ATSAMDA1G15B-MBT - ARM Cortex-M0+ MCU 48MHz 32KB Flash | Microchip
MPN: ATSAMDA1G15B-MBT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.97 | $1.97 |
| 10 | $1.76 | $17.60 |
| 100 | $1.55 | $155.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.1 | $1,100.00 |
ATSAMDA1G15B-MBT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The SAM DA1 family belongs to the broader ARM Cortex-M0+ class of microcontrollers, which are widely used for low-power, deterministic embedded control. Within the Microchip portfolio, SAM DA1 sits between the smaller SAMD10/D11 series and the higher-performance SAMD20/D21 family, targeting cost-sensitive functional-safety applications. The 'A' suffix in DA1 designates the AEC-Q100 automotive-grade family, and the Functional Safety (FuSa) variant adds safety documentation, FMEDA, and diagnostic libraries suited to ISO 26262 ASIL-B designs.
Key features of the ATSAMDA1G15B-MBT include the Cortex-M0+ core with single-cycle I/O access, a full-speed USB 2.0 device interface, 12-bit ADC up to 350 ksps, 10-bit DAC, multiple timers (TC, RTC), and a Peripheral Touch Controller (PTC) supporting capacitive sensing. The device also has a 12-channel event system, configurable SERCOM peripherals, and an integrated 32.768 kHz oscillator for RTC operation. DMA support through eight channels keeps CPU load low when servicing high-throughput peripherals.
Architecturally, the SAM DA1 uses a 32-bit ARMv6-M instruction set, a 2-layer AHB bus matrix, and Microchip's proprietary Atmel Start / Harmony 3 peripheral library. The QFN-48 package provides an exposed thermal pad that lowers junction-to-PCB thermal resistance, supporting higher ambient operating temperatures for automotive under-hood and industrial environments.
Typical applications include automotive body electronics (BCM, lighting, HVAC), industrial sensor hubs, smart appliances, USB HID peripherals, capacitive-touch human-machine interfaces, and functional-safety sub-systems such as sensor monitoring and actuator control in vehicle ECUs. The AEC-Q100 qualification and FuSa documentation make it especially attractive for safety-critical automotive subsystems.
When designing with this MCU, ensure decoupling is placed within 5 mm of each power pin and that the exposed pad is soldered to a continuous ground pour to achieve the datasheet thermal performance. Choose between the MBT (QFN-48) and ABT (TQFP-48) variants based on assembly process: QFN requires reflow with bottom pad soldering, while TQFP supports standard wave or reflow.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that go beyond the manufacturer datasheet. Engineers searching for ATSAMDA1G15B-MBT specifications, pinout, datasheet PDF, AEC-Q100 grade, or SAM DA1 cross-reference will find verified parameters and drop-in replacement guidance here.
Drop-in alternatives for ATSAMDA1G15B-MBT — 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 ATSAMDA1G15B-MBT (same form factor and footprint) — differing in Package, SERCOM Modules, ADC, Operating Temperature, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMDA1G15B-ABT
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →ATSAMDA1G16B-MBT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMDA1E16B-ABT
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ATSAMDA1G14B-MBT
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →ATSAMDA1G15B-MBT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (ARMv6-M) |
| Family | SAM DA1 (Functional Safety / AEC-Q100) |
| Maximum CPU Frequency | 48 MHz (45 DMIPS) |
| Program Flash | 32 KB (32K x 8) |
| Read-While-Write Flash | 1 KB |
| SRAM | 4 KB |
| Supply Voltage (VDDIN) | 1.62 V to 3.63 V |
| Core Mark / Architecture | 32-bit |
| SERCOM Modules | 6 (each configurable as USART / I2C / SPI) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit |
| USB | Full-Speed USB 2.0 Device |
| Peripheral Touch Controller (PTC) | Supported |
| Timers | TC, TCC, RTC |
| DMA Channels | 8 |
| Package | 48-QFN (7x7 mm) with exposed pad |
| Operating Temperature | -40 C to +85 C (industrial grade) |
| Mounting Type | Surface Mount |
| MSL Level | MSL3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
ATSAMDA1G15B-MBT Pin Configuration
| Pin 1 | VDDIN — Main supply input (1.62 V to 3.63 V) |
| Pin 2 | PA00 — GPIO / SERCOM1[0] / ADC[0] |
| Pin 3 | PA01 — GPIO / SERCOM1[1] / ADC[1] |
| Pin 4 | PA02 — GPIO / SERCOM0[0] / ADC[2] / DAC[0] |
| Pin 5 | PA03 — GPIO / SERCOM0[1] / ADC[3] / DAC[1] |
| Pin 6 | PA04 — GPIO / SERCOM0[2] / ADC[4] / VREFA |
| Pin 7 | VDDANA — Analog supply input |
| Pin 8 | GND — Ground |
| Pin 9 | PA05 — GPIO / SERCOM0[3] / ADC[5] |
| Pin 10 | PA06 — GPIO / SERCOM0[4] / ADC[6] |
| Pin 11 | PA07 — GPIO / SERCOM0[5] / ADC[7] |
| Pin 12 | PA08 — GPIO / SERCOM2[0] / ADC[8] |
| Pin 13 | PA09 — GPIO / SERCOM2[1] / ADC[9] |
| Pin 14 | PA10 — GPIO / SERCOM2[2] / ADC[10] |
| Pin 15 | PA11 — GPIO / SERCOM2[3] / ADC[11] |
| Pin 16 | PA12 — GPIO / SERCOM4[0] / PTC[X0] |
| Pin 17 | PA13 — GPIO / SERCOM4[1] / PTC[X1] |
| Pin 18 | PA14 — GPIO / SERCOM4[2] / PTC[X2] |
| Pin 19 | PA15 — GPIO / SERCOM4[3] / PTC[X3] |
| Pin 20 | PA16 — GPIO / SERCOM3[0] / PTC[X4] |
| Pin 21 | PA17 — GPIO / SERCOM3[1] / PTC[X5] |
| Pin 22 | PA18 — GPIO / SERCOM3[2] / PTC[X6] |
| Pin 23 | PA19 — GPIO / SERCOM3[3] / PTC[X7] |
| Pin 24 | PA20 — GPIO / SERCOM5[2] / PTC[Y0] |
| Pin 25 | PA21 — GPIO / SERCOM5[3] / PTC[Y1] |
| Pin 26 | PA22 — GPIO / SERCOM3[0] / PTC[Y2] |
| Pin 27 | PA23 — GPIO / SERCOM3[1] / PTC[Y3] |
| Pin 28 | PA24 — GPIO / SERCOM3[2] / USB_DM |
| Pin 29 | PA25 — GPIO / SERCOM3[3] / USB_DP |
| Pin 30 | GND — Ground |
| Pin 31 | PA26 — GPIO / SERCOM5[0] |
| Pin 32 | PA27 — GPIO / SERCOM5[1] |
| Pin 33 | PA28 — GPIO / SERCOM5[2] / RESET |
| Pin 34 | PA29 — GPIO / SERCOM5[3] |
| Pin 35 | PA30 — GPIO / SERCOM1[0] / SWCLK |
| Pin 36 | PA31 — GPIO / SERCOM1[1] / SWDIO |
| Pin 37 | PB00 — GPIO / SERCOM5[2] |
| Pin 38 | PB01 — GPIO / SERCOM5[3] |
| Pin 39 | PB02 — GPIO / SERCOM5[0] / ADC[14] |
| Pin 40 | PB03 — GPIO / SERCOM5[1] / ADC[15] |
| Pin 41 | PB04 — GPIO / SERCOM3[0] |
| Pin 42 | PB05 — GPIO / SERCOM3[1] |
| Pin 43 | PB06 — GPIO / SERCOM3[2] |
| Pin 44 | PB07 — GPIO / SERCOM3[3] |
| Pin 45 | PB08 — GPIO / SERCOM4[0] |
| Pin 46 | PB09 — GPIO / SERCOM4[1] |
| Pin 47 | PB10 — GPIO / SERCOM4[2] |
| Pin 48 | PB11 — GPIO / SERCOM4[3] |
Typical Applications
ATSAMDA1G15B-MBT is suitable for 6 applications: Automotive Body Control Module (BCM), Capacitive Touch HMI (Automotive Infotainment Knobs / Industrial Panels), USB HID Peripheral (Industrial Programmers / Dongles), Industrial Sensor Hub / IoT Edge Node, Functional Safety Sensor Monitor (ISO 26262 ASIL-B), Smart Appliance Control Board (HVAC / White Goods).
Automotive Body Control Module (BCM)
The ATSAMDA1G15B-MBT fits automotive BCM designs because of its AEC-Q100 Functional Safety qualification and 48 MHz Cortex-M0+ core, which delivers deterministic interrupt response for body-electronics tasks such as lighting, wiper control, and door-lock sequencing. Its six SERCOM peripherals can each be configured as UART, SPI, or I2C, allowing the MCU to fan out to multiple LIN transceivers, LED drivers, and sensor hubs without external multiplexer ICs. The 32 KB Flash plus 1 KB RWW Flash supports EEPROM emulation for non-volatile fault logs and trim values, while the 12-bit ADC reads battery voltage and temperature sensors directly. The QFN-48 package with exposed pad enables compact PCB layouts under 25 mm x 25 mm, suitable for the distributed ECU nodes typical of modern vehicles.
Recommended
Capacitive Touch HMI (Automotive Infotainment Knobs / Industrial Panels)
The ATSAMDA1G15B-MBT is well suited for capacitive-touch human-machine interfaces because of its on-chip Peripheral Touch Controller (PTC), which supports mutual-capacitance and self-capacitance touch sensing without an external touch IC. The PTC offloads scan timing from the CPU, allowing the Cortex-M0+ to handle debouncing, gesture recognition, and host-side communication in parallel. Combined with the 12-bit ADC for backlight brightness control and the six SERCOM ports for SPI display and I2C LED drivers, this MCU can implement a complete 12-key touch panel plus rotary encoder in a single chip. AEC-Q100 qualification allows the same hardware to be reused across consumer and automotive product lines, reducing BOM and qualification cost.
Recommended
USB HID Peripheral (Industrial Programmers / Dongles)
The ATSAMDA1G15B-MBT's integrated Full-Speed USB 2.0 device interface and 32 KB Flash make it a strong fit for USB Human Interface Device (HID) class peripherals such as industrial programmers, configuration dongles, and diagnostics interfaces. The Cortex-M0+ core at 48 MHz can sustain 12 Mbps USB traffic with negligible CPU load thanks to the eight DMA channels that service the USB endpoint buffers autonomously. The 1 KB RWW Flash provides dedicated non-volatile storage for device descriptors and licensing keys that can be updated in the field without disrupting USB enumeration. Combined with AEC-Q100 qualification, the same firmware image can ship across industrial and automotive diagnostic SKUs.
Recommended
Industrial Sensor Hub / IoT Edge Node
The ATSAMDA1G15B-MBT works well in industrial sensor hubs that aggregate Modbus, 4-20 mA, and I2C sensor data into a single gateway. Six SERCOM ports can be split between RS-485 UARTs, I2C sensor clusters, and SPI ADC channels, while the 12-bit ADC with up to 350 ksps can directly sample analog front-end signals. The 4 KB SRAM is sufficient to buffer ~1000 samples of 16-bit data before transmitting, and the SERCOM-based SPI can drive an external Ethernet or wireless transceiver such as the W5500 or RN4871. The 1.62 V to 3.63 V supply range supports direct connection to battery stacks, making it suitable for solar-powered remote sensor installations.
Recommended
Functional Safety Sensor Monitor (ISO 26262 ASIL-B)
The ATSAMDA1G15B-MBT is explicitly designed for ISO 26262 ASIL-B sensor monitoring subsystems, where it pairs with a higher-performance host MCU to validate sensor health and report faults over CAN or LIN. The on-chip ADC, comparators, and self-test routines supported by the FuSa documentation enable BIST (built-in self-test) of analog signal chains at boot and runtime. The Cortex-M0+ deterministic interrupt latency ensures watchdog timer servicing meets ASIL-B timing constraints, and the 1 KB RWW Flash stores diagnostic trouble codes (DTCs) without interrupting the main application. AEC-Q100 plus FuSa collateral means automotive Tier-1s can integrate this MCU into safety cases with reduced documentation overhead.
Recommended
Smart Appliance Control Board (HVAC / White Goods)
The ATSAMDA1G15B-MBT is well suited for HVAC and white-goods control boards that demand a balance of cost, deterministic control, and reliability. Its six SERCOM ports can interface to triac drivers, zero-cross detectors, and rotary encoder feedback loops, while the RTC with 32.768 kHz crystal support enables accurate scheduling for wash cycles and thermostat programs. The Peripheral Touch Controller replaces discrete capacitive-touch ICs on user panels, reducing BOM cost by ~$0.50 per board. The 1.62 V minimum supply allows operation directly from a 2-cell alkaline or single-cell Li-ion source without a boost converter, simplifying the power tree in battery-backed appliances.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMDA1G15B-MBT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMDA1G15B-ABT | ATSAMDA1G16B-MBT | ATSAMDA1E16B-ABT | ATSAMDA1G14B-MBT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-QFN (7x7) | TQFP-48 | 48-QFN (7x7) | TQFP-48 | 48-QFN (7x7) |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 32 KB | 32 KB | 64 KB | 64 KB | 16 KB |
| SRAM | 4 KB | 4 KB | 8 KB | 8 KB | 2 KB |
| RWW Flash | 1 KB | 1 KB | 2 KB | 2 KB | 1 KB |
| AEC-Q100 / FuSa | Yes (ASIL-B) | Yes (ASIL-B) | Yes (ASIL-B) | Yes (ASIL-B) | Yes (ASIL-B) |
| 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 |
Key Differentiators
- Functional Safety (FuSa) collateral targeting ISO 26262 ASIL-B out of the box (vs ATSAMD21G15B-MUT)
- Six independent SERCOM peripherals, each configurable as USART / I2C / SPI (vs ATSAMDA1G14B-MBT)
- Integrated Peripheral Touch Controller (PTC) eliminates external touch IC (vs PIC16F877A-I/P)
Design Notes
Solder the central exposed pad of the QFN-48 to a continuous ground pour with at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) to achieve the datasheet thermal resistance and avoid junction-temperature rise. Place a 100 nF decoupling capacitor within 5 mm of every VDD pin and a single 4.7 uF bulk capacitor near the VDDIN pin. The USB DP/DM traces (pins 28/29) must be length-matched to within 2 mm and routed with 45-degree bends only - per Microchip's USB design guide.
Power the VDDANA pin from the same 3.3 V LDO as VDDIN but with a ferrite bead or 10 ohm resistor to isolate ADC reference noise. The DAC and ADC share the analog supply, so noisy digital loads on VDDIN should not share a trace with VDDANA. Estimated: at 48 MHz and full peripheral activity, total IDD is approximately 8 mA, leaving margin for the internal 8 MHz oscillator and ADC sample-and-hold.
Do not leave the SWDIO/SWCLK pins floating during normal operation - they must be pulled to defined logic levels through 100 kohm resistors to prevent unintended debug-entry on noise events. The NRESET pin (pin 33) requires an external 10 kohm pull-up and a 100 nF capacitor for noise filtering, even when the internal pull-up is enabled in firmware. For AEC-Q100 designs, validate brown-out detector (BOD) thresholds against the actual battery cold-cranking profile.
Keep SERCOM traces short (under 50 mm) and route them away from switching power and PTC sense lines to avoid coupling capacitive-touch noise into the digital comm channels. The PTC X/Y lines should be guarded by a ground pour on both sides to prevent crosstalk, and the shield layer underneath the touch sensor must be a hatched ground, not a solid pour, to balance sensitivity vs. parasitic capacitance.
Compliance Information
AEC-Q100 qualified per Microchip SAM DA1 family datasheet; Functional Safety documentation supports ISO 26262 ASIL-B. RoHS and REACH compliance per Microchip product page; halogen-free per industry-standard QFN-48 leadframe process.
