D20 family sits within Microchip's broader portfolio of ARM Cortex-M microcontrollers (Cortex-M0+ -> Cortex-M family -> ARM architecture -> 32-bit RISC processor), positioning this device as a low-power, high-performance tier suitable for general-purpose embedded designs.
Key features include 64KB flash with ECC and 8KB SRAM, a 12-bit 350 ksps analog-to-digital converter (ADC) with up to 14 channels, two 16-bit timers/counters for PWM and capture, multiple SERCOM interfaces supporting I2C, SPI, and UART, and a full-speed USB 2.0 device interface on selected variants. Power management includes an integrated SleepWalking peripheral event system, multiple low-power sleep modes with sub-microampere retention current, and a 32 kHz RTC operating from a separate low-power domain.
Architecturally, the ATSAMD20G16B-MU uses a single-cycle IO and peripheral bridge that allows deterministic interrupt response while maintaining low active power, typically drawing under 7 mA/MHz at full CPU load. The 12-bit ADC achieves effective ENOB above 11 bits under proper PCB grounding and reference decoupling, making the device suitable for sensor signal acquisition and metering.
Typical applications include home automation controllers, smart energy metering endpoints, consumer appliances with capacitive touch, industrial sensor nodes, and low-power IoT edge devices requiring USB connectivity or battery-friendly operation. The wide operating voltage range of 1.62V to 3.63V supports single-cell Li-ion or two-cell alkaline battery topologies.
When designing with this part, place a 100 nF decoupling capacitor as close as possible to each VDD pin and provide a low-impedance ground return for the exposed pad, which doubles as the thermal and electrical ground reference. Configure unused pins in INPUT_PULLUP with interrupts disabled to prevent parasitic current paths during sleep states.
直接替換替代品，適用於 ATSAMD20G16B-MU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMD20G16B-MU （相同外形與佔位） — 差異在於 Package, ADC, RoHS Status, DAC, Operating Temperature.
ATSAMD20G16B-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20G17B-MU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATSAMD20E16B-MU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATSAMD20G15B-MU
✅ 直接替換聯絡詢價
查看資料表 →STM32L011K4T6
✅ 直接替換聯絡詢價
查看資料表 →LPC11U68JBD48
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMD20G16B-MU 最大額定值與電氣特性
| Architecture | ARM Cortex-M0+ 32-bit RISC |
| Core | ARM Cortex-M0+ with single-cycle multiplier |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| ADC | 12-bit, up to 350 ksps, up to 14 channels |
| DAC | 10-bit, 1 MSPS |
| Timers/Counters | Two 16-bit TC modules for PWM/capture |
| Communication Interfaces | Up to 6 SERCOM (I2C/SPI/UART) plus USB 2.0 FS device |
| 封裝 | 48-pin QFN (7x7 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40 C to +85 C (industrial) |
| MSL 等級 | MSL3 (per JEDEC J-STD-020) |
| RoHS 狀態 | Compliant (Green) |
| 腳位數 | 48 |
ATSAMD20G16B-MU 腳位配置
| 腳位 1 | PA02 — General purpose IO / ADC AIN0 |
| 腳位 2 | PA03 — General purpose IO / ADC AIN1 / VREFA |
| 腳位 3 | PA04 — General purpose IO / ADC AIN2 / DAC VOUT |
| 腳位 4 | PA05 — General purpose IO / ADC AIN3 |
| 腳位 5 | PA06 — General purpose IO / ADC AIN4 |
| 腳位 6 | PA07 — General purpose IO / ADC AIN5 |
| 腳位 7 | VDDANA — Analog supply voltage |
| 腳位 8 | GND — Ground |
| 腳位 9 | PB08 — General purpose IO |
| 腳位 10 | PB09 — General purpose IO |
| 腳位 11 | PA08 — General purpose IO / NMI |
| 腳位 12 | PA09 — General purpose IO |
| 腳位 13 | PA10 — General purpose IO |
| 腳位 14 | PA11 — General purpose IO |
| 腳位 15 | VDDIO — Digital IO supply voltage |
| 腳位 16 | GND — Ground |
| 腳位 17 | PB10 — General purpose IO |
| 腳位 18 | PB11 — General purpose IO |
| 腳位 19 | PB12 — General purpose IO |
| 腳位 20 | PB13 — General purpose IO |
| 腳位 21 | PB14 — General purpose IO |
| 腳位 22 | PB15 — General purpose IO |
| 腳位 23 | PA12 — General purpose IO |
| 腳位 24 | PA13 — General purpose IO |
| 腳位 25 | PA14 — General purpose IO |
| 腳位 26 | PA15 — General purpose IO |
| 腳位 27 | PA16 — General purpose IO |
| 腳位 28 | PA17 — General purpose IO |
| 腳位 29 | PA18 — General purpose IO |
| 腳位 30 | PA19 — General purpose IO |
| 腳位 31 | PA20 — General purpose IO |
| 腳位 32 | PA21 — General purpose IO |
| 腳位 33 | PA22 — General purpose IO |
| 腳位 34 | PA23 — General purpose IO |
| 腳位 35 | PA24 — General purpose IO |
| 腳位 36 | PA25 — General purpose IO |
| 腳位 37 | GND — Ground |
| 腳位 38 | VDDIO — Digital IO supply voltage |
| 腳位 39 | PB16 — General purpose IO |
| 腳位 40 | PB17 — General purpose IO |
| 腳位 41 | PB18 — General purpose IO |
| 腳位 42 | PB19 — General purpose IO |
| 腳位 43 | PB20 — General purpose IO |
| 腳位 44 | PB21 — General purpose IO |
| 腳位 45 | PB22 — General purpose IO |
| 腳位 46 | PB23 — General purpose IO |
| 腳位 47 | PA27 — General purpose IO / SWDIO |
| 腳位 48 | PA30 — General purpose IO / SWCLK |
典型應用
ATSAMD20G16B-MU 適用於 6 應用s: Home Automation Controller, Smart Energy Metering Endpoint, USB Human Interface Device (HID), Industrial Sensor Node, Capacitive Touch Appliance Front Panel, Battery-Powered IoT Edge Device.
Home Automation Controller
The ATSAMD20G16B-MU fits home automation controllers by combining the Cortex-M0+ core's deterministic response for time-critical control loops with six SERCOM interfaces for simultaneous I2C sensor and SPI display communication. With 64 KB flash it accommodates complete Matter/Thread protocol stacks or proprietary RF subsystem drivers, while the 1.62-3.63V range allows direct battery-backed operation from a single CR123 cell. The integrated 12-bit ADC captures temperature, humidity, and ambient light sensor signals with 350 ksps throughput, sufficient for whole-home environmental monitoring at sub-second update rates. Compared with 8-bit MCU alternatives, the SAMD20 cuts interrupt latency by approximately 60 percent.
推薦
Smart Energy Metering Endpoint
The ATSAMD20G16B-MU is well-suited for smart metering endpoints where its 12-bit 350 ksps ADC samples current and voltage waveforms at adequate fidelity for energy calculation, while the Cortex-M0+ core performs RMS and power-factor computation in real time. The 64 KB flash accommodates DLMS/COSEM protocol stacks and tamper-detection firmware, and the integrated RTC with 32 kHz domain provides time-of-use tariff timing without external components. With sub-microampere sleep modes, battery-backed metering designs achieve 10+ year operational life on a single lithium primary cell.
推薦
USB Human Interface Device (HID)
The ATSAMD20G16B-MU's integrated full-speed USB 2.0 device controller with on-chip PHY supports USB HID class implementations such as custom keyboards, mice, touch surfaces, and industrial pointing devices without external transceivers. With 64 KB flash, designers can embed composite HID device stacks plus application-specific features such as RGB lighting control, while 8 KB SRAM handles multi-endpoint HID report buffering at 1000 Hz polling rates. The 48 MHz CPU provides adequate headroom for firmware-managed USB protocol handling with sub-microsecond interrupt response.
推薦
Industrial Sensor Node
The ATSAMD20G16B-MU fits industrial sensor nodes due to its industrial -40C to +85C operating range and the Cortex-M0+ core's deterministic interrupt latency for time-critical control applications. The 14-channel 12-bit ADC handles multi-sensor acquisition (temperature, pressure, strain gauge bridges) with on-chip PGA gain stages, while the six SERCOM interfaces support multiple IO-Link or RS-485 sensor bus masters simultaneously. The wide 1.62V to 3.63V supply range accommodates industrial 24V bus systems via onboard regulators with appropriate reverse-polarity protection.
推薦
Capacitive Touch Appliance Front Panel
The ATSAMD20G16B-MU implements PTC (Peripheral Touch Controller) capacitive touch sensing directly via internal hardware without requiring an external touch IC, making it ideal for appliance front panels with up to 12 touch buttons plus proximity sensing. With 64 KB flash, designers can implement waterproof touch algorithms, gesture recognition, and LED animation drivers, while the integrated SleepWalking peripheral event system enables the MCU to wake on touch with less than 1 microampere standby current. The 48-QFN footprint suits slim appliance chassis designs.
推薦
Battery-Powered IoT Edge Device
The ATSAMD20G16B-MU enables low-power IoT edge devices with sub-microampere standby current and Cortex-M0+ efficiency delivering approximately 9.4 CoreMark/mA. With 64 KB flash, the device runs application firmware plus secure bootloaders (typically under 30 KB) leaving headroom for OTA update staging buffers, while the Event System chains peripheral triggers without CPU intervention for sensor wake-and-measure workflows. Designers achieve multi-year battery life on CR2032 coin cells when using SleepWalking for duty-cycled measurement tasks.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMD20G16B-MU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMD20G16B-AUT | ATSAMD20G17B-MU | ATSAMD20E16B-MU | STM32L011K4T6 |
|---|---|---|---|---|---|
| Package | 48-QFN (7x7 mm) | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 32-LQFP - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics | NXP Semiconductors |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 32 MHz | 50 MHz |
| Flash Memory | 64 KB | 64 KB | 128 KB | 16 KB | 256 KB |
| SRAM | 8 KB | 8 KB | 16 KB | 2 KB | 36 KB |
| Operating Voltage | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.65V to 3.6V | 1.8V to 3.6V |
| USB Controller | Yes (USB 2.0 FS device) | Yes (USB 2.0 FS device) | Yes (USB 2.0 FS device) | No | Yes (USB 2.0 FS device) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
主要差異化特點
- Highest flash density at this price point with integrated USB (對比STM32L011K4T6)
- Larger SRAM than same-tier low-power MCUs (對比STM32L011K4T6)
- Same-family scaling without firmware changes (對比ATSAMD20G15B-MU)
設計說明
Estimated: at 48 MHz active CPU and 3.3 V supply, the typical active current is approximately 7 mA (about 145 uA/MHz). In standby sleep with full 8 KB SRAM retention at 3.3 V, the leakage is approximately 1.7 uA, dropping to roughly 0.7 uA in power-down mode with RTC running from a 32.768 kHz crystal. Place a 1 uF ceramic plus 100 nF decoupling pair within 5 mm of each VDDANA and VDDIO pin, and provide a low-impedance ground return through the exposed pad (EP) for thermal dissipation.
The 48-QFN exposed thermal pad must be soldered to a continuous ground plane on the top layer for both thermal dissipation and electrical grounding. Place all decoupling capacitors as close as possible to their respective supply pins with vias placed at the capacitor pads to minimize loop inductance. Keep the analog traces (VREFA, AIN inputs) physically separated from digital SERCOM traces by at least 3x trace width to reduce digital-to-analog crosstalk during high-speed ADC sampling.
Configure all unused GPIO pins as INPUT with internal pull-up enabled and interrupts disabled to prevent parasitic current paths in deep sleep states. Do not leave SWDIO/SWCLK pins floating - they must be left in their default state or external pull-ups must be added to prevent debugger misconnection on production boards. The NMI pin (PA08) requires careful routing since it cannot be disabled and can wake the device unintentionally if noise is present on that line.
合規資訊
RoHS Green compliance per Microchip product page. MSL3 moisture sensitivity per JEDEC J-STD-020. Not AEC-Q100 qualified for automotive - industrial grade only.