ATSAMC20G18A-ANT - 48MHz Cortex-M0+ MCU 256KB | Microchip
MPN: ATSAMC20G18A-ANT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.42 | $34.20 |
| 100 | $2.98 | $298.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.34 | $2,340.00 |
ATSAMC20G18A-ANT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The SAM C20 family specifically targets 5V-tolerant designs that require higher noise immunity than typical 3.3V MCUs. As a member of the Cortex-M0+ hierarchy, the ATSAMC20G18A balances low power consumption (Thumb-2 instruction efficiency) with deterministic real-time performance, sitting between simple 8-bit MCUs and higher-performance Cortex-M4/M7 devices in Microchip's portfolio.
Key differentiating features include CAN-FD hardware support for in-vehicle networking, a 12-bit successive-approximation ADC with up to 16 channels, and the PTC for capacitive touch sensing without external components. The device supports SERCOM-configurable serial interfaces (UART, SPI, I2C), and offers up to 84 programmable I/O pins in the family. Its 5V-tolerant I/O simplifies interfacing with industrial sensors and actuators.
Architecturally, the ATSAMC20G18A uses a single-cycle hardware multiply and a Nested Vector Interrupt Controller (NVIC), with the Cortex-M0+ core executing most instructions in one cycle. The device includes a 6-channel Event System for inter-peripheral signaling without CPU intervention, reducing latency for time-critical tasks.
Typical applications include industrial automation controllers, automotive body and lighting ECUs, sensor hubs with capacitive touch, and CAN-FD connected motor control. The wide 2.7V-5.5V supply range and AEC-Q100 qualification also suit harsh-environment deployments.
When designing with this part, choose decoupling capacitors per the datasheet recommendations and ensure SWD programming/debug pins are accessible. The -ANT suffix denotes Tape and Reel packaging with 105C maximum operating temperature.
Drop-in alternatives for ATSAMC20G18A-ANT β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMC20G18A-ANT (same form factor and footprint) β differing in Package, ADC, Operating Temperature, Core Architecture, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMC20G18A-AUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMD20G18A-ANT
β Drop-Inβ In Stock
$2.55 / Unit
View Datasheet βATSAMC20E18A-AUT
β Drop-Inβ In Stock
$2.85 / Unit
View Datasheet βATSAMC20E18A-MUT
β Drop-Inβ In Stock
$1.92 / Unit
View Datasheet βATSAMC20G16A-MNT
β Drop-Inβ In Stock
$2.21 / Unit
View Datasheet βATSAMC20G15A-MUT
β Drop-Inβ In Stock
$1.55 / Unit
View Datasheet βATSAMC20G18A-ANT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ |
| Architecture | 32-bit RISC |
| Maximum Clock Speed | 48 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 32 KB |
| Package | 48-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +105C |
| AEC-Q100 Qualification | Grade 1 |
| ADC Resolution | 12-bit |
| ADC Channels | Up to 16 |
| CAN-FD | Yes |
| PTC (Touch) | Yes (Peripheral Touch Controller) |
| I/O Pins | Up to 84 (family max) |
| SERCOM | Configurable (UART/SPI/I2C) |
| RoHS | Compliant |
| Lead Free | Yes |
ATSAMC20G18A-ANT Pin Configuration
| Pin 1 | PA00 β GPIO / XIN32 |
| Pin 2 | PA01 β GPIO / XOUT32 |
| Pin 3 | VDDIO β Digital I/O supply |
| Pin 4 | GND β Ground |
| Pin 5 | PA02 β GPIO / AIN0 |
| Pin 6 | PA03 β GPIO / AIN1 / VREFA |
| Pin 7 | PA04 β GPIO / AIN2 |
| Pin 8 | PA05 β GPIO / AIN3 |
| Pin 9 | PA06 β GPIO / AIN4 |
| Pin 10 | PA07 β GPIO / AIN5 |
| Pin 11 | VDDANA β Analog supply |
| Pin 12 | GNDANA β Analog ground |
| Pin 13 | PA08 β GPIO / AIN6 |
| Pin 14 | PA09 β GPIO / AIN7 |
| Pin 15 | PA10 β GPIO / AIN8 |
| Pin 16 | PA11 β GPIO / AIN9 |
| Pin 17 | PA12 β GPIO |
| Pin 18 | PA13 β GPIO |
| Pin 19 | PA14 β GPIO |
| Pin 20 | PA15 β GPIO |
| Pin 21 | PA16 β GPIO / SERCOM1 |
| Pin 22 | PA17 β GPIO / SERCOM1 |
| Pin 23 | PA18 β GPIO / SERCOM1 |
| Pin 24 | PA19 β GPIO / SERCOM1 |
| Pin 25 | PA20 β GPIO / SERCOM3 |
| Pin 26 | PA21 β GPIO / SERCOM3 |
| Pin 27 | PA22 β GPIO / SERCOM3 |
| Pin 28 | PA23 β GPIO / SERCOM3 |
| Pin 29 | PA24 β GPIO / SERCOM5 |
| Pin 30 | PA25 β GPIO / SERCOM5 |
| Pin 31 | PA26 β GPIO |
| Pin 32 | PA27 β GPIO |
| Pin 33 | PA28 β GPIO |
| Pin 34 | PA29 β GPIO |
| Pin 35 | PA30 β GPIO / SWCLK |
| Pin 36 | PA31 β GPIO / SWDIO |
| Pin 37 | RESET β Reset input (active low) |
| Pin 38 | VDDIO β Digital I/O supply |
| Pin 39 | GND β Ground |
| Pin 40 | PB00 β GPIO / CAN TX |
| Pin 41 | PB01 β GPIO / CAN RX |
| Pin 42 | PB02 β GPIO |
| Pin 43 | PB03 β GPIO |
| Pin 44 | PB04 β GPIO |
| Pin 45 | PB05 β GPIO |
| Pin 46 | PB06 β GPIO |
| Pin 47 | PB07 β GPIO |
| Pin 48 | PB08 β GPIO |
Typical Applications
ATSAMC20G18A-ANT is suitable for 6 applications: Automotive Body Control Modules, Industrial Sensor Hubs with Touch, CAN-FD Connected Motor Control, Smart Home Sensor Nodes, Medical Monitoring Devices, HVAC Climate Control Units.
Automotive Body Control Modules
The ATSAMC20G18A-ANT fits automotive body control modules due to its AEC-Q100 Grade 1 qualification (-40C to +125C), integrated CAN-FD controller, and 5V-tolerant I/O. The 256KB Flash supports CAN-FD protocol stacks plus application logic for body controllers managing lighting, door modules, and seat controls. The 12-bit ADC handles sensor inputs (temperature, current, position), while the 48MHz Cortex-M0+ provides sufficient processing for body-domain tasks without overprovisioning cost. The 48-TQFP package fits compact PCB form factors common in modern vehicle body ECUs.
Recommended
Industrial Sensor Hubs with Touch
The ATSAMC20G18A-ANT's Peripheral Touch Controller (PTC) supports capacitive touch sensing without external touch ICs, making it ideal for industrial HMI panels and sensor hubs. The 5V supply tolerance interfaces directly with industrial 24V-derived rails and 5V sensor buses. The 256KB Flash accommodates touch firmware plus communication stacks (CAN-FD, UART, SPI), while 32KB SRAM handles touch scanning buffers and protocol data. Engineers can implement up to several dozen touch buttons or a small touch slider with the integrated PTC hardware.
Recommended
CAN-FD Connected Motor Control
The ATSAMC20G18A-ANT provides deterministic real-time control for small motor drives when paired with external gate drivers. Its Event System enables hardware-triggered ADC sampling synchronized to PWM edges, achieving precise current sensing without CPU overhead. The CAN-FD peripheral supports modern motor-control protocols for multi-axis coordination in factory automation. The 256KB Flash stores field-oriented control (FOC) firmware plus CAN-FD stacks, and the 5V I/O interfaces directly with industrial 5V gate drivers, simplifying BOM and reducing level-shifters on the control board.
Recommended
Smart Home Sensor Nodes
The ATSAMC20G18A-ANT suits connected sensor nodes for smart home and building automation, leveraging its low-power Cortex-M0+ core, 256KB Flash for Zigbee/Thread-like protocol stacks via SPI peripherals, and SERCOM-configurable interfaces for sensor expansion. The 5V tolerance allows direct connection to USB-powered or 5V-rail designs without level translation. CAN-FD support is over-spec for some home networks but provides migration headroom as building automation increasingly adopts automotive-derived protocols.
Recommended
Medical Monitoring Devices
The ATSAMC20G18A-ANT's 12-bit ADC and AEC-Q100 qualification support medical monitoring peripherals such as patient-side sensor interfaces (non-implantable, non-life-critical). The Cortex-M0+ deterministic performance ensures consistent sampling intervals for vital-sign monitoring front-ends. The 256KB Flash accommodates wireless protocol stacks (BLE via external module, SPI-attached) plus data logging buffers. The 5V supply tolerance simplifies integration with battery charger ICs and 5V-rail subsystems commonly found in portable medical carts.
Recommended
HVAC Climate Control Units
The ATSAMC20G18A-ANT supports HVAC climate controllers through its multi-channel 12-bit ADC (reading temperature/humidity sensors), SERCOM interfaces for display/keypad panels, and CAN-FD for inter-zone communication in larger buildings. The 256KB Flash stores control algorithms plus communication firmware, while the 5V supply simplifies integration with industrial HVAC control boards. The Cortex-M0+ core executes PID loops with deterministic timing using the Event System for hardware-triggered ADC scans synchronized to control loop periods.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20G18A-ANT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20G18A-AUT | ATSAMD20G18A-ANT | ATSAMC20E18A-AUT | ATSAMC20E18A-MUT | ATSAMC20G16A-MNT | ATSAMC20G15A-MUT |
|---|---|---|---|---|---|---|---|
| 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 | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ | Cortex-M0+ |
| Clock Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB | 32 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 4 KB |
| CAN-FD | Yes | Yes | No | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +85C |
| Supply Voltage | 2.7V to 5.5V (5V tolerant) | 2.7V to 5.5V | 1.62V to 3.6V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
Key Differentiators
- 5V supply tolerance with CAN-FD in same 48-TQFP footprint (vs ATSAMD20G18A-ANT)
- AEC-Q100 Grade 1 qualification (vs ATSAMC20G18A-AUT)
- Higher Flash density in same pin-count package (vs ATSAMC20G16A-MNT)
- Drop-in compatibility with SAM D20 family (vs ATSAMD20G18A-ANT)
Design Notes
Estimated: At 48MHz active mode with all peripherals enabled, the ATSAMC20G18A-ANT draws approximately 8-10 mA from VDDIO at 3.3V. Place a 100nF decoupling capacitor as close as possible to each VDDIO/VSS pin pair, plus a bulk 4.7uF capacitor near the IC. For the analog supply VDDANA, add a ferrite bead or 10 ohm resistor between VDDIO and VDDANA, with 100nF + 10uF decoupling on the analog side to reduce ADC noise coupling from digital switching.
Route the SWDIO and SWCLK signals (PA30, PA31) with short, direct traces and avoid routing parallel to high-frequency switching signals. Place a 100nF capacitor on RESET if not using external reset IC. For CAN-FD applications, route PB00 (CAN TX) and PB01 (CAN RX) to a transceiver (such as MCP2518FD or ATA6560) with characteristic impedance-controlled traces (typically 120 ohm differential) and place the transceiver near the connector.
When using the 12-bit ADC for precision measurements, avoid switching digital signals near analog input traces during ADC conversions. Use the Event System to trigger ADC conversions synchronized to avoid noise events. The on-chip PTC for capacitive touch uses specific pin configurations - refer to the QTouch library and datasheet PTC section for proper electrode design, grounding, and noise immunity. For best ADC performance, oversample and average in software.
Do not assume the 5V supply tolerance extends to absolute maximum ratings - voltage transients above 5.5V (such as load-dump on automotive supplies) require external TVS protection. The CAN-FD peripheral requires proper bus termination (120 ohm at each end) for reliable high-speed operation. When migrating from SAM D20 firmware, verify that peripheral library calls are updated for SAM C20 (different CMSIS device header file). The GPNVM bits control Flash security and boot configuration - configure them explicitly in production firmware.
Compliance Information
AEC-Q100 Grade 1 qualified per Microchip product specifications. RoHS and REACH compliant per Microchip product page. Halogen-free status not explicitly stated in available web data.
