ATSAM4S16BA-AN - 120MHz Cortex-M4, 1MB Flash MCU | Microchip
MPN: ATSAM4S16BA-AN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.62 | $76.20 |
| 100 | $6.88 | $688.00 |
| 500 | $6.35 | $3,175.00 |
| 1,000 | $5.9 | $5,900.00 |
ATSAM4S16BA-AN Overview
A microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals into one package, sitting at the device level of the embedded-systems hierarchy below system-on-chip and above discrete logic. The SAM4S family belongs to Microchip's ARM-based SAM portfolio, using the 32-bit ARM Cortex-M4 RISC processor with DSP instructions and a Thumb-2 instruction set, plus a Memory Protection Unit (MPU) for robust software partitioning.
Key features include a 1.62 V to 3.6 V operating supply, 1 MB of ECC-protected dual-bank Flash with Security Bit and lock regions, and rich connectivity: I2C, SPI, UART/USART, SSC (I2S), IrDA, memory-card interfaces, and USB. Peripheral set covers DMA, PWM, watchdog timer, brown-out detect/reset, and power-on reset, enabling compact single-chip designs.
Architecture highlights include the Cortex-M4 DSP extension set for single-cycle MAC operations, fast Flash with prefetch for zero-wait-state execution at lower frequencies, and efficient power consumption of roughly 200 uA/MHz as published on the Microchip SAM4S16 product page. The dual-bank Flash architecture supports safe in-application programming and firmware update schemes.
Typical applications include industrial control and automation nodes, consumer and portable devices, motor control with PWM peripherals, and USB-connected instrumentation. The 47 I/O count and 64-LQFP footprint suit compact, moderately pin-count-limited boards.
Design consideration: keep decoupling capacitors close to all VDD/VDDIO pins and respect the 1.62 V to 3.6 V I/O range; the plastic LQFP 10 x 10 body needs no heatsink but benefits from solid ground pours.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing tiers, verified drop-in alternatives, and practical design notes in one place.
Drop-in alternatives for ATSAM4S16BA-AN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4S16BA-AU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAM4S8BA-AN
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.1 / Unit
View Datasheet →ATSAM4S4BA-AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM3S8BA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$6.4 / Unit
View Datasheet →ATSAM3N4BA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →ATSAM4S16BA-AN Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-bit |
| Maximum Clock Speed | 120 MHz |
| Flash Memory | 1 MB (1M x 8), dual-bank with ECC |
| SRAM | 128 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Number of I/O | 47 |
| Connectivity | I2C, SPI, UART/USART, SSC, IrDA, USB, memory card |
| Peripherals | DMA, PWM, WDT, brown-out detect/reset, POR |
| Instruction Set | Thumb-2 with DSP instructions |
| Memory Protection | MPU (Memory Protection Unit) |
| Flash Security | Security Bit and lock regions |
| Package | 64-LQFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Power Consumption | Approx. 200 uA/MHz (per Microchip product page) |
| Series | SAM4S |
| Part Status | Active |
ATSAM4S16BA-AN 64-lqfp (10 x 10 mm) Pin Configuration Guide
Pin configuration for ATSAM4S16BA-AN (64-lqfp (10 x 10 mm) 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 ATSAM4S16BA-AN.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4S16BA-AN is suitable for 6 applications: Industrial Control and Automation, USB-Connected Instruments and Data Loggers, Motor Control and Power Conversion, Portable and Battery-Powered Devices, Building Automation and Smart Sensors, Consumer and Audio Accessories.
Industrial Control and Automation
The ATSAM4S16BA-AN fits industrial control nodes where deterministic 120 MHz execution, 1 MB of code space for protocol stacks, and robust peripherals are required. Its PWM channels drive motor or heater control loops, while the 12-channel DMA offloads UART, SPI, and I2C traffic so the Cortex-M4 core focuses on the control algorithm. Dual-bank Flash with ECC allows field firmware updates with a safe fallback bank, reducing service costs on deployed equipment. Operating from a 3.3 V rail with 47 GPIO and brown-out reset, it integrates sensor interfacing, HMI, and actuator control into one chip. According to the Microchip SAM4S datasheet, watchdog and clock-failure protection features support the reliability expectations of factory-floor equipment.
Recommended
USB-Connected Instruments and Data Loggers
With its integrated USB peripheral and 1 MB Flash, the ATSAM4S16BA-AN is well suited to bench instruments, data loggers, and USB dongles. The DMA controller streams ADC or sensor data to a USB buffer with minimal CPU intervention, while 128 KB SRAM provides ample dual-buffering headroom. The dual-bank Flash enables USB DFU firmware updates in the field - the device can run from one bank while the other is reprogrammed, guaranteeing recovery if an update fails. SSC and I2S support audio-class devices, and the 120 MHz core with DSP instructions handles filtering and FFT analysis locally before transmitting reduced results upstream over USB.
Recommended
Motor Control and Power Conversion
The SAM4S peripheral set targets motor control: PWM channels with fault inputs, a general-purpose timer ecosystem, and the Cortex-M4 DSP extension for FOC (field-oriented control) arithmetic. The ATSAM4S16BA-AN executes Park/Clarke transforms and PI loops efficiently at 120 MHz using single-cycle MAC operations, while hardware divide accelerates scaling math. Brown-out detection and watchdog supervision protect power stages during supply transients. The 1 MB Flash stores multiple control profiles or parameter tables for multi-product platforms sharing one PCB. Because PWM outputs are multiplexed on standard GPIO within the 47-I/O budget, gate-driver or pre-driver interfaces connect without external logic in typical single- or dual-motor designs.
Recommended
Portable and Battery-Powered Devices
Microchip's published figure of approximately 200 uA/MHz makes the ATSAM4S16BA-AN attractive for battery-powered products that still need DSP-class compute. Sleep and wait modes with wake-on-interrupt allow duty-cycled acquisition: the core sleeps between sensor events, wakes on a peripheral interrupt, processes at full speed, and returns to low power. The 1.62 V to 3.6 V supply range permits direct operation from a lithium cell through a simple LDO across the discharge curve. Integrated memory-card connectivity supports local data storage for loggers and handheld instruments, while the 64-LQFP 10 x 10 mm body keeps the PCB compact enough for handheld enclosures.
Recommended
Building Automation and Smart Sensors
Smart sensors and building-automation nodes benefit from the ATSAM4S16BA-AN's combination of I2C/SPI sensor buses, UART-based RS-485 field buses, and sufficient Flash for protocol stacks such as Modbus. The 47 GPIO accommodate switches, LEDs, and relays directly, reducing component count. The ECC-protected dual-bank Flash maintains data integrity across brown-out events common in large buildings, and the Security Bit blocks code extraction when intellectual property is embedded. With the watchdog and clock supervision, nodes recover autonomously from bus faults. The 120 MHz headroom also allows running lightweight edge analytics - threshold detection, filtering, or simple classification - before transmitting events upstream.
Recommended
Consumer and Audio Accessories
For consumer electronics, the ATSAM4S16BA-AN provides USB connectivity, I2S/SSC audio interfacing, and enough processing power for DSP effects, voice prompts, or active noise control in headphones and accessories. The Cortex-M4 DSP instructions process audio streams in real time at 120 MHz, while 1 MB Flash holds effect libraries, menus, and USB descriptors with room for product variants on one firmware platform. PWM supports LED indicators and haptic feedback control. The 10 x 10 mm LQFP suits space-constrained wearable and accessory layouts, and tray packaging ('AN' suffix) supports both hand assembly of prototypes and standard SMT placement in production.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4S16BA-AN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S16BA-AU | ATSAM4S8BA-AN | ATSAM4S4BA-AU | ATSAM3S8BA-AU |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4 with DSP | ARM Cortex-M4 with DSP | ARM Cortex-M4 with DSP | ARM Cortex-M4 with DSP | ARM Cortex-M3 (no DSP) |
| Max Clock Speed | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 96 MHz |
| Flash Memory | 1 MB (dual-bank, ECC) | 1 MB (dual-bank, ECC) | 512 KB | 256 KB | 512 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 64 KB | 128 KB |
| GPIO Count | 47 | 47 | 47 | 47 | 47 |
| USB | Yes (device) | Yes (device) | Yes (device) | Yes (device) | Yes (device) |
| 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 |
Key Differentiators
- Largest Flash in the 64-pin SAM4S family (vs ATSAM4S8BA-AN)
- Cortex-M4 DSP instructions at 120 MHz (vs ATSAM3S8BA-AU)
- Double the SRAM of entry SAM4S variant (vs ATSAM4S4BA-AU)
- Honest trade-off: higher unit cost than smaller variants (vs ATSAM4S4BA-AU)
Design Notes
The SAM4S uses separate supply domains: VDDCORE/VDD (1.62-3.6 V domain depending on rail configuration) and VDDIO for the I/O banks. Follow the datasheet power scheme exactly - the internal regulator requires the recommended decoupling network, and all VDD pins of each domain must be tied together on the PCB with one 100 nF capacitor per pin plus bulk capacitance at the board entry. Per the Microchip SAM4S datasheet, correct sequencing and decoupling are prerequisites for stable 120 MHz operation.
Use a solid ground plane under the 64-LQFP and place the 100 nF decoupling capacitors within 2 mm of their associated supply pins, with vias directly to the ground plane to minimize loop inductance. Keep the crystal (if used) within 5 mm of the XIN/XOUT pins with guard rings and ground pour to reduce jitter. Route USB D+/D- as a 90-ohm differential pair with length matching if the USB peripheral is used. These are standard Microchip layout practices described in the SAM4S family documentation.
When migrating between SAM4S densities (e.g., ATSAM4S16BA to ATSAM4S8BA), update the linker script Flash/SRAM boundaries - code compiled for 1 MB will silently fail to fit 512 KB only at link time, so reserve at least 25% memory headroom in designs intended to span densities. Also remember the Security Bit is irreversible: enabling it locks debug access permanently. Finally, GPIO multiplexing means a pin's peripheral function must be assigned in the PIO controller before the peripheral expects signals - check the per-pin multiplexing table in the datasheet.
Estimated: a 120 MHz Cortex-M4 at roughly 200 uA/MHz from the Microchip product page implies approximately 24 mA of core-related current, or about 79 mW at 3.3 V - modest for the 10 x 10 mm LQFP. Thermal management is generally unnecessary; a standard ground pour provides adequate heat spreading. Verify with your measured application current profile, since active peripheral loads (USB, PWM drivers) dominate over the core baseline.
Compliance Information
Mouser listing references 'LQFPGREENEXT' green packaging; DigiKey listing implies standard RoHS/lead-free commercial MCU status. Formal REACH, halogen-free, and conflict-minerals declarations should be requested from Microchip environmental documentation for the specific date code.
