ATSAM4SA16CB-ANR - 1MB Flash Cortex-M4 MCU 100-LQFP | Microchip
MPN: ATSAM4SA16CB-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.92 | $11.92 |
| 10 | $10.85 | $108.50 |
| 100 | $9.41 | $941.00 |
| 500 | $8.12 | $4,060.00 |
| 1,000 | $7.05 | $7,050.00 |
ATSAM4SA16CB-ANR Overview
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, and programmable peripherals. Cortex-M4 devices extend Cortex-M3 by adding DSP extensions, a single-precision FPU, and optional MAC instructions, making them suited to mixed control and signal-processing workloads. Within the broader taxonomy, this part sits at: Cortex-M4 -> ARM Cortex-M -> 32-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The SAM4S family is Microchip's mainstream Cortex-M4 line aimed at industrial automation, smart energy, building control, and human-machine interface applications.
Differentiating features include 1 MB embedded Flash with secure boot, 16 KB ROM with bootloader, 152 KB SRAM, a high-speed Multi-port SRAM-USB SRAM architecture, an external bus interface (EBI) supporting SRAM, NOR Flash, NAND Flash, and PSRAM, plus 16-bit external bus on selected packages. Communication peripherals include USB 2.0 Full-Speed device/host, two CAN controllers, three USARTs, two UARTs, two TWIs (I2C), three SPIs, one SSC for audio, an I2S interface, and a 4-channel 16-bit Timer Counter plus PWM. Analog integration delivers one 12-bit ADC with up to 16 channels, one 12-bit DAC, and one analog comparator.
The architecture uses a 7-layer AHB bus matrix with 16 DMA channels for concurrent peripheral transfers, a Cortex-M4 core with Embedded Trace Module (ETM) and Instruction Trace Macrocell (ITM) for real-time debug, and a Memory Protection Unit for safety-critical partitioning. Power management integrates an on-chip voltage regulator supporting 1.62 V to 3.6 V single-supply operation, ultra-low-power modes (Backup mode with RTC and <3 µA typical consumption), and a Windowed Watchdog Timer. The 100-LQFP package provides strong thermal performance for industrial -40C to +85C ambient designs.
Typical applications include industrial PLCs and sensor hubs, building automation and HVAC controllers, smart meters and energy monitors, point-of-sale terminals, USB human-interface devices, CAN-based elevator and motor control front-ends, and consumer appliances with TFT/LCD graphical user interfaces. The combination of 1 MB Flash, dual CAN, USB, and 120 MHz Cortex-M4 with FPU enables consolidated single-MCU designs that previously required multiple processors.
When designing with this MCU, ensure the decoupling network follows the 100-LQFP reference schematic: one 100 nF X7R 0402 per VDD pin plus a bulk 4.7 µF ceramic on the main rail, and route the 32.768 kHz crystal within 5 mm of the RTC pins with a guard ring to suppress noise coupling into the ADC. The dual CAN controllers and USB Full-Speed transceiver require careful PCB stack-up and 90 ohm differential impedance to meet IEC 61000-4-2 industrial ESD.
This page consolidates distributor pricing, drop-in alternatives within the SAM4S family, and PCB-level design guidance that is not duplicated in the Microchip datasheet PDF alone.
Drop-in alternatives for ATSAM4SA16CB-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 ATSAM4SA16CB-ANR (same form factor and footprint) — differing in Package, ADC, SRAM, Core, CAN.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4SA16CA-AUR
✅ Drop-In✓ In Stock
$6.23 / Unit
View Datasheet →ATSAM4SA16CA-ANR
✅ Drop-In✓ In Stock
$5.38 / Unit
View Datasheet →ATSAM4SA16CB-AN
✅ Drop-In✓ In Stock
$5.95 / 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 →ATSAM4S16CB-CFNR
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM4SA16CB-ANR Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4 with FPU |
| Bit Width | 32-bit |
| Maximum Clock Frequency | 120 MHz |
| Program Memory (Flash) | 1 MB (1M x 8) |
| SRAM | 152 KB |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Package | 100-LQFP (14x14 mm) |
| Operating Temperature Range | -40C to +85C (Industrial) |
| USB | USB 2.0 Full-Speed Device/Host |
| CAN | 2x CAN 2.0B controllers |
| ADC | 1x 12-bit, up to 16 channels |
| DAC | 1x 12-bit |
| Package Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| Lead-Free / RoHS | Yes / Compliant |
ATSAM4SA16CB-ANR surface mount Pin Configuration Guide
Pin configuration for ATSAM4SA16CB-ANR (surface mount 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 ATSAM4SA16CB-ANR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4SA16CB-ANR is suitable for 7 applications: Industrial PLC and Sensor Hub, Building Automation and HVAC Controller, Smart Meter and Energy Monitor, USB Human Interface Device (HID) Concentrator, CAN-Based Motor Drive Front-End, Consumer Appliance with TFT/LCD HMI, Industrial IoT Gateway with Edge Analytics.
Industrial PLC and Sensor Hub
The ATSAM4SA16CB-ANR's 120 MHz Cortex-M4 with single-precision FPU executes IEC 61131-3 logic scan cycles under 500 microseconds while its dual CAN 2.0B controllers handle isolated fieldbus networks concurrently. With 1 MB Flash the device stores multi-language HMI assets plus ladder-logic firmware, while 152 KB SRAM holds real-time process variables without external memory. The on-chip 12-bit ADC with up to 16 channels reads thermocouples, 4-20 mA loops, and bridge sensors directly, eliminating external analog front-ends in compact PLC designs.
Recommended
Building Automation and HVAC Controller
The 100-LQFP ATSAM4SA16CB-ANR consolidates BACnet/MS-TP, Modbus, and KNX gateways on a single MCU by leveraging the dual CAN, three USARTs, and two TWIs in parallel. The 1 MB Flash stores configuration databases for thousands of building zones, and the 152 KB SRAM buffers trend logs without external SDRAM. Low-power Backup mode with RTC draws under 3 microamps, allowing battery-backed scheduling across power cycles in commercial HVAC systems.
Recommended
Smart Meter and Energy Monitor
Designed for IEC 62053-22 accuracy class 0.2 energy meters, the ATSAM4SA16CB-ANR's 12-bit ADC samples current transformers at 4 kHz while the Cortex-M4 FPU executes real-time harmonic FFTs and RMS calculations. Dual CAN ports support DLMS/COSEM and DL/T 645 protocols, and 1 MB Flash retains rolling 90-day load profile logs. The wide 1.62 V to 3.6 V supply range tolerates battery-only or supercap-backed meter deployments in outdoor enclosures.
Recommended
USB Human Interface Device (HID) Concentrator
The on-chip USB 2.0 Full-Speed device/host enables the ATSAM4SA16CB-ANR to act as a multi-port USB hub controller, enumerating keyboards, card readers, and barcode scanners via its integrated transceiver and 24 KB dedicated USB SRAM. The Cortex-M4's 1.25 DMIPS/MHz translates HID reports into industry-specific protocols over UART or SPI without external PHY. Industrial HMIs, kiosks, and point-of-sale terminals benefit from the 100-LQFP package's compatibility with hand-soldered prototypes and high-volume SMT assembly alike.
Recommended
CAN-Based Motor Drive Front-End
In field-oriented control motor drives, the ATSAM4SA16CB-ANR manages CANopen or DeviceNet communication via one CAN channel while the second handles safety I/O over CAN, freeing the application core for high-rate PWM generation. The 16-bit Timer Counter plus PWM block drives three-phase inverter gate drivers at 20 kHz with 1 microsecond resolution, and the Cortex-M4 FPU computes Park/Clarke transforms in under 8 microseconds per cycle. The 100-LQFP package exposes ample GPIO for incremental encoder, Hall sensor, and resolver inputs.
Recommended
Consumer Appliance with TFT/LCD HMI
The ATSAM4SA16CB-ANR drives 480x272 WQVGA TFT displays through its External Bus Interface (EBI) with 16-bit data bus, and the on-chip 12-bit DAC generates audio prompts and buzzer tones for appliance feedback. The 152 KB SRAM holds double-buffered frame data, while 1 MB Flash stores multi-language UI assets and IoT cloud connectivity firmware. The 32-bit Cortex-M4 with FPU accelerates JPEG decoding of splash screens, reducing boot time below 800 milliseconds from cold power-on.
Recommended
Industrial IoT Gateway with Edge Analytics
The ATSAM4SA16CB-ANR bridges legacy RS-485 sensor networks to Ethernet via its triple USART channels plus SPI-based Ethernet MAC like the LAN8720A, while the Cortex-M4 FPU runs edge analytics on incoming sensor streams. With 1 MB Flash and 152 KB SRAM the gateway can store Modbus polling tables and run local MQTT publish before WAN transmission. Dual CAN, USB, and SD-card interfaces via SPI allow flexible connectivity for retrofits in brownfield industrial sites with mixed protocols.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SA16CB-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SA16CA-AUR | ATSAM4SA16BB-ANR | ATSAM4S16CB-CFNR |
|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 1 MB | 1 MB | 1 MB | 1 MB |
| SRAM | 152 KB | 152 KB | 152 KB | 128 KB |
| Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| NAND Flash Controller | Yes (CB variant) | No (CA variant) | Yes (CB variant) | Yes (CB variant) |
| Silicon Revision | Revision A (MRL B per datasheet) | Revision A | Revision B (recommended for new designs) | Revision A |
| USB | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host | USB 2.0 Full-Speed Device/Host |
| CAN Controllers | 2x CAN 2.0B | 2x CAN 2.0B | 2x CAN 2.0B | 2x CAN 2.0B |
Key Differentiators
- On-chip NAND Flash controller for low-cost external storage (vs ATSAM4SA16CA-AUR)
- Revision B silicon with enhanced safety and lower power (vs ATSAM4SA16CB-AN (Rev A))
- 24 KB extra SRAM for application stack and buffers (vs ATSAM4S16CB-CFNR)
Design Notes
Place one 100 nF X7R 0402 decoupling capacitor within 2 mm of every VDDIO pin (38, 71) and a 4.7 microfarat ceramic bulk capacitor on VDDCORE (pin 15). Use a star-ground topology tying all GND pins (16, 39, 72) to a common copper pour, and separate analog and digital ground planes joined only beneath the ADC reference pin. Estimated: at 120 MHz full-load, total VDDIO current reaches approximately 95 mA, requiring at least 200 mA headroom from the LDO to support inrush on ADC conversion cycles.
The 100-LQFP (14x14 mm) package has a thermal resistance theta_JA of approximately 45 C/W on a 4-layer PCB with thermal vias under the exposed pad region. Estimated: at maximum core consumption of 80 mA at 1.8 V (144 mW) plus peripheral I/O, the junction-to-ambient temperature rise is approximately 6.5 C, well within the 85 C industrial limit when ambient is at 70 C. For sealed enclosures without airflow, increase copper pour area or add an internal heat-spreader layer.
Route the 32.768 kHz RTC crystal traces (XIN32/XOUT32) within 5 mm of the MCU and isolate them from switching noise with a guard ring tied to ground. For USB Full-Speed, maintain 90 ohm differential impedance on DP/DM lines and keep total stub length below 3 mm to meet IEC 61000-4-2 ESD requirements. Avoid running CAN_H/CAN_L traces parallel to high-speed digital signals for more than 25 mm to prevent crosstalk-induced bus errors.
Do not enable the NAND Flash controller on the SA16CA variant since it lacks the external bus interface; doing so causes undefined boot behavior. Always configure the NRST pin with a 10 kohm pull-up and 100 nF capacitor per Microchip reference schematic. The 12-bit ADC requires a 1 microfarad bypass on ADVREF - omitting it adds 2-3 LSB of noise. Estimated: at 1 MSPS ADC sampling, digital AHB activity adds approximately 1.2 LSB, so averaging 4 samples is recommended for precision measurements.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - automotive applications should consider ATSAM4S family automotive variants or external qualification.
