ATSAMD21G16B-AFT - 48MHz Cortex-M0+ 64KB Flash MCU | Microchip
N.º da peça: ATSAMD21G16B-AFT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.95 | $3,95 |
| 10 | $3.55 | $35,50 |
| 100 | $3.12 | $312,00 |
| 500 | $2.78 | $1.390,00 |
| 1.000 | $2.45 | $2.450,00 |
ATSAMD21G16B-AFT Visão geral
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), working memory (RAM), and configurable peripherals. The ARM Cortex-M0+ is the most energy-efficient core in the ARM Cortex-M family, optimized for low-power embedded applications where deterministic real-time response, small code footprint, and minimal active current are essential. The SAM D21 series uses a Harvard bus architecture with separate code and data buses, enabling simultaneous fetch and memory access for higher throughput at lower clock rates.
Key differentiating features include 6 SERCOM modules (each independently assignable as UART, SPI, or I2C), a 12-bit 350ksps ADC with up to 14 analog channels, a 10-bit 350ksys DAC, and a USB 2.0 Full-Speed device interface with integrated PHY. The device supports Sleepwalking peripherals and Sleep Modes (Idle, Standby, Backup, and Off), with wake-up times under 5 us from Standby, making it suitable for battery-powered sensor nodes and always-on IoT edge devices.
Typical applications include IoT sensor nodes, wearable fitness bands, consumer appliance control panels, USB human-interface devices (HIDs), and low-cost industrial control modules. The SAM D21 ecosystem is supported by Microchip Studio 7, Atmel START, and the MPLAB X IDE toolchain, with a rich library of software framework examples and middleware (ASF v3 / Microchip CodeVision / Harmony 3) that accelerate firmware development. The 48-TQFP package provides easy hand-soldering and breadboard-friendly 0.5 mm pitch pads, which is convenient for prototype work.
This page synthesizes distributor pricing, drop-in SAMD21 alternatives, and practical design notes not found on the manufacturer product page, with cross-brand cross-references sourced from live distributor data. Pricing reflects current market rates as of 2026-09-21 and may vary by quantity break and supplier allocation.
Alternativas drop-in para ATSAMD21G16B-AFT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATSAMD21G16B-AFT (mesmo formato e footprint) — diferindo em Package, DAC, USB, ADC, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAMD21G16B-MUT
✅ Drop-In✓ Em estoque
$2.05 / unidade
Ver ficha técnica →ATSAMD21G15B-AF
✅ Drop-In✓ Em estoque
$1.78 / unidade
Ver ficha técnica →ATSAMD21G15B-AU
✅ Drop-In✓ Em estoque
$1.65 / unidade
Ver ficha técnica →ATSAMD21G15B-MUT
✅ Drop-In✓ Em estoque
$1.78 / unidade
Ver ficha técnica →ATSAMD21E17A-MFT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.55 / unidade
Ver ficha técnica →ATSAMD21E17A-AF
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.34 / unidade
Ver ficha técnica →ATSAMD21G16B-AFT Classificações máximas e características elétricas
| Core | ARM Cortex-M0+ (32-bit) |
| Series | SAM D21 (SAM D21G family) |
| Frequência máxima de clock | 48 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDDIN) | 1.62 V to 3.63 V |
| Temperatura de operação | -40 C to +125 C (industrial) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit, 350 ksps |
| SERCOM Modules | 6 (configurable UART/SPI/I2C) |
| USB | USB 2.0 Full-Speed Device with on-chip PHY |
| Encapsulamento | 48-pin TQFP, 7x7 mm, 0.5 mm pitch |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant (Green / Pb-free) |
Guia de Configuração de Pinos do ATSAMD21G16B-AFT 48-pin tqfp, 7x7 mm, 0.5 mm pitch
Configuração de pinos para ATSAMD21G16B-AFT (pacote 48-pin tqfp, 7x7 mm, 0.5 mm pitch). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATSAMD21G16B-AFT.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATSAMD21G16B-AFT é adequado para 6 aplicaçãos: IoT Sensor Node, Wearable Fitness Band, USB HID Device, Consumer Appliance Control Panel, Industrial Sensor Module, Battery Charger Controller.
IoT Sensor Node
The ATSAMD21G16B-AFT fits battery-operated IoT sensor nodes due to its Cortex-M0+ efficiency, multiple SERCOM channels for I2C/SPI sensor interfaces, 12-bit ADC for analog sensor reading, and ultra-low Sleep current under 5 uA. The 64 KB Flash accommodates sensor-fusion algorithms, BLE/LoRa soft-stack integration, and OTA update logic. The six SERCOM channels allow simultaneous sensor, display, and radio bus connectivity without I/O expansion. Compared to older 8-bit AVR MCUs, the SAMD21 delivers 30-50x more DMIPS at similar or lower active power.
Recomendado
Wearable Fitness Band
For wearable fitness bands, the ATSAMD21G16B-AFT delivers the right balance of low power, integrated peripherals, and small footprint. The 48 MHz Cortex-M0+ core processes step counting, accelerometer fusion, and heart-rate algorithms well within the 64 KB Flash budget. The 12-bit ADC handles bio-impedance measurement for heart rate, and the 10-bit DAC drives LED pulse oximetry. Sleep current under 5 uA in Standby enables 7-day battery life on a 100 mAh coin cell.
Recomendado
USB HID Device
The ATSAMD21G16B-AFT integrates a USB 2.0 Full-Speed device controller and on-chip transceiver, making it a natural choice for USB HID devices like keyboards, mice, and game controllers. The 64 KB Flash accommodates HID descriptors and composite device stacks; 8 KB SRAM handles HID report buffers and CDC streams. Microchip's ASF/Harmony 3 USB stack provides ready examples for HID, CDC, MSD, and vendor-class firmware, reducing development time from weeks to days.
Recomendado
Consumer Appliance Control Panel
For consumer appliance control panels (coffee machines, washing machines, induction cookers), the ATSAMD21G16B-AFT provides industrial -40C to +125C temperature range and reliable touch-button and LED-driving capability. The 12-bit ADC reads temperature, motor current, and water-level sensors; multiple SERCOM channels drive LED displays, I2C sensors, and SPI flash. The 48-pin TQFP 7x7 mm is breadboard-friendly for prototype iteration and supports hand-soldering rework during development.
Recomendado
Industrial Sensor Module
The ATSAMD21G16B-AFT is well-suited to industrial sensor modules requiring industrial -40C to +125C operating range, 4-20 mA loop interfaces, and analog sensor reading. The 12-bit ADC with hardware averaging and oversampling delivers clean readings from RTDs, thermocouples, and bridge sensors. Multiple SERCOM channels support RS-485, Modbus, and IO-Link communication. The 64 KB Flash and 8 KB SRAM accommodate sensor linearization, calibration tables, and industry-standard protocol stacks.
Recomendado
Battery Charger Controller
For battery charger controllers in consumer and industrial products, the ATSAMD21G16B-AFT provides 12-bit ADC for voltage/current sensing, PWM timers for synchronous buck control, and SERCOM for SMBus/PMBus communication. The 48-pin TQFP exposes enough GPIO for charger status LEDs, enable signals, and safety interlocks. Sleep modes below 5 uA enable idle-mode standby without draining the battery when the device is idle or unplugged.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAMD21G16B-AFT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATSAMD21G16B-MUT | ATSAMD21G15B-AF | ATSAMD21G15B-AU | ATSAMD21G15B-MUT | ATSAMD21E17A-MFT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-QFN (MUT) - same pinout | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same | 48-QFN (MUT) - same pinout | 48-QFN (MFT) - same pinout |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Flash Memory | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 32 KB (-50%) | 128 KB (+100%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB (+100%) |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Supply 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 |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | -40 C to +125 C |
| USB 2.0 FS | Yes (on-chip PHY) | Yes (on-chip PHY) | Yes (on-chip PHY) | Yes (on-chip PHY) | Yes (on-chip PHY) | Yes (on-chip PHY) |
Principais diferenciais
- 64KB Flash in 48-pin TQFP at industrial -40C to +125C (vs ATSAMD21G15B-AF)
- On-chip USB 2.0 Full-Speed PHY (vs ATSAMD20G18A-AU)
- Six SERCOM channels (vs ATSAMD21E16B-AU)
Notas de projeto
Decouple VDDIN with a 100 nF X7R ceramic capacitor placed within 5 mm of the pin, plus a bulk 4.7 uF to 10 uF low-ESR capacitor on the same supply rail. The SAM D21 internal voltage regulator requires both capacitors for stable PLL operation; omitting the bulk capacitor causes intermittent startup failures or dropped USB packets at cold temperatures. For battery applications, the AT-SOAD level standby current is reached only after disabling all peripheral clocks and the BOD, per Microchip SAM D21 datasheet section 'Low-Power Modes'.
Route the USB DP/DM traces as a 90-ohm differential pair with maximum 3 mm length matching on a continuous ground reference plane. Place the USB series ferrite and ESD protection diode (USBLC6-2SC6 or equivalent) within 10 mm of the USB connector. The exposed pad (TQFP-48 has no exposed pad, but QFN-48 does) on the QFN variant must be soldered to a thermal pad with 9 thermal vias to the ground plane for 1 W dissipation. The Microchip SAM D21 hardware design checklist provides reference layouts.
Do not enable the USB peripheral before configuring the GCLK and DFLL/PLL for 48 MHz - USB requires a precise 48 MHz clock within +/-2500 ppm tolerance. Brown-out reset (BOD) voltage threshold must be set to a value below the minimum expected supply at power-up; using factory-default BOD 3.30 V can cause unexpected reset on noisy supplies. The NVM user row configuration bits (BOOTPROT, EEPROM, LOCKBITS) must be set deliberately; locking without testing can brick the device permanently.
Keep SERCOM signal traces under 50 mm to avoid EMI and signal-integrity issues; longer traces require series damping resistors near the driver. Group SERCOM0/1/2/3/4/5 pins and route together to maintain consistent firmware organization. ADC analog inputs should be isolated from switching digital signals by a ground moat; use a separate analog ground plane tied to the digital ground at a single point near the MCU.
Use 4-layer PCB stack-up with continuous ground plane below the MCU for the 48-pin TQFP; 2-layer boards can work for low-speed SERCOM applications but are marginal for USB. Add 22 ohm to 33 ohm series resistors on USB DP/DM close to the MCU per Microchip USB hardware design guide. Crystal traces should be as short as possible, surrounded by ground pour, and loaded with the datasheet-specified load capacitance matching the crystal manufacturer's tolerance.
Informações de conformidade
RoHS compliant per Microchip product page. Green compound / Pb-free matte-tin finish. AEC-Q100 not qualified - SAM D21 series targets consumer/industrial not automotive ASIL; choose SAM RH71 or SAM S70 for AEC-Q100. REACH SVHC and conflict minerals compliant per Microchip regulatory declarations.
