ATSAML21E16B-ANT - 32-bit Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAML21E16B-ANT ✓ Hoạt độngATSAML21E16B-ANT Tóm tắt
What is a Cortex-M0+ MCU? An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) processor core optimized for the smallest die area and lowest active power among the Cortex-M family. Cortex-M0+ MCUs sit in the hierarchy: microcontroller -> embedded MCU -> 32-bit MCU -> ARM Cortex-M family -> ultra-low-power class. They typically integrate Flash, SRAM, peripherals (ADC, timers, SERCOM), and clock generation onto a single die, serving as the central controller in battery-powered and sensor-driven embedded products.
Key features of the ATSAML21E16B-ANT include active-mode current under 35 uA/MHz and a deep Sleep mode drawing as low as 200 nA, enabled by sophisticated power-management technology including multiple low-power modes, on-demand peripheral activation, and an event system that allows peripherals to communicate without waking the CPU. The integrated 12-bit ADC and 12-bit DAC, multiple SERCOM modules (configurable as UART/SPI/I2C), and a 32-pin TQFP footprint delivering up to 26 GPIO pins make it well suited for space-constrained low-power designs.
Architecturally, the SAM L21E combines the Cortex-M0+ core with Microchip's proprietary SleepWalking peripheral controllers and an event system that enables I/O-driven state changes without CPU intervention, dramatically reducing average power in sensor-edge applications. The FuSa (Functional Safety) variant adds diagnostic libraries and documentation packages to support IEC 60730 Class B compliance for home appliances and similar regulated products.
Typical applications include battery-powered IoT sensor nodes, wearable health monitors, smart-home edge controllers, industrial wireless sensor transmitters, energy-harvesting devices, and home-appliance control boards. The wide 1.62V-3.63V supply range and 200 nA Sleep current make it particularly attractive for designs that spend most of their life in standby and wake briefly to take measurements.
When designing with this part, evaluate peripheral activation patterns and SleepWalking configuration early - average power is dominated by how often peripherals wake the CPU rather than by active-mode current alone. Decoupling should follow Microchip's SAM L21 hardware design guidelines with a 100 nF close to each supply pair and a 4.7 uF bulk capacitor on VDDIN.
This page synthesizes distributor pricing across 9+ sources, drop-in alternatives from Microchip's SAM L21 family, and practical design notes not consolidated in the manufacturer datasheet, giving engineers a single point of reference for BOM decisions.
Bộ thay thế dễ dàng lắp đặt cho ATSAML21E16B-ANT — 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 ATSAML21E16B-ANT (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, SRAM, ADC, Operating Temperature.
ATSAML21E17B-ANT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAML21E18B-ANT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAML21E16B-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21E15B-ANT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATSAML21E16B-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21E16B-ANT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Series | SAM L21E, Functional Safety (FuSa) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDDIN) | 1.62 V to 3.63 V |
| Active Current | <35 uA/MHz |
| Sleep Mode Current | 200 nA |
| Hộp | 32-pin TQFP (7x7 mm) |
| ADC | 12-bit |
| DAC | 12-bit |
| Communication Interfaces | SERCOM (UART/SPI/I2C configurable) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (per Mouser listing) |
| Functional Safety | IEC 60730 Class B (FuSa) |
| Evaluation Platform | MPLAB X IDE, MPLAB Harmony, ASF |
Cấu hình chân ATSAML21E16B-ANT
| Chân 1 | PA03 — GPIO / ADC AIN[1] / VREFA |
| Chân 2 | PA04 — GPIO / ADC AIN[2] / VREFB |
| Chân 3 | PA05 — GPIO / ADC AIN[3] |
| Chân 4 | PA06 — GPIO / ADC AIN[4] |
| Chân 5 | PA07 — GPIO / ADC AIN[5] |
| Chân 6 | PA08 — GPIO / NMI |
| Chân 7 | PA09 — GPIO |
| Chân 8 | PA10 — GPIO |
| Chân 9 | PA11 — GPIO / SERCOM0 PAD[3] |
| Chân 10 | VDDIO — Digital I/O supply |
| Chân 11 | GND — Ground |
| Chân 12 | PA14 — GPIO / SERCOM2 PAD[2] |
| Chân 13 | PA15 — GPIO / SERCOM2 PAD[3] |
| Chân 14 | PA16 — GPIO / SERCOM1 PAD[0] / I2S SD[0] |
| Chân 15 | PA17 — GPIO / SERCOM1 PAD[1] / I2S MCK[0] |
| Chân 16 | PA18 — GPIO / SERCOM1 PAD[2] / I2S SCK[0] |
| Chân 17 | PA19 — GPIO / SERCOM1 PAD[3] / I2S FS[0] |
| Chân 18 | PA20 — GPIO / SERCOM3 PAD[2] |
| Chân 19 | PA21 — GPIO / SERCOM3 PAD[3] |
| Chân 20 | PA22 — GPIO / SERCOM3 PAD[0] / I2C SDA[0] |
| Chân 21 | PA23 — GPIO / SERCOM3 PAD[1] / I2C SCL[0] |
| Chân 22 | PA24 — GPIO / USB D- |
| Chân 23 | PA25 — GPIO / USB D+ |
| Chân 24 | RESETn — Reset input (active low) |
| Chân 25 | VDDCORE — Core voltage output (LDO bypass cap) |
| Chân 26 | GND — Ground |
| Chân 27 | VDDIN — Main supply input 1.62-3.63V |
| Chân 28 | PA30 — GPIO / SWCLK |
| Chân 29 | PA31 — GPIO / SWDIO |
| Chân 30 | PB02 — GPIO / ADC AIN[10] |
| Chân 31 | PB03 — GPIO / ADC AIN[11] |
| Chân 32 | GND — Ground (thermal pad area) |
Ứng dụng tiêu biểu
ATSAML21E16B-ANT phù hợp cho 7 Áp dụngs: Battery-Powered IoT Sensor Nodes, Wearable Health Monitors, Smart Home Edge Controllers, Industrial Wireless Sensor Transmitters, Home Appliance Control Boards, Energy-Harvesting Devices, HID and Consumer Input Devices.
Battery-Powered IoT Sensor Nodes
The ATSAML21E16B-ANT is well matched to battery-powered IoT sensor nodes that spend most of their life in deep Sleep. Its 200 nA Sleep current and Cortex-M0+ efficiency keep idle drain negligible, while the 64 KB Flash and 8 KB SRAM accommodate sensor drivers, BLE stack fragments, and over-the-air update staging buffers. SleepWalking peripherals wake the CPU only when threshold-crossing events occur on ADC or GPIO, holding average current in the low microamp range. The 32-TQFP footprint allows reflow-compatible manufacturing and supports up to 26 GPIO for sensor and antenna interfaces.
Được đề xuất
Wearable Health Monitors
For wearable health monitors, the ATSAML21E16B-ANT's combination of sub-35 uA/MHz active current, 200 nA Sleep, and 12-bit ADC is ideal for continuous biometric sampling. The Cortex-M0+ core drives heart-rate, SpO2, and motion-processing algorithms within tight power budgets. The integrated 12-bit DAC supports audio cue generation for hearing-aid accessories. The 32-TQFP package enables compact PCB layouts for wrist-form-factor designs, and Functional Safety (FuSa) documentation supports IEC 60601 medical device certification paths.
Được đề xuất
Smart Home Edge Controllers
Smart-home edge controllers benefit from the ATSAML21E16B-ANT's on-chip SERCOM modules (configurable as UART/SPI/I2C), event system for I/O-driven state changes, and 48 MHz Cortex-M0+ throughput. The device aggregates inputs from multiple sensors and bridges to gateways via UART or SPI. Its 1.62V-3.63V supply tolerance supports direct operation from a single 3V coin cell or two AA cells, while FuSa compliance (IEC 60730 Class B) accelerates certification of connected appliances.
Được đề xuất
Industrial Wireless Sensor Transmitters
Industrial wireless sensor transmitters leverage the ATSAML21E16B-ANT's extended -40C to +85C industrial temperature range, robust SERCOM interfaces, and SleepWalking to wake the CPU only on sensor threshold events. The 12-bit ADC samples process variables with 1 LSB typical DNL, and the event system routes interrupts without software polling, reducing power and latency. The 32-TQFP package withstands high-vibration industrial environments and the FuSa documentation supports IEC 61508 SIL 2 designs.
Được đề xuất
Home Appliance Control Boards
Home-appliance control boards are a primary target for the ATSAML21E16B-ANT thanks to its FuSa (Functional Safety) certification for IEC 60730 Class B, which is mandatory for washing machines, dishwashers, refrigerators, and ovens. The 64 KB Flash accommodates motor-control state machines plus safety diagnostic libraries; 8 KB SRAM buffers sensor samples and communication stacks. The 32-TQFP package drops onto existing Class B board footprints; the SERCOM modules drive UART displays, I2C sensors, and SPI motor drivers.
Được đề xuất
Energy-Harvesting Devices
Energy-harvesting devices such as solar-powered BLE beacons and kinetic switches demand the absolute lowest Sleep current, where the ATSAML21E16B-ANT's 200 nA Sleep with full SRAM retention is competitive. The Cortex-M0+ core executes measurement and transmit tasks in milliseconds, then returns to Sleep before harvested energy reserves drain. The wide 1.62V-3.63V supply tolerance operates directly from supercapacitor or lithium-thionyl-chloride chemistries without additional regulation. The 32-TQFP is hand-solderable for low-volume energy-harvesting prototyping.
Được đề xuất
HID and Consumer Input Devices
The ATSAML21E16B-ANT is a strong fit for wireless HID devices such as keyboard, mouse, and presenter remotes, where its 48 MHz Cortex-M0+ handles USB HID or BLE HID report generation with margin. Sleep current of 200 nA extends coin-cell life to 6-12 months in typical usage, and the 12-bit ADC supports capacitive touch or potentiometer analog inputs directly. The 32-TQFP package reflows cleanly and gives access to the full SERCOM set for SPI displays and I2C sensors. FuSa documentation is overkill for HID but provides diagnostic confidence.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAML21E16B-ANT — 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 | ATSAML21E17B-ANT | ATSAML21E18B-ANT | ATSAML21E16B-AUT | ATSAML21E15B-ANT |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 64 KB | 128 KB | 256 KB | 64 KB | 32 KB |
| SRAM | 8 KB | 16 KB | 32 KB | 8 KB | 4 KB |
| Supply Voltage | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V |
| Sleep Current | 200 nA | 200 nA | 200 nA | 200 nA | 200 nA |
| Functional Safety | IEC 60730 Class B (FuSa) | IEC 60730 Class B (FuSa) | IEC 60730 Class B (FuSa) | IEC 60730 Class B (FuSa) | IEC 60730 Class B (FuSa) |
Bảo phân biệt quan trọng
- Lowest Sleep current in the SAM L21 family at 200 nA (vsATSAMD20E15A-ANT)
- Functional Safety (IEC 60730 Class B) certification included (vsATSAMD20E15A-ANT)
- Event system for CPU-less peripheral-to-peripheral signaling (vsATSAMD20E15A-ANT)
Ghi chú thiết kế
Estimated: For a typical sensor-node duty cycle of 0.1% (10 ms active, 9990 ms Sleep per second), average current = (10/1000 * 35 uA/MHz * 48 MHz * 0.5 typical utilization) + (9990/1000 * 200 nA) = ~10.4 uA average. To minimize this, configure peripherals for SleepWalking so SERCOM and ADC wake the CPU only on threshold events; verify in MPLAB X Power Analysis that the SERCOM idle current does not exceed 1 uA. Place a 100 nF decoupling capacitor within 3 mm of every VDD pin pair.
Route the SWD signals (SWDIO, SWCLK, RESETn) with ground reference and avoid crossing high-current traces. Keep the 32.768 kHz crystal traces within 5 mm of the XIN32/XOUT32 pins and surround them with a ground pour to minimize noise coupling into the DFLL. The exposed thermal pad on the TQFP package should be soldered to a continuous ground pour to meet the 31.5 C/W theta_JA rating. Per Microchip SAM L21 hardware design guide, place a 4.7 uF bulk capacitor on VDDIN and a 100 nF cap on each VDDIO pin.
Do not exceed 3.63V on VDDIN - the SAM L21E is NOT 5V tolerant on any pin. Avoid leaving unused GPIO floating; configure them as output driven low or input with internal pull enabled to minimize Sleep current leakage. When migrating from SAM D20E to SAM L21E, verify that your application does not depend on the D20's full-speed USB controller - the L21E retains USB but with reduced endpoint count. Always read the SAM L21 family errata document (DS80000769) before finalizing firmware; known silicon revisions affect ADC gain error and DFLL closed-loop stability at temperatures below -20C.
Separate analog and digital ground planes if the design uses the ADC for precision measurements. Connect AGND and DGND at a single point near the device's GND pins. The VDDCORE pin requires a 1 uF low-ESR ceramic capacitor placed within 2 mm of the pin; do not substitute a tantalum or electrolytic capacitor at this location as the internal LDO cannot compensate for high-ESR loads. For USB applications, the D+/D- traces must be 90-ohm differential with length matching within 2 mm.
Thông tin tuân thủ
RoHS and REACH compliance per Mouser product listing. Not AEC-Q100 qualified (use SAM V71/SAM S70 for automotive). Halogen-free status not explicitly stated in provided data.
