ATSAMD20J16B-MN - 48MHz Cortex-M0+ MCU, 64KB Flash, 64-VQFN | Microchip
MPN: ATSAMD20J16B-MN ✓ Hoạt độngATSAMD20J16B-MN Tóm tắt
ARM Cortex-M0+ is the most energy-efficient 32-bit ARM processor core, designed for low-cost, low-power microcontrollers that replace legacy 8-bit and 16-bit MCUs while adding thumb/Thumb-2 instruction efficiency and a single-cycle 32x32 hardware multiplier. An MCU (microcontroller unit) is a compact system-on-chip integrating CPU, memory (Flash/SRAM), and peripherals (ADC, timers, communication buses) on a single die; the Cortex-M0+ line is positioned below Cortex-M3/M4 and aimed at cost-sensitive, deterministic applications where every microwatt matters.
Key features of the ATSAMD20J16B-MN include 64KB in-system-programmable Flash, 8KB SRAM, a 12-bit 350 ksps SAR ADC with up to 20 channels, a 10-bit 350 ksps DAC, six SERCOM channels reconfigurable as UART/SPI/I2C, a 256-channel Peripheral Touch Controller (PTC), and full-speed USB 2.0 device support. The 48 MHz Cortex-M0+ core, Sleepwalking peripherals, and a low-power RTC running from a 32 kHz crystal enable <1 µA typical standby current with RTC retention, making the part ideal for battery-powered edge devices.
Architecturally, the device uses a 2-layer AHB-Lite bus matrix connecting CPU, Flash, SRAM, and peripherals with deterministic zero-wait-state access from SRAM. Peripherals are mapped through a unified SERCOM block (each instance is software-configured into UART/SPI/I2C/SMBus), and the Event System allows DMA-free peripheral-to-peripheral signalling - both features reduce CPU load and active-mode current.
Typical applications include home automation endpoints, smart metering, consumer wearables, industrial sensor nodes, USB HID peripherals, and cap-touch user interfaces. The wide 1.62V-3.63V supply range and integrated PTC simplify single-cell Li-ion and 2x AA designs. Designers should review the SAM D20 silicon errata (per the manufacturer datasheet family documents) prior to free-up for production, particularly regarding SERCOM and ADC behaviour.
This page synthesises distributor pricing, same-family drop-in alternatives such as ATSAMD20J18B-MN and ATSAMD20J15B-MN, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD20J16B-MN — 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 ATSAMD20J16B-MN (cùng hình factor và footprint) — khác nhau ở ADC, Package, DAC, SRAM, MSL Level.
ATSAMD20J15B-MN
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMD20J18B-MN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMD20G15A-MN
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20E16B-MN
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20J16B-MN
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAMD20J16B-MN Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ (32-bit) |
| Tần số xung maksimum | 48 MHz |
| Flash Memory | 64 KB |
| SRAM | 8 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Khoảng nhiệt độ hoạt động | -40 C to +105 C |
| ADC | 12-bit SAR, up to 20 channels, 350 ksps |
| DAC | 10-bit, 350 ksps |
| Communication Interfaces | 6x SERCOM (UART/SPI/I2C), 1x I2S, full-speed USB 2.0 Device |
| Timers/Counters | TC (8-bit/16-bit pair), TCC (16-bit), RTC, WDT |
| Peripheral Touch Controller (PTC) | 256 channels (mutual- and self-capacitance) |
| I/O Pins | Up to 52 GPIO |
| Hộp | 64-pin VQFN (MN), 9x9 mm with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| CoreMark/MHz | 2.46 |
Cấu hình chân ATSAMD20J16B-MN
| Chân 1 | PA00 — GPIO / SERCOM1 PAD0 / TCC2 WO0 |
| Chân 2 | PA01 — GPIO / SERCOM1 PAD1 / TCC2 WO1 |
| Chân 3 | PA02 — GPIO / AIN0 / SERCOM0 PAD0 |
| Chân 4 | PA03 — GPIO / AIN1 / DAC VOUT |
| Chân 5 | PA04 — GPIO / AIN2 / SERCOM0 PAD2 |
| Chân 6 | PA05 — GPIO / AIN3 / SERCOM0 PAD3 |
| Chân 7 | PA06 — GPIO / AIN4 / SERCOM0 PAD0 |
| Chân 8 | PA07 — GPIO / AIN5 / SERCOM0 PAD1 |
| Chân 9 | VDDIO — Digital supply voltage |
| Chân 10 | VSSIO — Digital ground |
| Chân 11 | PA08 — GPIO / AIN6 / SERCOM2 PAD0 / I2S SCK |
| Chân 12 | PA09 — GPIO / AIN7 / SERCOM2 PAD1 / I2S MCK |
| Chân 13 | PA10 — GPIO / SERCOM2 PAD2 / TCC0 WO0 |
| Chân 14 | PA11 — GPIO / SERCOM2 PAD3 / TCC0 WO1 |
| Chân 15 | PA12 — GPIO / SERCOM4 PAD0 / TCC1 WO2 |
| Chân 16 | PA13 — GPIO / SERCOM4 PAD1 / TCC1 WO3 |
| Chân 17 | PA14 — GPIO / SERCOM4 PAD2 / TCC0 WO2 |
| Chân 18 | PA15 — GPIO / SERCOM4 PAD3 / TCC0 WO3 |
| Chân 19 | PA16 — GPIO / SERCOM1 PAD0 / TCC2 WO0 |
| Chân 20 | PA17 — GPIO / SERCOM1 PAD1 / TCC2 WO1 |
| Chân 21 | PA18 — GPIO / SERCOM1 PAD2 / TC3 WO0 |
| Chân 22 | PA19 — GPIO / SERCOM1 PAD3 / TC3 WO1 |
| Chân 23 | PA20 — GPIO / SERCOM3 PAD0 / TC4 WO0 |
| Chân 24 | PA21 — GPIO / SERCOM3 PAD1 / TC4 WO1 |
| Chân 25 | PA22 — GPIO / SERCOM3 PAD2 / TC5 WO0 |
| Chân 26 | PA23 — GPIO / SERCOM3 PAD3 / TC5 WO1 |
| Chân 27 | PA24 — GPIO / SERCOM5 PAD0 / USB D- |
| Chân 28 | PA25 — GPIO / SERCOM5 PAD1 / USB D+ |
| Chân 29 | PA26 — GPIO / SERCOM5 PAD2 |
| Chân 30 | PA27 — GPIO / SERCOM5 PAD3 |
| Chân 31 | PA28 — GPIO / SERCOM5 PAD0 / TC6 WO0 |
| Chân 32 | PA29 — GPIO / SERCOM5 PAD1 / TC6 WO1 |
| Chân 33 | PA30 — GPIO / SERCOM1 PAD2 / TCC1 WO0 |
| Chân 34 | PA31 — GPIO / SERCOM1 PAD3 / TCC1 WO1 |
| Chân 35 | VDDIO — Digital supply voltage |
| Chân 36 | VSSIO — Digital ground |
| Chân 37 | PB00 — GPIO / AIN8 / SERCOM5 PAD2 |
| Chân 38 | PB01 — GPIO / AIN9 / SERCOM5 PAD3 |
| Chân 39 | PB02 — GPIO / AIN10 / SERCOM5 PAD0 |
| Chân 40 | PB03 — GPIO / AIN11 / SERCOM5 PAD1 |
| Chân 41 | PB04 — GPIO / AIN12 / SERCOM4 PAD0 |
| Chân 42 | PB05 — GPIO / AIN13 / SERCOM4 PAD1 |
| Chân 43 | PB06 — GPIO / AIN14 / SERCOM4 PAD2 |
| Chân 44 | PB07 — GPIO / AIN15 / SERCOM4 PAD3 |
| Chân 45 | PB08 — GPIO / SERCOM4 PAD0 / TC4 WO0 |
| Chân 46 | PB09 — GPIO / SERCOM4 PAD1 / TC4 WO1 |
| Chân 47 | PB10 — GPIO / SERCOM4 PAD2 / TC5 WO0 |
| Chân 48 | PB11 — GPIO / SERCOM4 PAD3 / TC5 WO1 |
| Chân 49 | PB12 — GPIO / SERCOM4 PAD0 / TC0 WO0 |
| Chân 50 | PB13 — GPIO / SERCOM4 PAD1 / TC0 WO1 |
| Chân 51 | PB14 — GPIO / SERCOM4 PAD2 / TC1 WO0 |
| Chân 52 | PB15 — GPIO / SERCOM4 PAD3 / TC1 WO1 |
| Chân 53 | PB16 — GPIO / SERCOM5 PAD0 / TCC0 WO4 |
| Chân 54 | PB17 — GPIO / SERCOM5 PAD1 / TCC0 WO5 |
| Chân 55 | PB18 — GPIO / SERCOM5 PAD2 / TCC0 WO6 |
| Chân 56 | PB19 — GPIO / SERCOM5 PAD3 / TCC0 WO7 |
| Chân 57 | PB20 — GPIO / SERCOM3 PAD0 / TC7 WO0 |
| Chân 58 | PB21 — GPIO / SERCOM3 PAD1 / TC7 WO1 |
| Chân 59 | VSW — DC-DC switching node |
| Chân 60 | VDDANA — Analog supply (1.62-3.63 V) |
| Chân 61 | VSSA — Analog ground |
| Chân 62 | VDDIO — Digital supply voltage |
| Chân 63 | VSSIO — Digital ground |
| Chân 64 | GND — Exposed thermal pad - tie to VSS |
Ứng dụng tiêu biểu
ATSAMD20J16B-MN phù hợp cho 6 Áp dụngs: Home Automation Endpoints, Smart Metering & Energy Measurement, Consumer Wearables, Industrial Sensor Nodes, USB HID Peripherals, Cap-Touch User Interfaces.
Home Automation Endpoints
The ATSAMD20J16B-MN's 48 MHz Cortex-M0+ core, 64 KB Flash and 8 KB SRAM comfortably run Z-Wave, Zigbee or Matter bridge stacks for cost-sensitive home-automation endpoints. The 6 reconfigurable SERCOM blocks map UART/SPI/I2C peripherals required for sensor hubs, level translators, and wireless radio transceivers. The 12-bit 350 ksps ADC delivers 20 channels of low-rate sensor acquisition - sufficient for temperature, humidity and PIR occupancy inputs. With 1.62V to 3.63V supply and SleepWalking peripherals, the part draws microamperes during quiescent monitoring, enabling multi-year battery life on 2x AA cells.
Được đề xuất
Smart Metering & Energy Measurement
In single-phase electricity, water, or gas meters the ATSAMD20J16B-MN integrates 12-bit ADC sampling for load-current input, 10-bit DAC for analogue loops, and RTC with calendar mode for time-of-use billing. The Cortex-M0+ core reaches 2.46 CoreMark/MHz - sufficient for DLMS/COSEM or ANSI C12.18 stack execution within the 64 KB Flash budget. The 1.62V-3.63V range lets the meter share a 3.6V battery-backed supercapacitor supply with the radio module, simplifying PMIC design. Sleep modes reduce quiescent current below 5 µA for compliance with battery-free metrology nodes.
Được đề xuất
Consumer Wearables
Wearable bands and fitness trackers prioritise long battery life over raw MHz, which is why the ATSAMD20J16B-MN is a strong choice: the SleepWalking Event System triggers the ADC/PTC from sensor thresholds without waking the CPU, holding deep-sleep current below 1 µA. The 256-channel Peripheral Touch Controller (PTC) enables mutual-capacitance swipe and tap gestures directly on the wearable enclosure, reducing external switch count. USB 2.0 full-speed device support simplifies firmware upgrades over the cradle connector without an external PHY. The 64-VQFN MN fits beneath typical 30 mm x 30 mm wearable PCBs.
Được đề xuất
Industrial Sensor Nodes
The -40 C to +105 C operating range makes the ATSAMD20J16B-MN attractive for industrial 4-20 mA loop nodes and condition-monitoring endpoints. SPI-driven sensors (accelerometers, pressure) reach via the SERCOM reconfigurable blocks, while the 12-bit 350 ksps SAR ADC can digitise vibration or strain signals at full bandwidth. With the Event System routing ADC-completed pulses to the DMA-less SERCOM FIFO, the Cortex-M0+ core stays asleep while sampling 10 kHz vibration streams. Industrial protocols (IO-Link, Modbus RTU) fit in the 64 KB Flash, and the small 9x9 mm QFN eases PCB integration into IP65 enclosures.
Được đề xuất
USB HID Peripherals
Built-in USB 2.0 full-speed device with on-chip pull-ups and voltage regulator support allows the ATSAMD20J16B-MN to act as a HID class device with minimal external components - ideal for keyboards, mice, gaming controllers, and custom HMIs. The 48 MHz core handles USB polling and HID report generation while spare SERCOM channels drive RGB LED arrays via WS2812-style bit-banging at 800 kHz. The 64-pin VQFN provides ample GPIO for matrix-scanned key arrays, rotary encoders, and analog thumbsticks. Firmware is updatable over USB using the SAM-BA bootloader stored in protected Flash.
Được đề xuất
Cap-Touch User Interfaces
The integrated 256-channel Peripheral Touch Controller (PTC) supports both mutual- and self-capacitance sensing - enabling flush, water-tolerant touch buttons, sliders, and wheels under glass or acrylic. The Event System wakes the Cortex-M0+ only on a qualified touch, holding deep-sleep current below 1 µA between touches. The 64 KB Flash is sufficient to run Microchip's 2D Touch Library along with a lightweight GUI / LED feedback loop, while the 12-bit SAR ADC digitises an analog front-end (proximity, force) in parallel. PTC acquisition combined with a low-noise LDO on the analog rail produces stable mTouch performance across industrial temperature ranges.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD20J16B-MN — 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 | ATSAMD20J15B-MN | ATSAMD20J18B-MN | ATSAMD20G15A-MN |
|---|---|---|---|---|
| Package | 64-VQFN (MN) 9x9 mm | 64-VQFN (MN) 9x9 mm - identical | 64-VQFN (MN) 9x9 mm - identical | 64-VQFN (MN) 9x9 mm - identical |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz | Cortex-M0+ @ 48 MHz |
| Flash | 64 KB | 32 KB (-50%) | 256 KB (+300%) | 32 KB (-50%) |
| SRAM | 8 KB | 4 KB (-50%) | 32 KB (+300%) | 4 KB (-50%) |
| USB Device | Yes (full-speed) | Yes (full-speed) | Yes (full-speed) | No (-) |
| SERCOM Channels | 6 | 6 | 6 | up to 6 (fewer GPIO-bound) |
| 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 |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
Bảo phân biệt quan trọng
- Drop-in Flash ladder in the same 64-VQFN MN footprint (vsATSAMD20J15B-MN / ATSAMD20J18B-MN)
- Full-speed USB 2.0 device on-chip with no external PHY (vsATSAMD20G15A-MN)
- 256-channel PTC for low-power capacitive touch (vsSAM C20/SAM D21)
- Pin-compatible Cortex-M0+ upgrade path within SAM D20 family (vsGeneric Cortex-M0+ competitors)
Ghi chú thiết kế
When the USB peripheral is enabled, a 3.3V regulator capable of sourcing 100 mA is required on the VDDIO rail, since the internal 3.3V LDO typically draws load from VBUS and VDDIO simultaneously. Use a low-Iq LDO such as MCP1700 to extend battery life when USB is disabled. Decouple each VDDIO pin with 100 nF ceramic; add a 4.7 µF bulk capacitor near the analog VDDANA pin for SAR ADC reference stability.
Estimated: At 48 MHz execution from internal Flash and all GPIO toggling, the SAM D20 draws approximately 7-9 mA active. Power dissipation under continuous full-speed execution is roughly P = VDD * IDD ≈ 3.3V x 8 mA = 26 mW. With theta_JA of approximately 31 C/W on a 4-layer 2 oz copper PCB, junction temperature rise above 25 C ambient is ~0.8 C. The exposed pad (pin 64) MUST be soldered to the ground plane to meet this thermal path; failing to solder the e-pad can double the junction temperature during continuous full-load operation.
Route the SERCOM lines in adjacent pairs (e.g., PA08/PA09) so that 3.3V SPI or I2C signals share a 50 ohm characteristic impedance path on the top layer. Place the 32 kHz crystal (XIN32/XOUT32) within 5 mm of the dedicated pins (PB00/PB01) with trace guard via fencing, since crystal-related leakage paths are a frequent cause of RTC drift. Keep the AREF pin decoupling within 3 mm and analog traces away from the SERCOM and PWM switching lines to avoid coupling into the SAR ADC.
Do not enable the USB peripheral before the regulator settles - the VDDIO rail must be at least 3.0V before asserting VBUS sensing. Watch out for the ADC reference buffer on-chip: leaving REFCTRL.REFSEL set to 'INTREF' on first power-up can cause a 1-mA quiescent step. Finally, the brown-out detector (BOD) at 1.55V minimum must be enabled in NVM, otherwise writes to Flash during a brown-out condition can corrupt the underlying user row.
Thông tin tuân thủ
RoHS/REACH compliance per the Microchip environmental information page. AEC-Q100 is not_applicable for the standard 'B-MN' part (look for automotive-grade SAM D20 with 'A' or 'E' suffix). Lead-free and halogen-free per the BOM material declaration. Conflict-minerals statement published by Microchip annually.
