ATSAM4SA16BA-ANR - SAM4S 1MB Flash Cortex-M4 MCU 64-LQFP | Microchip
MPN: ATSAM4SA16BA-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.2 | $62.00 |
| 100 | $5.45 | $545.00 |
| 500 | $4.82 | $2,410.00 |
| 1,000 | $4.2 | $4,200.00 |
ATSAM4SA16BA-ANR 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 into one IC. The Cortex-M4 core specifically adds a single-precision floating-point unit (FPU) and DSP extensions, making the ATSAM4SA16B well-suited to digital signal processing, motor control, and sensor-fusion applications where integer-only cores fall short. Positioned at the MCU -> embedded processor -> semiconductor level of the taxonomy, the SAM4S series targets mainstream industrial and consumer designs.
Key features include 1MB (1M x 8) of embedded Flash, 128KB SRAM, a 16-channel Event System, two 16-bit timers plus a 32-bit RTC, and an extensive peripheral set including USB 2.0 Full-Speed, CAN, two I2C, four UART/USART, three SPI, and a 12-bit ADC. An integrated FPU and DSP instruction set accelerate ARM Cortex-M4 workloads, and the part is pin-to-pin compatible with Microchip's SAM7S, SAM3N, and SAM3S series - enabling migration paths from legacy designs.
The SAM4S architecture uses a multi-layer bus matrix to allow simultaneous Flash access, peripheral DMA, and USB traffic without bus contention. Integrated voltage regulators and brown-out detection simplify external power design, while the 12-bit ADC and analog comparator support sensor interfaces. The part is supported by Atmel Studio and the Atmel Software Framework (ASF), accelerating firmware development.
Typical applications include industrial PLC modules, USB-enabled barcode scanners, smart energy meters, building-automation gateways, motor-control boards, and medical handheld instruments. The Cortex-M4 + FPU combination also suits audio processing, small-format DSP filters, and protocol bridges.
When designing with this device, ensure your PCB layout provides adequate decoupling (typically 100nF + 4.7uF per VDD pin), keep the 12 MHz crystal traces short, and program the brown-out reset level to match your battery discharge curve. The "R" suffix denotes Tape & Reel packaging for high-volume SMT assembly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet - saving engineers hours of cross-referencing.
Drop-in alternatives for ATSAM4SA16BA-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 ATSAM4SA16BA-ANR (same form factor and footprint) — differing in Package, Core Architecture, Mounting Type, RoHS Status, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4S16BA-ANR
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4SA16BA-AN
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4SA16BA-AU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4S16CA-AU
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →ATSAM4S8CB-CFNR
✅ Drop-In✓ In Stock
$6.85 / Unit
View Datasheet →ATSAM4S8CB-CFN
✅ Drop-In✓ In Stock
$4.74 / Unit
View Datasheet →ATSAM4SA16BA-ANR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU |
| Core Architecture | 32-bit RISC |
| Maximum Clock Speed | 120 MHz |
| Program Memory (Flash) | 1 MB (1M x 8) |
| SRAM | 128 KB |
| Supply Voltage | 1.62 V to 3.6 V |
| I/O Voltage | 1.2 V / 3.3 V |
| Package | 64-LQFP (LFQFP, gull wing) |
| Terminal Form | GULL WING |
| Package Code | LFQFP |
| Package Shape | SQUARE |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Temperature Grade | INDUSTRIAL |
| Peripheral Highlights | USB 2.0 FS, CAN, 2x I2C, 4x USART, 3x SPI, 12-bit ADC |
| Packaging | Tape & Reel (T/R) |
| RoHS Status | Compliant |
ATSAM4SA16BA-ANR square Pin Configuration Guide
Pin configuration for ATSAM4SA16BA-ANR (square 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-ANR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4SA16BA-ANR is suitable for 6 applications: Industrial PLC Modules, USB Barcode Scanners, Smart Energy Meters, Building Automation Gateways, Motor Control Boards, Medical Handheld Instruments.
Industrial PLC Modules
The ATSAM4SA16BA-ANR fits industrial PLC I/O modules where deterministic 120 MHz Cortex-M4 performance and rich connectivity are required. The FPU accelerates PID-loop floating-point math, while the dual I2C and four USART buses simplify multi-slave sensor acquisition and fieldbus bridging. The 1.62 V - 3.6 V supply tolerates 24 V industrial rails with simple LDO front-ends, and the 1 MB dual-bank Flash enables on-the-fly firmware updates without halting the scan cycle. Industrial temperature rating (-40 C to +85 C) ensures operation in cabinet environments, while the 12-bit ADC (1 Msps) handles analog process signals directly. Companion devices include the MCP2551 CAN transceiver for fieldbus and the MCP1700 LDO for rail regulation.
Recommended
USB Barcode Scanners
The ATSAM4SA16BA-ANR suits USB-attached barcode and 1D/2D imager scanners where the integrated USB 2.0 Full-Speed OTG peripheral eliminates external PHY chips. The Cortex-M4 with FPU decodes complex imaging and OCR algorithms in real time, while 128 KB SRAM buffers full image frames before streaming. With 1 MB dual-bank Flash, scanner firmware can store multiple decoding libraries and update them via USB without device downtime. Designers place the MCU between the image sensor's MIPI/parallel output and the USB connector, using DMA to free the CPU for image-processing pipelines.
Recommended
Smart Energy Meters
For single-phase smart electricity meters, the ATSAM4SA16BA-ANR provides the computational headroom to compute RMS, harmonics, and reactive power in firmware without external DSP. The 12-bit ADC captures voltage and current CT channels at synchronous sampling rates, while the RTC tracks time-of-use tariffs. The 1 MB Flash stores metering logs, tamper events, and DLMS/COSEM protocol stacks, and the dual-bank architecture allows secure OTA firmware upgrades required by utility regulatory frameworks. The industrial temperature range handles meter housing thermals, and the low-power modes support battery-backed RTC during line-power outages.
Recommended
Building Automation Gateways
The ATSAM4SA16BA-ANR is a strong fit for BACnet/Modbus/LoRa building-automation gateways consolidating multiple fieldbuses. The four USARTs and three SPIs handle concurrent Modbus RTU, BACnet MS/TP, and LoRa radio traffic, while the Cortex-M4 FPU runs TLS handshake and JSON parsing for cloud uplinks. The 64-LQFP gives 47 GPIO for status LEDs and DIP addressing, while the 1.62 V - 3.6 V supply allows direct 3.3 V operation from PoE-derived rails. Industrial temperature grade supports rooftop equipment-room deployments.
Recommended
Motor Control Boards
Brushless DC and stepper motor control boards benefit from the ATSAM4SA16BA-ANR's Cortex-M4 DSP extensions that accelerate field-oriented control (FOC) and SVM algorithms at 120 MHz. The 12-bit ADC synchronizes with PWM channels for current sensing, and the 16-bit timers drive complementary PWM outputs with hardware dead-time insertion. The 1 MB Flash stores full FOC libraries plus application firmware, while the USB peripheral simplifies host-based motor-tuning GUIs. Designers should note: for higher-power 3-phase inverters, an external gate driver (e.g., MCP8026) pairs with the MCU for the high-side FETs.
Recommended
Medical Handheld Instruments
The ATSAM4SA16BA-ANR supports portable medical devices such as pulse oximeters, glucose meters, and portable ECG monitors where low power and FPU math matter. The Cortex-M4 FPU executes SpO2 and heart-rate-variability DSP in firmware, while the 1 MB Flash stores device firmware, calibration tables, and encryption keys for HIPAA-compliant data logging. The 12-bit ADC reads PPG sensor photodiode signals, and the low-power sleep modes preserve battery life between measurements. The industrial temperature range covers typical clinical and home-use environments.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SA16BA-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S16BA-ANR | ATSAM4SA16BA-AN | ATSAM4SA16BA-AU | ATSAM4S16CA-AU | ATSAM4S8CB-CFNR |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (LFQFP) | 64-LQFP - same | 64-LQFP - same | 64-LQFP - same | 64-LQFP - same | 64-LQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU |
| Max Clock Speed | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| Flash Memory | 1 MB | 1 MB | 1 MB | 1 MB | 1 MB | 8 MB |
| SRAM | 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 |
| Temperature Grade | INDUSTRIAL (-40 C to +85 C) | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL |
| Packaging Form | Tape & Reel | Tape & Reel | Tray | Tray | Tray | Tape & Reel |
Key Differentiators
- Pin-to-pin compatibility with legacy SAM families (vs ATSAM4S16BA-ANR)
- Dual-bank Flash for in-application programming (vs ATSAM4SA16BA-AN)
- Larger Flash density option within the same footprint (vs ATSAM4S8CB-CFNR)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 3 mm of every VDD/VDDIO pin, plus a single 4.7 uF bulk capacitor on the main 3.3 V rail. Per Microchip SAM4S hardware-design guidelines, the internal voltage regulator (VDDCORE) requires its own 1 uF + 100 nF capacitor pair near the VCORE pin. Brown-out reset (BOR) should be enabled in firmware to protect against partial-voltage supply droops that can corrupt Flash.
Keep the 12 MHz crystal traces shorter than 5 mm and surround them with a ground pour to minimize EMI. Route USB DP/DM as a 90-ohm differential pair with no splits in the ground plane beneath, and add 50 pF to ground on each line for ESD clamping. Place the JTAG/SWD connector (20-pin SAM-ICE standard) at the board edge for programming access. Per Microchip hardware design notes, do not route noisy switching signals under the 64-LQFP thermal pad.
Estimated: at 120 MHz CPU clock running typical industrial workloads (~50 mA active), the SAM4S in 64-LQFP dissipates approximately 165 mW. With the LQFP's theta_JA around 60 C/W, junction temperature rise above ambient is ~10 C - well within the industrial +85 C limit. No external heatsink is required, but routing continuous ground copper under the exposed die-pad area helps spread heat into the PCB.
Do not enable USB without first installing the correct 32 kHz crystal and configuring the UTMI PLL - firmware hung on 'USB not detected' is almost always a missing 12 MHz reference clock. When migrating from SAM3S/SAM7S firmware, the AFEC peripheral replaces the older ADC; register names differ, so library porting is non-trivial. The dual-bank Flash requires explicit EEFC commands to swap banks - failing to do this correctly causes boot failures after OTA updates.
The Cortex-M4 core can emit harmonics up to ~500 MHz from its internal PLL; place a ferrite bead on the analog AVVDD rail feeding the 12-bit ADC to prevent digital switching noise from coupling into analog measurements. For CAN bus, terminate with 120-ohm resistors at each end of the bus segment and use twisted-pair cabling. SPI signals to external flash should be source-terminated if the trace exceeds 50 mm.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade only; AEC-Q100 automotive grade not qualified for this MPN. Lead-free and halogen-free per Microchip material declarations.
