ATSAM4SA16BA-AUR - SAM4S Cortex-M4 MCU 1MB Flash 120MHz | Microchip
MPN: ATSAM4SA16BA-AUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.78 | $7.78 |
| 10 | $7.2 | $72.00 |
| 100 | $6.55 | $655.00 |
| 500 | $6 | $3,000.00 |
| 1,000 | $5.45 | $5,450.00 |
ATSAM4SA16BA-AUR Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as timers, communication interfaces, and analog blocks. The Cortex-M4 core in the SAM4S family adds DSP extensions and a single-precision FPU, making it suitable for signal-processing tasks that go beyond classical 8/16-bit MCU workloads.
Key features include 1 MB of single-bank Flash, 128 KB of SRAM, a 16-bit External Bus Interface (EBI), and a multi-channel Direct Memory Access (DMA) controller with linked-list descriptor support. The device also provides high-speed USB 2.0 Full-Speed with on-chip transceiver, CAN 2.0B controllers, up to 5 USART, 2 UART, 2 TWI (I2C), an HS SPI, plus a 12-bit ADC and a 12-bit DAC. A multi-layer bus matrix and distributed memory architecture enable high data-rate communication without starving the CPU.
Architecturally, the SAM4SA16B revision is pin-to-pin and software compatible with SAM3S Cortex-M3 parts, simplifying migration paths for designs needing more performance or memory. The SAM4S family uses an embedded Flash controller with prefetch buffer to keep execution deterministic at 120 MHz, while peripheral DMA channels offload block transfers from the core.
Typical applications include industrial control PLCs, factory automation HMIs, smart energy metering, building automation, USB peripherals and bridges, CAN-based automotive body/infotainment modules, and consumer audio/print subsystems. The combination of large Flash, USB, CAN, and a 12-bit ADC supports gateway and protocol-converter designs.
When designing with this part, note that the SAM4S line has been superseded in new designs by the SAM S70/SAM E70 Cortex-M7 families, but the SAM4S remains broadly available and supported for legacy migrations. Allow the dedicated VDDCORE pin to be driven only by the internal voltage regulator; do not supply it externally unless the application note explicitly requires bypass mode.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet, giving engineers an actionable procurement and design reference for the ATSAM4SA16BA-AUR.
Drop-in alternatives for ATSAM4SA16BA-AUR 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 ATSAM4SA16BA-AUR (same form factor and footprint) β differing in Package, USB, CAN, ADC, DAC.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAM4SA16BA-AU
β Drop-Inπ Reference alternative (not in catalog)
ATSAM4SA16CA-AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$6.23 / Unit
View Datasheet βATSAM4SA16BB-ANR
β Drop-Inβ In Stock
$5.49 / Unit
View Datasheet βATSAM4S16CA-CFN
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$2.98 / Unit
View Datasheet βATSAM4SD32CB-CFNR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAM4SA16BA-AUR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU (single-core) |
| CPU Architecture | 32-bit RISC |
| Maximum CPU Clock | 120 MHz |
| Program Memory (Flash) | 1 MB (1024 KB, 1M x 8) |
| Data Memory (SRAM) | 128 KB |
| Package | 64-LQFP (10x10 mm) |
| Operating Voltage (VDDIO) | 1.2 V / 3.3 V |
| Temperature Grade | Industrial (-40C to +85C) |
| Mounting Type | Surface Mount |
| Supply Packaging Form | Tape & Reel (AUR suffix) |
| Package Code (JEDEC) | LFQFP-64 |
| USB | USB 2.0 Full-Speed with on-chip transceiver |
| CAN | 2x CAN 2.0B controllers |
| ADC / DAC | 12-bit ADC, 12-bit DAC |
| RoHS Status | Compliant (Green, IND TEMPMRL) |
ATSAM4SA16BA-AUR lfqfp-64 Pin Configuration Guide
Pin configuration for ATSAM4SA16BA-AUR (lfqfp-64 package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAM4SA16BA-AUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4SA16BA-AUR is suitable for 6 applications: Industrial Control PLCs, USB Peripheral and Bridge Devices, CAN-Based Automotive Body Modules, Smart Energy Metering and Building Automation, Factory Automation HMI Terminals, Consumer Audio and Print Embedded Systems.
Industrial Control PLCs
The ATSAM4SA16BA-AUR is well suited for industrial PLC platforms because its 120 MHz Cortex-M4 with single-precision FPU executes PID loops and floating-point control math in under 1 microsecond per iteration. The 1 MB Flash holds IEC 61131-3 runtimes plus proprietary ladder-logic blocks, while 128 KB SRAM supports multi-axis motion queues without external memory. Two CAN 2.0B controllers plus USB Full-Speed with on-chip transceiver simplify fieldbus bridging to a host HMI, and the 12-bit ADC samples up to 16 analog inputs for thermocouple and 4-20 mA loop conditioning. Industrial temperature grade (-40C to +85C) and RoHS-compliant LQFP-64 meet harsh-floor cabinet requirements with reliable thermal margins.
Recommended
USB Peripheral and Bridge Devices
The on-chip USB 2.0 Full-Speed transceiver of the ATSAM4SA16BA-AUR eliminates the need for an external PHY, reducing BOM cost and PCB area in USB-to-UART, USB-to-SPI, or USB-to-CAN bridge products. The Cortex-M4 at 120 MHz runs USB CDC, HID, or vendor-class stacks with substantial headroom for application logic, while the dedicated DMA channels offload bulk endpoint transfers from the core. With 1 MB Flash available, dual-interface composite devices (e.g., CDC + MSD) fit comfortably without external storage. Operating from 3.3 V I/O simplifies integration with common USB connector protection circuits and ESD arrays used in commercial peripherals.
Recommended
CAN-Based Automotive Body Modules
Two on-chip CAN 2.0B controllers make the ATSAM4SA16BA-AUR a strong fit for body-electronics modules such as HVAC controllers, seat controllers, and lighting nodes that communicate over multi-drop CAN-FD-ready buses. The Cortex-M4 DSP extensions accelerate CAN message decoding and CRC verification, while 128 KB SRAM buffers incoming frames before protocol translation. The 12-bit ADC reads sensor inputs (temperature, position, current) at update rates compatible with body-control loops, and the 12-bit DAC generates analog outputs for LED dimming and motor-speed references. Industrial temperature grade covers most cabin applications; for under-hood deployments consider an AEC-Q100-qualified part.
Recommended
Smart Energy Metering and Building Automation
The ATSAM4SA16BA-AUR integrates metering-class peripherals - 12-bit ADC with up to 16 channels, 12-bit DAC for analog front-end calibration, and 128 KB SRAM - into a single 64-LQFP for residential single-phase and three-phase energy meters. Its Cortex-M4 core computes RMS power, harmonic analysis (up to ~15th harmonic), and reactive-power metering in real time using DSP extensions. USB Full-Speed enables local configuration via utility technician tools, and CAN 2.0B connects to building-automation backbones like BACnet or KNX gateways. The 1 MB Flash accommodates full DLMS/COSEM or Modbus stacks alongside application firmware, eliminating external memory cost.
Recommended
Factory Automation HMI Terminals
Operator-interface HMI terminals benefit from the ATSAM4SA16BA-AUR's combination of 1 MB Flash (large enough to embed graphical assets and localized strings), 128 KB SRAM (framebuffer for small TFTs), and 12-bit ADC for touch-screen or rotary-encoder inputs. The USB Full-Speed port serves both device-mode firmware updates and host-mode barcode-scanner integration, while the SPI and TWI (I2C) peripherals drive TFT displays and EEPROM storage. Industrial temperature grade and robust LQFP-64 packaging withstand factory-floor vibration and thermal stress typical of control cabinets.
Recommended
Consumer Audio and Print Embedded Systems
Consumer audio streamers, MIDI controllers, and label printers leverage the ATSAM4SA16BA-AUR's Cortex-M4 DSP engine to handle sample-rate conversion, audio effects, or image decoding without an external DSP. The 12-bit DAC outputs audio reference voltages, the 12-bit ADC reads analog control inputs, and USB Full-Speed with on-chip transceiver connects to host PCs. 1 MB Flash holds audio clips, fonts, and protocol stacks, while 128 KB SRAM provides temporary buffer space for streaming audio or print-job rasterization. The LQFP-64 footprint is easy to hand-solder for prototype builds and reduces assembly cost at scale.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SA16BA-AUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SA16BA-AU | ATSAM4SA16CA-AUR | ATSAM4S16CA-CFN | ATSAM4SD32CB-CFNR | STM32F407VGT6 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP - same | 64-LQFP - same | 100-LQFP (14x14 mm) - different |
| Core | ARM Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 without FPU | Cortex-M4 with FPU | Cortex-M4 with FPU |
| Maximum Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 168 MHz |
| Flash Memory | 1 MB | 1 MB | 1 MB | 1 MB | 2 MB (+100%) | 1 MB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 160 KB (+25%) | 192 KB (+50%) |
| Shipping Form | Tape & Reel | Tray | Tape & Reel | Tray | Tape & Reel | Tray |
| FPU / DSP Extensions | Yes (single-precision FPU + DSP) | Yes | Yes | No FPU (DSP only) | Yes | Yes |
| USB Interface | USB 2.0 Full-Speed with on-chip PHY | USB FS on-chip PHY | USB FS on-chip PHY | USB FS on-chip PHY | USB FS on-chip PHY | USB FS + USB HS with external PHY |
Key Differentiators
- On-chip USB Full-Speed PHY in 64-LQFP (vs ATSAM4S16CA-CFN)
- Dual CAN 2.0B controllers with dedicated DMA (vs ATSAM4SD32CB-CFNR)
- Industrial-grade qualification with -AUR Tape & Reel shipping (vs STM32F407VGT6)
Design Notes
The ATSAM4SA16BA-AUR requires both a 3.3 V VDDIO rail and a 1.2 V VDDCORE supply. In default mode, the internal voltage regulator generates VDDCORE from VDDIO; bypass with a 1 uF + 10 nF ceramic pair on the VDDCORE pin. If your application forces bypass mode (e.g., for lower power consumption in sleep), supply VDDCORE externally at 1.2 V from a low-noise LDO and disable the internal regulator per the SAM4S datasheet chapter 'Power Considerations'.
Place the decoupling capacitors (100 nF + 10 uF bulk) within 5 mm of each VDDIO pin and route a short, low-impedance ground return to the exposed pad. The LQFP-64 package has no thermal pad, so a continuous ground pour on the top layer under the part helps with thermal dissipation. Keep the 32 kHz crystal traces short and symmetric, and guard them with a ground ring to minimize clock-noise injection into adjacent analog pins.
Do not assume SAM4S is drop-in compatible with the newer SAME70/SAMS70 families - peripheral register layouts differ. Watch the JTAG/SWD pin mapping: on the LQFP-64, the SWDIO and SWCLK pins share functions with certain GPIOs, so disabling the JTAG boundary scan via the MCU fuses is often required before deploying production firmware. Also note that the SAM4S revision-A silicon (ATSAM4SA16BA-AUR) is revision B per Microchip's later device naming; consult the errata document before locking in hardware.
Compliance Information
RoHS-compliant and lead-free per DigiKey listing (Green, IND TEMPMRL marking). Industrial temperature grade; not AEC-Q100 qualified - choose ATSAM4SA16CA-AUR automotive grade variants for AEC-Q100 applications. Conflict-minerals compliance per Microchip corporate policy.
