ATSAM4SA16BB-ANR - 1MB Flash, 120MHz Cortex-M4 MCU | Microchip
MPN: ATSAM4SA16BB-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.58 | $75.80 |
| 100 | $6.74 | $674.00 |
| 500 | $6.07 | $3,035.00 |
| 1,000 | $5.49 | $5,490.00 |
ATSAM4SA16BB-ANR Overview
What is a Cortex-M4 microcontroller? It is the ARM Cortex-M4 32-bit processor core, optimized for embedded systems that require DSP capability, hardware single-precision floating point, and low interrupt latency. Within the broader hierarchy, a Cortex-M4 MCU is a microcontroller, which is a subset of microprocessors, which belong to the broader category of integrated circuits. The SAM4S family extends this with Microchip-specific peripherals including full-speed USB Device, up to two CAN controllers, multiple UART/SPI/TWI interfaces, 12-bit ADC, 12-bit DAC, and a flexible Timer Counter block for motor control and PWM generation.
Key features confirmed from the Atmel/Microchip SAM4S datasheet include 1024 KB Flash, 160 KB SRAM, an external bus interface, embedded voltage regulator for 1.2V core operation from a 1.62-3.6V supply, and an extended industrial temperature grade. The -ANR suffix indicates 64-LQFP Green (RoHS) package with extended temperature range, MRL B silicon revision, and Tape & Reel packaging for high-volume assembly.
Architecturally, the device uses an optional dual-bank Flash with cache memory to accelerate code execution from external or internal memory, and includes a 16-bit external bus interface for memory expansion. The peripheral DMA controller reduces CPU load for high-throughput peripherals like ADC and USB, while the SleepWalking peripherals enable event-driven wake-up for low-power IoT nodes.
Typical applications include industrial automation controllers, USB peripherals and HID devices, building automation gateways, smart energy meters, motor control (BLDC/PMSM via FOC), point-of-sale terminals, automotive body and infotainment subsystems, and medical instrumentation where deterministic control combined with USB connectivity is required.
When designing with this device, ensure the main 3.3V supply decoupling network uses a 100nF ceramic close to each VDD pin and a bulk 4.7uF near the regulator output. Configure the brown-out reset and watchdog timer for unattended field deployments to recover from software faults and supply brown-outs.
This page synthesizes distributor pricing, same-package alternatives, and engineering design notes not found in the standalone datasheet, helping engineers select the right SAM4S variant faster.
Drop-in alternatives for ATSAM4SA16BB-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 ATSAM4SA16BB-ANR (same form factor and footprint) — differing in Package, ADC, CAN, DAC, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4SA16BA-AUR
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →ATSAM4S16CB-CFN
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →ATSAM4SA16BB-AUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4S8CB-CFNR
✅ Drop-In✓ In Stock
$6.85 / Unit
View Datasheet →ATSAM4S8CB-CFN
✅ Drop-In✓ In Stock
$4.74 / Unit
View Datasheet →ATSAM4SA16BB-ANR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU and DSP extensions |
| Maximum CPU Clock | 120 MHz |
| Flash Memory | 1 MB (1024 KB) |
| SRAM | 160 KB |
| Operating Voltage | 1.62 V to 3.6 V |
| Core Operating Voltage | 1.2 V (internal regulator) |
| Package | 64-LQFP (10x10 mm) |
| Pin Count | 64 |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial Extended (-40C to +85C) |
| Packaging | Tape & Reel |
| Silicon Revision | MRL B |
| RoHS Status | RoHS Compliant (Green) |
| USB Interface | Full-Speed USB Device |
| CAN | Yes (2 controllers per datasheet family) |
| ADC | 12-bit |
| DAC | 12-bit |
| MSL Level | 3 (per JEDEC J-STD-020) |
ATSAM4SA16BB-ANR Pin Configuration
| Pin 1 | PA0 — GPIO/URXD0 peripheral A |
| Pin 2 | PA1 — GPIO/UTXD0 peripheral A |
| Pin 3 | PA2 — GPIO peripheral A |
| Pin 4 | PA3 — GPIO peripheral A |
| Pin 5 | VDDOUT — Voltage regulator output (1.2V core) |
| Pin 6 | VDDIN — Voltage regulator input |
| Pin 7 | PA4 — GPIO peripheral A |
| Pin 8 | PA5 — GPIO peripheral A |
| Pin 9 | PA6 — GPIO peripheral A |
| Pin 10 | PA7 — GPIO peripheral A |
| Pin 11 | PA8 — GPIO peripheral A |
| Pin 12 | PA9 — GPIO peripheral A |
| Pin 13 | PA10 — GPIO peripheral A |
| Pin 14 | PA11 — GPIO peripheral A |
| Pin 15 | PA12 — GPIO peripheral A |
| Pin 16 | PA13 — GPIO peripheral A |
| Pin 17 | PA14 — GPIO peripheral A |
| Pin 18 | VDDCORE — Core supply (decoupling) |
| Pin 19 | GND — Ground |
| Pin 20 | PB0 — GPIO peripheral B |
| Pin 21 | PB1 — GPIO peripheral B |
| Pin 22 | PB2 — GPIO peripheral B |
| Pin 23 | PB3 — GPIO peripheral B |
| Pin 24 | PB4 — GPIO peripheral B |
| Pin 25 | PB5 — GPIO peripheral B |
| Pin 26 | PB6 — GPIO peripheral B |
| Pin 27 | PB7 — GPIO peripheral B |
| Pin 28 | PB8 — GPIO peripheral B |
| Pin 29 | PB9 — GPIO peripheral B |
| Pin 30 | PB10 — GPIO peripheral B |
| Pin 31 | PB11 — GPIO peripheral B |
| Pin 32 | PB12 — GPIO peripheral B |
| Pin 33 | PB13 — GPIO peripheral B |
| Pin 34 | PB14 — GPIO peripheral B |
| Pin 35 | PB15 — GPIO peripheral B |
| Pin 36 | PC0 — GPIO peripheral C |
| Pin 37 | PC1 — GPIO peripheral C |
| Pin 38 | PC2 — GPIO peripheral C |
| Pin 39 | PC3 — GPIO peripheral C |
| Pin 40 | PC4 — GPIO peripheral C |
| Pin 41 | PC5 — GPIO peripheral C |
| Pin 42 | PC6 — GPIO peripheral C |
| Pin 43 | PC7 — GPIO peripheral C |
| Pin 44 | PC8 — GPIO peripheral C |
| Pin 45 | PC9 — GPIO peripheral C |
| Pin 46 | PC10 — GPIO peripheral C |
| Pin 47 | PC11 — GPIO peripheral C |
| Pin 48 | PC12 — GPIO peripheral C |
| Pin 49 | PC13 — GPIO peripheral C |
| Pin 50 | PC14 — GPIO peripheral C |
| Pin 51 | PC15 — GPIO peripheral C |
| Pin 52 | PD0 — GPIO peripheral D |
| Pin 53 | PD1 — GPIO peripheral D |
| Pin 54 | PD2 — GPIO peripheral D |
| Pin 55 | PD3 — GPIO peripheral D |
| Pin 56 | PD4 — GPIO peripheral D |
| Pin 57 | PD5 — GPIO peripheral D |
| Pin 58 | PD6 — GPIO peripheral D |
| Pin 59 | PD7 — GPIO peripheral D |
| Pin 60 | PD8 — GPIO peripheral D |
| Pin 61 | PD9 — GPIO peripheral D |
| Pin 62 | NRST — Reset input, active low |
| Pin 63 | TDI — JTAG Test Data In |
| Pin 64 | TMS — JTAG Test Mode Select |
Typical Applications
ATSAM4SA16BB-ANR is suitable for 6 applications: Industrial Automation Controller, USB HID / Peripheral Device, Motor Control (BLDC / PMSM FOC), Smart Energy Meter / Data Logger, Building Automation Gateway, Medical Instrumentation.
Industrial Automation Controller
The ATSAM4SA16BB-ANR fits industrial PLC and HMI controller applications because its 120 MHz Cortex-M4 with hardware FPU executes deterministic PID control loops within microsecond budgets, while the 1 MB Flash accommodates complex ladder-logic or IEC 61131-3 runtime plus bootloader and OTA update staging. The two on-chip CAN controllers directly interface with industrial sensor and actuator buses (CANopen, DeviceNet), and the 12-bit ADC with up to 24 channels captures 4-20 mA loop-back signals at sample rates well above the Nyquist limit for process control. Unlike lower-end Cortex-M0 MCUs, the SAM4S peripheral DMA offloads ADC and CAN traffic from the CPU, enabling the controller to run multi-axis motion profiles on a single chip. Industrial extended temperature grade (-40C to +85C) supports factory-floor deployments without additional thermal management.
Recommended
USB HID / Peripheral Device
The ATSAM4SA16BB-ANR's integrated Full-Speed USB Device port with on-chip transceiver and dedicated DMA channel makes it ideal for USB HID peripherals, barcode scanners, and human-interface devices. Its 120 MHz Cortex-M4 with 1 MB Flash can implement HID class drivers, vendor-specific protocols, and field-upgradeable bootloaders within a single chip, eliminating an external USB controller. The 160 KB SRAM supports USB descriptor tables, endpoint buffers, and report FIFOs without external SRAM. Compared to the ATSAM4S8 (512 KB Flash), the SAM4SA16 doubles the firmware budget for richer feature sets while keeping the same 64-LQFP footprint. Designers should add 15 kohm pull-down on D+ and ESD protection (USBLC6-2) on DP/DM for production-grade USB compliance.
Recommended
Motor Control (BLDC / PMSM FOC)
The ATSAM4SA16BB-ANR executes Field-Oriented Control (FOC) algorithms for brushless DC and permanent-magnet synchronous motors because the Cortex-M4's hardware single-precision FPU and DSP extensions accelerate Park/Clarke transforms and SVPWM modulation within sub-10us loop times. The 1 MB Flash holds three-phase control libraries plus sensorless observer algorithms, while 160 KB SRAM retains per-phase state variables and current-loop scratch buffers. The peripheral Timer Counter block generates complementary PWM with programmable dead-time insertion, and the 12-bit ADC synchronized to PWM triggers samples current at the optimal switching instant. The 64-LQFP package exposes enough GPIO for three-phase gate drivers, encoder inputs, and CAN feedback, suiting robotic arm and drone ESC designs.
Recommended
Smart Energy Meter / Data Logger
The ATSAM4SA16BB-ANR is well suited for smart electricity, gas, and water metering endpoints because its Cortex-M4 DSP extensions compute FFT-based harmonic analysis and power-quality metrics (THD, power factor) directly on raw ADC samples. The 1 MB Flash stores metering firmware, calibration tables, and a DLMS/COSEM or Modbus protocol stack, while 160 KB SRAM buffers instantaneous measurement frames and rolling averages. The 12-bit ADC with differential PGA measures CT/PT-derived analog signals with adequate accuracy for class 1.0 metering. The SleepWalking peripherals allow the MCU to wake on meter events while consuming low quiescent current, supporting battery-backed tamper detection. Compared to the ATSAM4S4 (256 KB Flash), the SAM4SA16 reserves headroom for future wireless M-Bus or LoRaWAN add-on modules.
Recommended
Building Automation Gateway
The ATSAM4SA16BB-ANR serves as a building automation gateway controller because its dual CAN interfaces support BACnet MS-TP and CANopen simultaneously, while multiple UART/SPI/TWI channels connect to RS-485 Modbus sensors, KNX transceivers, and HVAC actuators. The 120 MHz Cortex-M4 handles concurrent protocol translation between BACnet/IP, Modbus TCP, and Modbus RTU stacks without a real-time OS overhead, fitting in 1 MB Flash. The 64-LQFP 10x10 mm footprint simplifies integration into DIN-rail gateway enclosures, and the industrial temperature range suits mechanical rooms and outdoor cabinets. Compared to smaller Cortex-M0+ MCUs, the SAM4SA16's DMA reduces CPU load when aggregating data from multiple fieldbuses.
Recommended
Medical Instrumentation
The ATSAM4SA16BB-ANR fits portable medical instrumentation like infusion pumps, pulse oximeters, and patient monitors because its Cortex-M4 DSP engine computes SpO2 algorithms, ECG R-peak detection, and PID-controlled drug delivery within tight clinical timing budgets. The 1 MB Flash stores FDA-validated firmware with field-upgrade pathways, while 160 KB SRAM buffers waveform histories before wireless transmission. The 12-bit ADC captures bioelectric signals with adequate resolution for screening-grade measurements, and the 12-bit DAC generates calibration stimulus. The extended industrial temperature range supports clinical environments from cooled wards to operating rooms. Designers should pair with medical-grade isolation (ISO 60601-1) and use the SAM4S peripheral CRC for firmware integrity verification per FDA cybersecurity guidance.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SA16BB-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SA16BA-AUR | ATSAM4S16CB-CFN | ATSAM4S8CB-CFNR | STM32F407VGT6 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 100-LQFP (14x14 mm) |
| 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 |
| Max CPU Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 168 MHz |
| Flash Memory | 1024 KB (1 MB) | 1024 KB (1 MB) | 1024 KB (1 MB) | 512 KB | 1024 KB (1 MB) |
| SRAM | 160 KB | 160 KB | 160 KB | 128 KB | 192 KB |
| 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 | 1.8 V to 3.6 V |
| Temperature Grade | Industrial Extended (-40C to +85C) | Industrial Extended (-40C to +85C) | Industrial Extended (-40C to +85C) | Industrial Extended (-40C to +85C) | Industrial (-40C to +85C) |
| USB Interface | Full-Speed USB Device | Full-Speed USB Device | Full-Speed USB Device | Full-Speed USB Device | USB OTG Full+High Speed |
Key Differentiators
- Largest Flash in 64-LQFP SAM4S family (vs ATSAM4S8CB-CFNR)
- MRL B silicon revision with USB errata fix (vs ATSAM4SA16BA-AUR)
- Higher CPU clock than legacy SAM3 Cortex-M3 (vs ATSAM3S family)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor on each VDD/VDDIO pin and a 4.7 uF bulk capacitor on the VDDIN pin within 5 mm of the package. The internal 1.2V core regulator (LDO) requires at least 1 uF of low-ESR capacitance on VDDCORE; insufficient decoupling will trigger core voltage brown-out resets at 120 MHz operation. Estimated: total in-rush current at 120 MHz with all peripherals active is approximately 50 mA, so a 4.7 uF bulk capacitor provides safe margin.
Route JTAG/SWD signals (TMS, TCK, TDI, TDO, NRST) with traces shorter than 50 mm and keep them at least 3 mm away from high-frequency switching nodes like PWM outputs and crystal traces. Use a continuous ground plane on layer 2 directly under the MCU to provide a low-impedance return path. Place the 12 MHz main crystal within 5 mm of XIN/XOUT pins and surround the crystal traces with a ground guard ring. Estimated: ground-plane inductance should stay below 1 nH/cm to keep radiated emissions below EN 55022 Class B limits.
Do not leave the NRST pin floating - a 10 kohm pull-up to VDDIO is mandatory for proper reset behavior. Enable the watchdog timer (WDT) with a 1-2 second timeout in unattended field deployments to recover from firmware hangs. Verify Flash programming voltage timing matches the datasheet's NVM parameters before mass production; out-of-spec timing can silently corrupt firmware. Per Microchip errata documents, MRL A silicon has a USB suspend-current bug; MRL B silicon (recommended for new designs) fixes this issue.
Compliance Information
RoHS-compliant (Green) per -AN suffix. Industrial extended temperature grade -40C to +85C. Not AEC-Q100 qualified; for automotive applications, choose ATSAM4SA16BB-ANR automotive-grade variants or ATSAM-V71 family.
