ATSAM4SD16BA-AU - 120MHz Cortex-M4 MCU 1MB Flash | Microchip
MPN: ATSAM4SD16BA-AU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.85 | $13.85 |
| 10 | $12.42 | $124.20 |
| 100 | $10.95 | $1,095.00 |
| 500 | $9.78 | $4,890.00 |
| 1,000 | $8.62 | $8,620.00 |
ATSAM4SD16BA-AU Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals such as timers, communication controllers, and analog blocks. The Cortex-M4 family from Arm is positioned in the hierarchy of 32-bit MCU cores (Cortex-M0 -> Cortex-M3 -> Cortex-M4 -> Cortex-M7) and adds DSP instructions and an optional FPU that accelerates signal-processing loops in motor control, audio, and sensor fusion.
Key features of the ATSAM4SD16BA-AU include up to 120 MHz core clock, 1MB Flash, 160KB SRAM, USB 2.0 Full-Speed with on-chip transceiver, CAN 2.0B controller, up to four USART/UART, three TWI (I2C) ports, two SPI interfaces, a 12-bit ADC up to 1 Msps, a 12-bit DAC, and a high-speed 16-bit timer/counter block. The peripheral DMA controller supports up to 16 channels, offloading data movement from the core.
Architecturally, the SAM4S uses a multi-layer bus matrix connecting the CPU, SRAM, Flash and peripherals so concurrent DMA and CPU accesses do not stall the core. The 1.8V core regulator is internal, and the device accepts a single 1.62V-3.6V supply on VDDIO, simplifying board design. The instruction cache masks Flash access latency, helping the core sustain the full 120 MHz Dhrystone throughput under interrupt-driven firmware loads.
Typical applications include industrial motor control (BLDC/PMSM), smart energy metering, building automation, USB-connected data loggers, HVAC controllers, and barcode scanners. The combination of CAN, USB and 12-bit analog suits automotive body and aftermarket ECUs as well as consumer appliances requiring safe firmware upgrades via USB.
Design considerations: place 100 nF decoupling capacitors on every VDD/VDDIO pin, add a 4.7 uF bulk capacitor close to the regulator input, and follow the SAM4S Hardware Design Considerations application note for crystal placement (load capacitor values must match the chosen 8-16 MHz crystal). NRST requires an external 10 kohm pull-up and the JTAG/SWD interface should be reserved for production programming.
This page synthesizes verified distributor pricing, drop-in alternatives inside the SAM4S/SAM3S family, and practical design notes that go beyond the manufacturer datasheet summary.
Drop-in alternatives for ATSAM4SD16BA-AU — 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 ATSAM4SD16BA-AU (same form factor and footprint) — differing in Package, Core, RoHS Status, Operating Temperature, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4SD16CA-AU
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →ATSAM4SA16BA-AUR
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →ATSAM4N16BA-AUR
✅ Drop-In✓ In Stock
$5.15 / Unit
View Datasheet →ATSAM3S4BA-AUR
✅ Drop-In✓ In Stock
$3.44 / Unit
View Datasheet →ATSAM4SD16BA-ANR
✅ Drop-In✓ In Stock
$5.92 / Unit
View Datasheet →STM32F407VGT6
✅ Drop-In✓ In Stock
$7.55 / Unit
View Datasheet →ATSAM4SD16BA-AU Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4F (32-bit) |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 1 MB (1M x 8) |
| SRAM | 160 KB |
| Instruction Cache | 2 KB |
| FPU | Single-precision (IEEE 754) |
| DSP Extensions | Yes (single-cycle MAC, SIMD) |
| Memory Protection Unit | Yes (MPU) |
| Supply Voltage (VDDIO) | 1.62 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (industrial) |
| Package | 64-pin LQFP (10x10 mm) |
| USB | USB 2.0 Full-Speed Device/Host with on-chip transceiver |
| CAN | 1 x CAN 2.0B |
| ADC | 12-bit, up to 1 Msps, 16 channels |
| DAC | 12-bit, 2 channels |
| Timers | TC x6, SysTick, RTC |
| Communication | USART x4, TWI (I2C) x3, SPI x2, HS-SPI x1 |
| DMA Channels | 16 |
| RoHS Status | Compliant |
| Pin-to-pin Compatibility | SAM3N, SAM3S (64/100-pin), SAM7S legacy |
ATSAM4SD16BA-AU Pin Configuration
| Pin 1 | PB0 — GPIO / peripheral function |
| Pin 2 | PB1 — GPIO / peripheral function |
| Pin 3 | PB2 — GPIO / peripheral function |
| Pin 4 | PB3 — GPIO / peripheral function |
| Pin 5 | VDDOUT — Internal 1.8V regulator output |
| Pin 6 | VDDIO — I/O supply voltage input |
| Pin 7 | VDDIN — Voltage regulator input |
| Pin 8 | GND — Ground |
| Pin 9 | XIN — Crystal oscillator input |
| Pin 10 | XOUT — Crystal oscillator output |
| Pin 11 | NRST — Reset input, active low |
| Pin 12 | TST — Test mode pin (tie to GND in application) |
| Pin 13 | PA0 — GPIO / peripheral function |
| Pin 14 | PA1 — GPIO / peripheral function |
| Pin 15 | PA2 — GPIO / peripheral function |
| Pin 16 | PA3 — GPIO / peripheral function |
| Pin 17 | PA4 — GPIO / peripheral function |
| Pin 18 | PA5 — GPIO / peripheral function |
| Pin 19 | PA6 — GPIO / peripheral function |
| Pin 20 | PA7 — GPIO / peripheral function |
| Pin 21 | PA8 — GPIO / peripheral function |
| Pin 22 | PA9 — GPIO / peripheral function |
| Pin 23 | PA10 — GPIO / peripheral function |
| Pin 24 | PA11 — GPIO / peripheral function |
| Pin 25 | PA12 — GPIO / peripheral function |
| Pin 26 | PA13 — GPIO / peripheral function |
| Pin 27 | PA14 — GPIO / peripheral function |
| Pin 28 | PA15 — GPIO / peripheral function |
| Pin 29 | PA16 — GPIO / peripheral function |
| Pin 30 | PA17 — GPIO / peripheral function |
| Pin 31 | PA18 — GPIO / peripheral function |
| Pin 32 | PA19 — GPIO / peripheral function |
| Pin 33 | PA20 — GPIO / peripheral function |
| Pin 34 | PA21 — GPIO / peripheral function |
| Pin 35 | PA22 — GPIO / peripheral function |
| Pin 36 | PA23 — GPIO / peripheral function |
| Pin 37 | PA24 — GPIO / peripheral function |
| Pin 38 | PA25 — GPIO / peripheral function |
| Pin 39 | PA26 — GPIO / peripheral function |
| Pin 40 | PA27 — GPIO / peripheral function |
| Pin 41 | PA28 — GPIO / peripheral function |
| Pin 42 | PA29 — GPIO / peripheral function |
| Pin 43 | PA30 — GPIO / peripheral function |
| Pin 44 | PA31 — GPIO / peripheral function |
| Pin 45 | PB4 — GPIO / peripheral function |
| Pin 46 | PB5 — GPIO / peripheral function |
| Pin 47 | PB6 — GPIO / peripheral function |
| Pin 48 | PB7 — GPIO / peripheral function |
| Pin 49 | PB8 — GPIO / peripheral function |
| Pin 50 | PB9 — GPIO / peripheral function |
| Pin 51 | PB10 — GPIO / peripheral function |
| Pin 52 | PB11 — GPIO / peripheral function |
| Pin 53 | PB12 — GPIO / peripheral function |
| Pin 54 | PB13 — GPIO / peripheral function |
| Pin 55 | GND — Ground |
| Pin 56 | VDDIO — I/O supply voltage input |
| Pin 57 | HSDM — USB High-Speed Data Minus (USB on-chip transceiver) |
| Pin 58 | HSDP — USB High-Speed Data Plus (USB on-chip transceiver) |
| Pin 59 | VBUS — USB VBUS sense input |
| Pin 60 | CANRX — CAN receive input |
| Pin 61 | CANTX — CAN transmit output |
| Pin 62 | ADVREF — ADC voltage reference |
| Pin 63 | GND — Ground |
| Pin 64 | VDDIO — I/O supply voltage input |
Typical Applications
ATSAM4SD16BA-AU is suitable for 6 applications: BLDC/PMSM Motor Control, Industrial USB Data Logger, Smart Energy Metering, Building Automation Controller, Automotive Aftermarket ECU, USB-Connected Barcode Scanner.
BLDC/PMSM Motor Control
The ATSAM4SD16BA-AU drives field-oriented control loops for BLDC and PMSM motors in industrial drives and appliances. Its Cortex-M4F core runs FOC math in single-precision floating point, the 1 Msps 12-bit ADC samples phase currents simultaneously through three channels, and the PWM timer block produces complementary 3-phase outputs with programmable dead-time and hardware fault input. Designers typically run the FOC loop at 10-20 kHz with the inner current loop fitting inside 50 microseconds, leaving CPU headroom for speed PI, sensor handling, and a USB diagnostic channel.
Recommended
Industrial USB Data Logger
With on-chip USB 2.0 Full-Speed and 1 MB Flash, the ATSAM4SD16BA-AU serves as a self-contained USB data logger for industrial sensors. The on-chip transceiver eliminates external PHY components, the 16-channel DMA offloads ADC stream-to-USB transfers, and the 160 KB SRAM buffers bursts before bulk endpoint commits. Combined with the RTC and the 12-bit ADC, the part can sample slow analog channels at kilohertz rates and present as a standard CDC or MSD device on the host.
Recommended
Smart Energy Metering
The Cortex-M4F core, 12-bit 1 Msps ADC, and RTC make the ATSAM4SD16BA-AU a fit for single-phase smart energy meters and sub-metering modules. The ADC samples shunt voltage and CT-derived current waveforms; DSP extensions accelerate the Goertzel-based harmonic analysis required by Class 1 accuracy standards. The 1 MB Flash holds a metering library, calibration tables, and a DLMS/COSEM or Modbus stack for AMI backhaul, while the 160 KB SRAM buffers instantaneous measurements.
Recommended
Building Automation Controller
In HVAC, lighting, and access control panels, the ATSAM4SD16BA-AU consolidates analog sensing, communications, and local UI on a single chip. CAN 2.0B connects to backbone HVAC controllers and VAV boxes, while three TWI buses drive sensor arrays and the SPI port drives a graphical OLED or segment LCD bridge. The 160 KB SRAM keeps a UI buffer plus a CAN mailbox, and the 1 MB Flash supports OTA firmware update through either the USB port or the CAN bootloader.
Recommended
Automotive Aftermarket ECU
The ATSAM4SD16BA-AU hosts CAN-based aftermarket automotive ECUs such as dash loggers, OBD-II dongles, and lighting controllers. CAN 2.0B at 1 Mbit/s handles the vehicle bus, USB bridges to a host laptop or smartphone, and the 12-bit ADC reads sensors such as fuel trim, MAP, or thermistors. Industrial temperature grade (-40 to +85 C) covers most cabin and engine-bay sensor locations for non-safety subsystems.
Recommended
USB-Connected Barcode Scanner
The combination of USB 2.0 Full-Speed, 120 MHz core, and 1 MB Flash supports handheld barcode scanners that present as USB HID Keyboard or USB CDC COM ports. The Cortex-M4F core processes 1D/2D decoder algorithms for typical image sensors, the DMA streams pixel data from an SPI-attached sensor, and the 12-bit DAC optionally drives an aiming laser or buzzer. The 160 KB SRAM buffers decoder work-in-progress between image frames.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SD16BA-AU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SD16CA-AU | ATSAM4SA16BA-AU | ATSAM4N16BA-AUR | ATSAM3S4BA-AU | STM32F407VGT6 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 100-LQFP (14x14) |
| Core | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4F @ 120 MHz | ARM Cortex-M4 @ 100 MHz | ARM Cortex-M3 @ 64 MHz | ARM Cortex-M4F @ 168 MHz |
| Flash | 1 MB | 512 KB | 1 MB | 1 MB | 256 KB | 1 MB |
| SRAM | 160 KB | 128 KB | 80 KB | 80 KB | 48 KB | 192 KB |
| USB | USB 2.0 Full-Speed (on-chip PHY) | USB 2.0 Full-Speed (on-chip PHY) | USB 2.0 Full-Speed (on-chip PHY) | USB 2.0 Full-Speed (on-chip PHY) | USB 2.0 Full-Speed (on-chip PHY) | USB 2.0 FS + USB 2.0 HS (OTG) |
| CAN | 1 x CAN 2.0B | 1 x CAN 2.0B | 0 | 0 | 1 x CAN 2.0B | 2 x CAN 2.0B |
| FPU | Yes (single-precision) | Yes (single-precision) | Yes (single-precision) | Yes (single-precision) | No | Yes (single-precision) |
| Operating Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.8 V to 3.6 V |
Key Differentiators
- Largest SRAM in the SAM4S 64-pin LQFP family (vs ATSAM4SA16BA-AU)
- On-chip HS USB transceiver included (vs ATSAM3S4BA-AU)
- Cortex-M4F with FPU and DSP extensions (vs STM32F407VGT6)
Design Notes
Place a 100 nF decoupling capacitor on every VDDIO pin and a 4.7 uF X5R bulk capacitor within 10 mm of the VDDIN pin. The internal 1.8V regulator output (VDDOUT) requires its own 1 uF + 100 nF local bypass. Decoupling loop area should be minimized by returning each decoupling capacitor to the nearest GND pin via a short, wide trace. Recommended: see the SAM4S Hardware Design Considerations application note for the recommended power tree and PCB footprint.
Route the XIN/XOUT traces as a guarded differential pair, keep them short and symmetric, and place the load capacitors close to the crystal case. The 64-pin LQFP has the crystal pins on pins 9-10; isolate this region from switching signal traces. Avoid routing USB D+/D- lines near oscillator or PWM traces to keep the on-chip HS USB transceiver within compliance margins.
Do not leave the TST pin floating in production - it must be tied directly to GND or to a debug connector with a controlled logic level. Floating TST can place the MCU in boundary-scan mode and prevent normal boot. The NRST pin requires an external 10 kohm pull-up to VDDIO and a 1 nF-100 nF reset capacitor; open-drain reset supervisors are preferred in noisy industrial environments.
Compliance Information
RoHS and REACH compliant per Microchip/Atmel product page. Industrial-grade (-40 to +85 C) but not AEC-Q100 qualified; for AEC-Q100 designs use SAM V71/V7x or SAM4E automotive variants.
