ATSAMD20G16A-AN - ARM Cortex-M0+ MCU, 64KB Flash, 48TQFP | Microchip
Référence : ATSAMD20G16A-AN ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.1 | $3,10 |
| 10 | $2.84 | $28,40 |
| 100 | $2.55 | $255,00 |
| 500 | $2.27 | $1 135,00 |
| 1 000 | $2.02 | $2 020,00 |
ATSAMD20G16A-AN Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable peripherals. The Cortex-M0+ is ARM's most energy-efficient 32-bit core, optimized for deterministic interrupt response and low active/sleep power. The SAM D20 family extends this foundation with Microchip's Atmel-era peripheral set including SERCOM, Event System, and PTC, making it a popular choice for cost-sensitive embedded designs.
Key features of the ATSAMD20G16A-AN include 38 programmable I/O pins, an operating voltage range of 1.62V to 3.63V, brown-out detect, power-on reset, watchdog timer, RTC with calendar mode, and a full-speed USB 2.0 device interface in higher-pin variants. The 12-bit ADC offers up to 16 analog inputs with hardware averaging, while the 10-bit DAC provides buffered analog output for sensor excitation or waveform generation.
The SAM D20 architecture uses a single-cycle hardware multiplier and a Nested Vectored Interrupt Controller (NVIC) for deterministic latency. The Event System allows peripherals to communicate without CPU intervention, enabling energy-efficient operation by keeping the CPU in sleep mode while data flows autonomously. The PTC peripheral scans up to 256 mutual-capacitance or self-capacitance electrodes for touch interfaces without external components.
Typical applications include home automation controllers, smart metering, low-power wireless sensor nodes, consumer electronics with touch interfaces, and industrial HMI panels. The wide 1.62V-3.63V supply range and integrated peripherals reduce BOM cost in battery-powered systems where multiple voltage rails are undesirable.
When designing with the ATSAMD20G16A-AN, ensure that firmware is loaded via SWD or the factory-programmed boot loader; Microchip's Atmel Studio 7 and MPLAB X IDE both support this part. Decoupling: place 100 nF X7R ceramics on each VDD pin and a 4.7 uF bulk capacitor on the main rail.
This page consolidates verified distributor pricing, drop-in alternatives, and PCB-level design guidance derived from Microchip application notes — information not aggregated on the manufacturer datasheet alone.
Alternatives de remplacement direct pour ATSAMD20G16A-AN — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAMD20G16A-AN (même facteur de forme et même empreinte) — différant par ADC, SERCOM Modules, Package, RoHS Status, SRAM.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAMD20G15A-ANT
✅ Remplacement direct✓ En stock
$1.68 / unité
Voir la fiche technique →ATSAMD20G14A-AN
✅ Remplacement direct✓ En stock
$2.03 / unité
Voir la fiche technique →ATSAMD20E16A-AN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMD20G16A-AU
✅ Remplacement direct✓ En stock
$2.78 / unité
Voir la fiche technique →ATSAMD21G16A-AN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMD20G16A-AN Valeurs maximales et caractéristiques électriques
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-bit single-core |
| Maximum Clock Speed | 48 MHz |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 1.62 V to 3.63 V |
| Number of I/O Pins | 38 |
| Boîtier | 48-pin TQFP (7x7 mm) |
| Connectivity | I2C, SPI, UART/USART |
| ADC | 12-bit, up to 16 channels |
| DAC | 10-bit |
| Peripheral Touch Controller (PTC) | 256 channels |
| Température de fonctionnement | -40 C to +105 C (industrial) |
| Statut RoHS | Compliant |
| Type de montage | Surface Mount (gull-wing) |
Configuration des broches de ATSAMD20G16A-AN
| Broche 1 | PA00 — GPIO / XIN32 |
| Broche 2 | PA01 — GPIO / XOUT32 |
| Broche 3 | PA02 — GPIO / AIN0 |
| Broche 4 | PA03 — GPIO / AIN1 / VREFA |
| Broche 5 | GND — Ground |
| Broche 6 | VDD — Supply voltage |
| Broche 7 | VDDCORE — Core supply (decoupling cap) |
| Broche 8 | PA04 — GPIO / AIN2 |
| Broche 9 | PA05 — GPIO / AIN3 |
| Broche 10 | PA06 — GPIO / AIN4 |
| Broche 11 | PA07 — GPIO / AIN5 |
| Broche 12 | PA08 — GPIO / AIN6 / SERCOM0 PAD0 |
| Broche 13 | PA09 — GPIO / AIN7 / SERCOM0 PAD1 |
| Broche 14 | PA10 — GPIO / AIN8 / SERCOM0 PAD2 |
| Broche 15 | PA11 — GPIO / AIN9 / SERCOM0 PAD3 |
| Broche 16 | PA12 — GPIO / SERCOM2 PAD0 |
| Broche 17 | PA13 — GPIO / SERCOM2 PAD1 |
| Broche 18 | PA14 — GPIO / SERCOM2 PAD2 |
| Broche 19 | PA15 — GPIO / SERCOM2 PAD3 |
| Broche 20 | PA16 — GPIO / SERCOM1 PAD0 / I2S MCK |
| Broche 21 | PA17 — GPIO / SERCOM1 PAD1 / I2S SCK |
| Broche 22 | PA18 — GPIO / SERCOM1 PAD2 / I2S FS |
| Broche 23 | PA19 — GPIO / SERCOM1 PAD3 / I2S SD |
| Broche 24 | PA20 — GPIO / SERCOM3 PAD0 |
| Broche 25 | PA21 — GPIO / SERCOM3 PAD1 |
| Broche 26 | PA22 — GPIO / SERCOM3 PAD2 |
| Broche 27 | PA23 — GPIO / SERCOM3 PAD3 |
| Broche 28 | PA24 — GPIO / SERCOM5 PAD0 |
| Broche 29 | PA25 — GPIO / SERCOM5 PAD1 |
| Broche 30 | PB00 — GPIO / SERCOM5 PAD2 |
| Broche 31 | PB01 — GPIO / SERCOM5 PAD3 |
| Broche 32 | PB02 — GPIO / SERCOM4 PAD0 |
| Broche 33 | PB03 — GPIO / SERCOM4 PAD1 |
| Broche 34 | PB04 — GPIO / SERCOM4 PAD2 |
| Broche 35 | PB05 — GPIO / SERCOM4 PAD3 |
| Broche 36 | PB06 — GPIO |
| Broche 37 | PB07 — GPIO |
| Broche 38 | PB08 — GPIO |
| Broche 39 | PB09 — GPIO |
| Broche 40 | PA27 — GPIO |
| Broche 41 | RESET — Reset input (active low) |
| Broche 42 | PA28 — GPIO |
| Broche 43 | GND — Ground |
| Broche 44 | VDD — Supply voltage |
| Broche 45 | PA30 — SWDIO / GPIO |
| Broche 46 | PA31 — SWCLK / GPIO |
| Broche 47 | PB22 — GPIO / SERCOM3 PAD0 alt |
| Broche 48 | PB23 — GPIO / SERCOM3 PAD1 alt |
Applications typiques
ATSAMD20G16A-AN convient pour 7 applications: Home Automation Controller, Smart Metering, Industrial HMI Panels, Wearable Fitness Devices, Consumer Appliance Control, IoT Sensor Edge Nodes, Touch-Key Replacement Designs.
Home Automation Controller
The ATSAMD20G16A-AN suits home automation hubs where cost, energy efficiency, and touch interfaces matter. The 64 KB Flash accommodates Zigbee/BLE stack libraries while the 256-channel Peripheral Touch Controller supports capacitive buttons and sliders on the front panel. Six SERCOM channels provide flexible UART/SPI/I2C for sensor aggregation, and the 1.62-3.63V supply range allows direct connection to 2xAA batteries or 3.3V regulated rails without level shifters. Sleep current near 2 uA with RTC running enables battery-powered door sensors and window contacts lasting multiple years on a single cell.
Recommandé
Smart Metering
For electricity, water, and gas meters, the ATSAMD20G16A-AN provides the 12-bit ADC for sensor signal acquisition and a 10-bit DAC for self-test excitation. The Event System allows the ADC to trigger DMA-equivalent data transfer without CPU intervention, keeping the device in sleep between conversions. RTC with calendar function supports time-of-use tariff logic, while brown-out detect and watchdog timer ensure reliable operation through power-line disturbances typical of metering installations. The 48-TQFP package supports both through-hole and reflow assembly.
Recommandé
Industrial HMI Panels
Human-machine interfaces benefit from the ATSAMD20G16A-AN's PTC touch controller, which scans up to 256 capacitive electrodes for buttons and slider widgets without external touch ASICs. Combined with SPI-connected TFT displays, designers can drive QVGA panels up to 320x240 with the SERCOM and DMA-equivalent event routing. The 48 MHz CPU performs sufficiently for animated menu transitions, and the 1.62-3.63V supply operates directly from 3.3V industrial backplanes. The -40 C to +105 C rating supports factory floor installations.
Recommandé
Wearable Fitness Devices
Wearable bands and fitness trackers rely on low active power consumption and integrated peripherals. The ATSAMD20G16A-AN's approximately 7 mA/MHz active current and 2 uA sleep current allow multi-day battery life with heart-rate monitoring enabled. Six SERCOM channels interface I2C biometric sensors (PPG, temperature) and SPI accelerometers, while the 12-bit ADC reads Li-ion battery voltage and optional galvanic skin response electrodes. The small 7x7 mm TQFP package fits wrist-strap form factors and supports reflow soldering on flex PCBs.
Recommandé
Consumer Appliance Control
White goods such as washing machines, coffee makers, and induction cooktops use the ATSAMD20G16A-AN as the user-interface and motor-control supervisor. The 38 GPIO pins drive LED status indicators, mechanical relays, and triac-based AC switching. Brown-out detection and watchdog timer protect against brown-outs during compressor cycling. Six SERCOM channels connect UART/SPI motor controller ASICs, I2C EEPROM for settings persistence, and a UART interface for factory programming. The wide supply range tolerates rectified mains-derived 3.3V rails.
Recommandé
IoT Sensor Edge Nodes
IoT edge nodes aggregating sensor data over LoRa, sub-GHz RF, or low-power BLE benefit from the ATSAMD20G16A-AN's combination of low sleep current and flexible serial interfaces. Three independent I2C buses (via SERCOM remap) connect multiple environmental sensors simultaneously, while a single SPI channel handles LoRa transceivers up to 50 MHz. Event System routing lets ADC-triggered conversions feed directly to RAM without waking the CPU. The 64 KB Flash accommodates LoRaWAN or BLE 5.x stacks plus application code.
Recommandé
Touch-Key Replacement Designs
Designers replacing mechanical buttons with capacitive touch benefit from the ATSAMD20G16A-AN's Peripheral Touch Controller (PTC). Up to 256 mutual-capacitance electrodes support complex matrices for sliders and rotary encoders without external touch ICs. Hardware-driven acquisition reduces CPU overhead, allowing sleep-mode operation between touches. Combined with the 12-bit ADC for proximity sensing, a single chip handles all user input. The PTC library is integrated into Atmel START and MPLAB Code Configurator for rapid development.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAMD20G16A-AN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATSAMD20G15A-AN | ATSAMD20G14A-AN | ATSAMD20E16A-AN | ATSAMD20G16A-AU | ATSAMD21G16A-AN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ (D21) |
| Flash Memory | 64 KB | 32 KB | 16 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| 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 |
| USB 2.0 | No | No | No | Yes (FS device) | No | Yes (FS device, D21 family) |
| GPIO Count | 38 | 38 | 38 | 38 | 38 | 38 |
| AEC-Q100 Qualified | No | No | No | No | No | No (use ATSAMHA1G) |
Principaux différenciateurs
- Mid-density Flash with full SAM D20 peripheral set (vs ATSAMD20G15A-AN)
- Built-in USB at no Flash cost (vs ATSAMD20E16A-AN)
- SAM D20 simplicity versus SAM D21 complexity (vs ATSAMD21G16A-AN)
Notes de conception
Estimated: at 48 MHz active and 3.3 V supply, the ATSAMD20G16A-AN draws approximately 7 mA/MHz, or 7 mA * 48 MHz / 48 MHz = 7 mA total. Decouple each VDD pin with a 100 nF X7R 0402 ceramic placed within 2 mm of the pin. Add a 4.7 uF bulk capacitor on the main supply rail. The VDDCORE pin (7) requires a 1 uF X7R capacitor close to the pin for internal LDO stability. For sleep-mode operation, configure NVMCTRL.CTRLB to disable flash prefetch and run the CPU at 4 MHz from the internal 8 MHz oscillator divided by 2 to reduce active current below 2 mA.
Estimated: route the SWDIO/SWCLK pair (PA30/PA31) as a 50 ohm impedance-controlled differential pair, ideally with via stitching along the trace to maintain a continuous return path. The 48-pin TQFP package has 0.5 mm pitch leads; use 0.2 mm trace width with 0.1 mm spacing to maintain manufacturability on standard 1 oz copper. Place the 32.768 kHz crystal traces within 5 mm of pins 1-2 (PA00/PA01) and surround them with a GND guard ring to minimize noise injection into the RTC domain.
Do not connect PA30/PA31 to external circuitry at reset; these pins are reserved for SWD debugging and may be sampled during boot loader activation. If serial firmware upload via boot loader is needed, leave PA10/PA11 (SERCOM0) free for UART connection. The NVMCTRL requires an unlock sequence before flash writes - this is handled by ASF but must be replicated in bare-metal code. Brown-out reset threshold defaults to 1.6 V; setting it too low causes spurious resets during battery discharge.
The 48-TQFP package has a thermal resistance of approximately 38 C/W (theta_JA) on a standard 4-layer JEDEC test board. Estimated: at 7 mA active current and 3.3 V supply, power dissipation is 23 mW, leading to a junction temperature rise of approximately 0.9 C above ambient - well within industrial temperature limits. For continuous operation at 105 C ambient, ensure the PCB copper pour on VDD pins is at least 50 mm^2 to maintain this margin. The thermal shutdown threshold is 120 C, well above the industrial maximum.
Informations de conformité
RoHS and REACH compliant per Microchip product page declaration. Not AEC-Q100 qualified; for automotive designs use SAM HA0 family. Lead-free TQFP package option denoted by 'AN' suffix.
