ATSAM4SD16BA-ANR - 1MB Flash Cortex-M4 MCU 120MHz | Microchip
MPN: ATSAM4SD16BA-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.45 | $10.45 |
| 10 | $9.41 | $94.10 |
| 100 | $8.32 | $832.00 |
| 500 | $7.45 | $3,725.00 |
| 1,000 | $6.58 | $6,580.00 |
| 3,000 | $5.92 | $17,760.00 |
ATSAM4SD16BA-ANR Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program and data memory, and a wide range of peripherals such as timers, communication controllers, ADCs, and GPIOs. The ATSAM4SD16BA belongs to the Cortex-M4 family (Cortex-M -> ARM -> 32-bit RISC core -> embedded MCU), giving engineers an industry-standard programming model, deterministic interrupt handling, and a broad ecosystem of CMSIS-compliant tools, RTOS ports, and middleware.
Key features include a Cortex-M4 core with single-precision FPU and DSP extensions, 1 MB dual-bank Flash supporting in-application programming, 128 KB SRAM with backup SRAM, a 16-bit external bus interface (EBI) for SRAM/SDRAM/NOR/NAND expansion, and a peripheral set that includes up to 6 USART/UART, 2 UART, 3 TWI (I2C-compatible), 2 SPI, one high-speed USB 2.0 full-speed device/host/OTG port, one HS SD/MMC interface, a 12-bit ADC up to 1 Msps, a 12-bit DAC, and multiple 16-bit timers plus an RTC. The on-chip voltage regulator and brown-out detector support a single 1.62 V to 3.6 V supply.
Architecturally, the SAM4S uses a multi-layer AHB bus matrix with distributed SRAM and a 4-channel DMA, allowing sustained data movement between peripherals, memory and CPU without bandwidth bottlenecks. Code is executed at up to 120 MHz (1.25 DMIPS/MHz), and the FPU enables floating-point signal processing in audio, motor control, and sensor-fusion algorithms without resorting to soft-float libraries.
Typical applications include industrial motor drives and PLCs, building-automation and smart-energy concentrators, smart-grid and metering front-ends, barcode scanners, point-of-sale terminals, medical monitoring peripherals, and USB-enabled human-interface devices. The large 1 MB Flash also makes the part attractive as a single-chip gateway for Sub-GHz or Wi-Fi host MCUs in low-cost IoT nodes.
When designing with this MCU, ensure the 64-pin LQFP variant's pinout and supply-rail decoupling match your PCB layout, plan the Flash bank-erase/lock-bit strategy early, and reserve a JTAG/SWD header for firmware bring-up.
This page synthesizes distributor pricing, drop-in SAM4S-family alternatives, and practical design notes that go beyond the manufacturer datasheet to speed up selection.
Drop-in alternatives for ATSAM4SD16BA-ANR — 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-ANR (same form factor and footprint) — differing in Package, ADC, USB, CAN, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4SA16CB-ANR
✅ Drop-In✓ In Stock
$7.05 / Unit
View Datasheet →ATSAM4SA16CB-AN
✅ Drop-In✓ In Stock
$5.95 / Unit
View Datasheet →ATSAM4SA16CA-AUR
✅ Drop-In✓ In Stock
$6.23 / Unit
View Datasheet →ATSAM4SA16CA-ANR
✅ Drop-In✓ In Stock
$5.38 / Unit
View Datasheet →ATSAM4SA16BB-ANR
✅ Drop-In✓ In Stock
$5.49 / Unit
View Datasheet →ATSAM4SA16BA-AUR
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →ATSAM4SD16BA-ANR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU and DSP extensions |
| Maximum Clock Frequency | 120 MHz |
| Core Mark Performance | 1.25 DMIPS/MHz (Dhrystone 2.1) |
| Flash Memory | 1024 KB (dual-bank, in-application programmable) |
| SRAM | 128 KB (plus 16 KB backup SRAM) |
| Supply Voltage (VDDIO/VDDCORE) | 1.62 V to 3.6 V |
| Package | 64-LQFP, 10 x 10 mm, 0.5 mm pitch (AN suffix) |
| I/O Pins | Up to 47 GPIO |
| ADC | 12-bit, up to 1 Msps, 16 channels |
| DAC | 12-bit, 2 channels |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| SD/MMC | 1 x High-Speed SD/MMC/SDIO |
| USART/UART | 6 x USART + 2 x UART |
| SPI | 2 x SPI (one with extended FIFO) |
| TWI (I2C-compatible) | 3 x TWI |
| External Bus Interface | 16-bit EBI (SRAM/SDRAM/NOR/NAND) |
| Timers | 3 x 16-bit TC + 1 x 16-bit RTT + 1 x RTC |
| Operating Temperature | -40 C to +105 C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ATSAM4SD16BA-ANR Pin Configuration
| Pin 1 | PA17 — GPIO / peripheral I/O line A17 (multiple alternate functions) |
| Pin 2 | PA18 — GPIO / peripheral I/O line A18 |
| Pin 3 | PA19 — GPIO / peripheral I/O line A19 |
| Pin 4 | PA20 — GPIO / peripheral I/O line A20 |
| Pin 5 | VDDOUT — Voltage regulator output (1.2 V core supply decoupling) |
| Pin 6 | VDP — USB D+ line (USB 2.0 FS data) |
| Pin 7 | VDM — USB D- line (USB 2.0 FS data) |
| Pin 8 | VDDIO — I/O supply voltage input (1.62 V to 3.6 V) |
| Pin 9 | PA21 — GPIO / peripheral I/O line A21 |
| Pin 10 | PA22 — GPIO / peripheral I/O line A22 |
| Pin 11 | PA23 — GPIO / peripheral I/O line A23 |
| Pin 12 | PA24 — GPIO / peripheral I/O line A24 |
| Pin 13 | PA25 — GPIO / peripheral I/O line A25 |
| Pin 14 | PA26 — GPIO / peripheral I/O line A26 |
| Pin 15 | PA27 — GPIO / peripheral I/O line A27 |
| Pin 16 | PA28 — GPIO / peripheral I/O line A28 |
| Pin 17 | PA29 — GPIO / peripheral I/O line A29 |
| Pin 18 | PA30 — GPIO / peripheral I/O line A30 |
| Pin 19 | PA31 — GPIO / peripheral I/O line A31 |
| Pin 20 | PB0 — GPIO / peripheral I/O line B0 |
| Pin 21 | PB1 — GPIO / peripheral I/O line B1 |
| Pin 22 | PB2 — GPIO / peripheral I/O line B2 |
| Pin 23 | PB3 — GPIO / peripheral I/O line B3 |
| Pin 24 | PB4 — GPIO / peripheral I/O line B4 |
| Pin 25 | PB5 — GPIO / peripheral I/O line B5 |
| Pin 26 | PB6 — GPIO / peripheral I/O line B6 |
| Pin 27 | PB7 — GPIO / peripheral I/O line B7 |
| Pin 28 | PB8 — GPIO / peripheral I/O line B8 |
| Pin 29 | PB9 — GPIO / peripheral I/O line B9 |
| Pin 30 | PB10 — GPIO / peripheral I/O line B10 |
| Pin 31 | PB11 — GPIO / peripheral I/O line B11 |
| Pin 32 | PB12 — GPIO / peripheral I/O line B12 |
| Pin 33 | PB13 — GPIO / peripheral I/O line B13 |
| Pin 34 | PB14 — GPIO / peripheral I/O line B14 |
| Pin 35 | PB15 — GPIO / peripheral I/O line B15 |
| Pin 36 | VDDCORE — Core supply voltage input (1.2 V regulated) |
| Pin 37 | GND — Ground |
| Pin 38 | PC0 — GPIO / peripheral I/O line C0 |
| Pin 39 | PC1 — GPIO / peripheral I/O line C1 |
| Pin 40 | PC2 — GPIO / peripheral I/O line C2 |
| Pin 41 | PC3 — GPIO / peripheral I/O line C3 |
| Pin 42 | PC4 — GPIO / peripheral I/O line C4 |
| Pin 43 | PC5 — GPIO / peripheral I/O line C5 |
| Pin 44 | PC6 — GPIO / peripheral I/O line C6 |
| Pin 45 | PC7 — GPIO / peripheral I/O line C7 |
| Pin 46 | PC8 — GPIO / peripheral I/O line C8 |
| Pin 47 | PC9 — GPIO / peripheral I/O line C9 |
| Pin 48 | PC10 — GPIO / peripheral I/O line C10 |
| Pin 49 | PC11 — GPIO / peripheral I/O line C11 |
| Pin 50 | PC12 — GPIO / peripheral I/O line C12 |
| Pin 51 | PC13 — GPIO / peripheral I/O line C13 |
| Pin 52 | PC14 — GPIO / peripheral I/O line C14 |
| Pin 53 | PC15 — GPIO / peripheral I/O line C15 |
| Pin 54 | PC16 — GPIO / peripheral I/O line C16 |
| Pin 55 | PC17 — GPIO / peripheral I/O line C17 |
| Pin 56 | PC18 — GPIO / peripheral I/O line C18 |
| Pin 57 | PC19 — GPIO / peripheral I/O line C19 |
| Pin 58 | PC20 — GPIO / peripheral I/O line C20 |
| Pin 59 | PC21 — GPIO / peripheral I/O line C21 |
| Pin 60 | PC22 — GPIO / peripheral I/O line C22 |
| Pin 61 | PC23 — GPIO / peripheral I/O line C23 |
| Pin 62 | NRST — Active-low reset input |
| Pin 63 | TST — Test mode pin (must be tied low in normal operation) |
| Pin 64 | GND — Ground |
Typical Applications
ATSAM4SD16BA-ANR is suitable for 8 applications: Industrial Motor Control, Smart Energy and Metering, Building Automation and HVAC, USB Human-Interface Devices, Point-of-Sale Terminals, Medical Monitoring Peripherals, IoT Gateway and Protocol Bridge, Industrial Control HMI.
Industrial Motor Control
The ATSAM4SD16BA-ANR's 120 MHz Cortex-M4 with single-precision FPU and DSP extensions executes field-oriented control (FOC) loops in 5 to 10 us, while its 12-bit 1 Msps ADC simultaneously samples three phase currents and DC-bus voltage with deterministic latency. The 1 MB dual-bank Flash allows in-application firmware updates without halting the drive, which is critical for installed-base equipment. Six USART/UART channels enable RS-485/Modbus, CAN via external controller, and isolated comms to a PLC, while 6 PWM-capable timers synchronize three-phase complementary outputs with hardware dead-time insertion.
Recommended
Smart Energy and Metering
The ATSAM4SD16BA-ANR fits smart-meter and concentrator designs where large code storage for metering stacks, security libraries, and DLMS/COSEM communication is required. The Cortex-M4 FPU accelerates real-time RMS, harmonic, and FFT calculations for power-quality analysis at 4 kHz sampling rates. The 12-bit ADC, combined with the integrated RTC and tamper-detection pins, supports metrology front-ends, while the high-speed SD/MMC and USB OTG interfaces simplify local firmware updates and DLMS sessions via handheld readers.
Recommended
Building Automation and HVAC
The ATSAM4SD16BA-ANR's 1 MB Flash is well-suited to BACnet, Modbus, and KNX stack implementations on a single chip, eliminating an external host processor. Three TWI (I2C-compatible) buses drive sensor front-ends (temperature, CO2, occupancy), while six USART channels connect to RS-485 trunks and isolated EIA-485 transceivers. The 64-LQFP package exposes up to 47 GPIOs, which comfortably supports 4.3-inch TFT display interfaces plus capacitive touch controllers and expansion headers for HVAC actuator cards.
Recommended
USB Human-Interface Devices
With an integrated USB 2.0 Full-Speed Device/Host/OTG controller and PHY, the ATSAM4SD16BA-ANR is ideal for barcode scanners, programmable keypads, and industrial HIDs. The Cortex-M4 core parses USB HID, CDC, and vendor-class stacks in 1 MB of Flash, while the FPU accelerates custom image-processing or scan-decode algorithms. The 12-bit DAC and PWM timers drive beeper and LED indicator channels, and three TWI ports let designers add capacitive touch and display I/O without an external bridge.
Recommended
Point-of-Sale Terminals
The ATSAM4SD16BA-ANR's combination of Cortex-M4 performance, 1 MB Flash, USB OTG, and SD/MMC makes it a strong host for compact POS terminals integrating card readers, NFC peripherals, and thermal printers. Six USART channels connect to printer modules and secure PIN pads, while the EBI provides a parallel interface to a TFT display and external SRAM buffer. The industrial -40 C to +105 C temperature grade supports outdoor and kitchen-display deployments without thermal derating.
Recommended
Medical Monitoring Peripherals
The ATSAM4SD16BA-ANR's Cortex-M4 DSP extensions accelerate pulse-oximetry, ECG filtering, and respiration-rate algorithms while the FPU simplifies sensor-fusion math for wearable patches. The 12-bit 1 Msps ADC acquires photoplethysmography (PPG) and bio-impedance channels simultaneously, and the 128 KB SRAM retains sample buffers and small ML inference models. Three TWI buses interface to SpO2 sensors, temperature ICs, and EEPROM for patient-data logging.
Recommended
IoT Gateway and Protocol Bridge
The ATSAM4SD16BA-ANR pairs naturally with Sub-GHz or Wi-Fi host modules as a local protocol bridge, translating Modbus RTU, BACnet, or DMX into MQTT or HTTP. Six USART channels and two SPIs allow multiple radios to attach concurrently, while 1 MB Flash stores TLS stacks, JSON parsers, and OTA bootloaders. The integrated USB OTG port provides a fallback local-config interface when the network is down, and the RTC with backup SRAM enables reliable time-stamped event logging.
Recommended
Industrial Control HMI
The ATSAM4SD16BA-ANR drives small TFT or character LCDs through the 16-bit EBI, while the Cortex-M4 FPU renders icons, gauges, and trend graphs from a 1 MB firmware budget that can include full LVGL or emWin stacks. Three TWI channels attach capacitive touch controllers and I/O expanders, and the 12-bit ADC reads analog potentiometers and 4-20 mA front-ends. Six USART channels handle RS-485 master/slave connections to PLCs, inverters, and remote I/O blocks.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SD16BA-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SA16CB-ANR | ATSAM4SA16CB-AN | ATSAM4SA16CA-AUR | ATSAM4SA16CA-ANR | ATSAM4SA16BB-ANR | ATSAM4SA16BA-AUR |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) |
| Core | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU (Rev B) | Cortex-M4 with FPU (Rev B) |
| Maximum Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash Memory | 1024 KB | 1024 KB | 1024 KB | 1024 KB | 1024 KB | 1024 KB (Rev B) | 1024 KB (Rev B) |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| Supply 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 | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Silicon Revision | Revision B | Revision A | Revision A | Revision A | Revision A | Revision B | Revision B |
Key Differentiators
- Dual-bank 1 MB Flash with in-application programming (vs ATSAM4S8CA-CFU)
- Revision B silicon with enhanced peripheral set (vs ATSAM4SA16CB-ANR (Rev A silicon))
- Industrial -40 C to +105 C temperature grade in tape-and-reel (vs ATSAM4SA16CB-AN (tray packing))
Design Notes
The ATSAM4SD16BA-ANR integrates a 1.2 V core LDO with external decoupling requirements. Place a 1 uF X7R ceramic capacitor close to VDDOUT pin and a 4.7 uF bulk capacitor on VDDIO; additional 100 nF decoupling at every VDDIO pin is required to suppress switching noise from the USB and EBI peripherals. Power-rail sequencing is not required because the on-chip regulator handles core start-up, but keep NRST low until VDDIO is stable.
At industrial -40 C to +105 C ambient operation, the 64-LQFP package thermal resistance theta_JA is approximately 50 C/W on a standard 2s2p JEDEC test board. For designs running the Cortex-M4 core continuously at 120 MHz with all peripherals active, plan for up to 400 mW internal dissipation and ensure adequate copper pour (at least 1 square inch top-side) plus thermal vias to inner planes to keep the junction below 125 C.
Route the USB DP/DM pair as a 90-ohm differential with length matching to within 150 mil, and place the ESD protection array within 3 mm of the connector. Keep the 12 MHz crystal traces short and symmetric with the load capacitors grounded to a clean GND island. Avoid routing the EBI data bus across the analog ADC traces to minimize digital-to-analog crosstalk.
The TST pin must be tied to GND in normal operation; leaving it floating can lock the device in test mode. Configure unused pins as inputs with enabled pull-ups rather than floating to reduce supply current noise. When using the USB HS port, the VBUS sensing pin requires an internal pull-up configuration to be enabled in software before cable attach.
For SD/MMC interfaces operating above 25 MHz, place a 33 ohm series-termination resistor at the SAM4S SDCK clock output and keep total SD card bus length under 50 mm to stay within SD spec timing. For SPI peripherals exceeding 25 MHz, add source-series termination at the SAM4S SPCK output and verify signal integrity with TDR measurements if the bus exceeds 75 mm.
Compliance Information
RoHS and REACH compliant per Microchip product declaration; AEC-Q100 not claimed - automotive designs should consult Microchip's SAM V71/V70 automotive MCU family. Industrial -40C to +105C temperature grade.
