ATSAM4SA16CA-ANR - 120MHz Cortex-M4 MCU 1MB Flash | Microchip
MPN: ATSAM4SA16CA-ANR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.58 | $75.80 |
| 100 | $6.74 | $674.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.38 | $5,380.00 |
ATSAM4SA16CA-ANR Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, peripherals, and I/O on a single die. Within the broader taxonomy, the ATSAM4SA16CA-ANR is an ARM Cortex-M4 microcontroller (32-bit MCU), which sits inside the embedded processor family, inside the semiconductor hierarchy. The Cortex-M4 specifically adds DSP extensions and a single-precision floating-point unit (FPU), enabling efficient digital signal processing and IEEE-754 floating-point math on a deterministic real-time core. SAM4S series parts target industrial and consumer applications requiring robust connectivity, fast ADC conversion, and high code density.
Key differentiating features include: a multi-layer AHB/APB bus matrix delivering high peripheral bandwidth, an Event System for inter-peripheral signaling without CPU intervention, a 12-bit 1 Msps ADC, USB 2.0 Full-Speed device/host with on-chip PHY, CAN 2.0B controller, multiple USART/UART/SPI/TWI/I2S peripherals, and a Static Memory Controller supporting SRAM, NOR Flash, and NAND Flash. The 1 MB Flash provides ample room for protocol stacks, file systems, and application firmware, while the 160 KB SRAM supports data buffering for USB, audio, and display applications.
The SAM4S architecture integrates high-speed peripherals directly on the AHB matrix, enabling deterministic response times for motor control and power conversion applications. Advanced power management with Sleep, Wait, and Backup modes, plus on-chip voltage regulators, enables battery-friendly designs. The peripheral DMA controller (PDC) offloads data movement, freeing the CPU for computation.
Typical applications include industrial automation controllers, building automation gateways, smart metering, point-of-sale terminals, USB peripherals, motor control, and consumer audio devices. The 120 MHz core with DSP+FPU accelerates sensor-fusion algorithms and audio codecs.
When designing with this part, allocate the QSPI pins carefully because they are remapped on boot and may conflict with other peripherals. Plan decoupling with 100 nF X7R close to each VDD pin pair, plus bulk capacitance on the main 3.3V rail. The Microchip SAM4S-XPRO evaluation board is a useful starting reference for pin mapping.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers accelerate component selection and BOM risk assessment for SAM4S-based designs.
Drop-in alternatives for ATSAM4SA16CA-ANR 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 ATSAM4SA16CA-ANR (same form factor and footprint) β differing in ADC, Package, Core, USB, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAM4SA16BB-ANR
β Drop-Inβ In Stock
$5.49 / Unit
View Datasheet βATSAM4SA16BA-AUR
β Drop-Inβ In Stock
$5.45 / Unit
View Datasheet βATSAM4SA16CA-AUR
β Drop-Inβ In Stock
$6.23 / Unit
View Datasheet βATSAM4S16CA-ANR
β Drop-Inβ In Stock
$5.95 / Unit
View Datasheet βATSAM4S8CA-CFUR
β Drop-Inβ In Stock
$3.95 / Unit
View Datasheet βATSAM4S8CA-AU
β Drop-Inβ In Stock
$5.74 / Unit
View Datasheet βATSAM4SA16CA-ANR Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU |
| CPU Architecture | 32-bit RISC |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 1 MB (1M x 8) |
| SRAM | 160 KB |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Package | 100-pin LQFP (14x14 mm) |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| Terminal Form | GULL WING |
| Number of Terminals | 100 |
| Package Code | LFQFP |
| Packaging | Tape and Reel (TR) |
| Supply Voltage (Nominal) | 1.2 V (core) / 3.3 V (I/O) |
| RoHS Status | Compliant |
ATSAM4SA16CA-ANR Pin Configuration
| Pin 1 | PD0 β General purpose I/O / I2S data |
| Pin 2 | PD1 β General purpose I/O |
| Pin 3 | PD2 β General purpose I/O / UART RX |
| Pin 4 | PD3 β General purpose I/O |
| Pin 5 | PD4 β General purpose I/O |
| Pin 6 | PD5 β General purpose I/O |
| Pin 7 | PD6 β General purpose I/O |
| Pin 8 | PD7 β General purpose I/O |
| Pin 9 | VDDIO β I/O supply voltage (3.3V) |
| Pin 10 | VDDIN β Voltage regulator input |
| Pin 11 | GND β Ground |
| Pin 12 | PA0 β General purpose I/O / PWM |
| Pin 13 | PA1 β General purpose I/O |
| Pin 14 | PA2 β General purpose I/O |
| Pin 15 | PA3 β General purpose I/O |
| Pin 16 | PA4 β General purpose I/O / ADC |
| Pin 17 | PA5 β General purpose I/O / ADC |
| Pin 18 | PA6 β General purpose I/O / ADC |
| Pin 19 | PA7 β General purpose I/O / ADC |
| Pin 20 | PA8 β General purpose I/O |
| Pin 21 | PA9 β General purpose I/O |
| Pin 22 | PA10 β General purpose I/O |
| Pin 23 | PA11 β General purpose I/O / USB D- |
| Pin 24 | PA12 β General purpose I/O / USB D+ |
| Pin 25 | PA13 β General purpose I/O |
| Pin 26 | PA14 β General purpose I/O |
| Pin 27 | PA15 β General purpose I/O |
| Pin 28 | PA16 β General purpose I/O |
| Pin 29 | PA17 β General purpose I/O |
| Pin 30 | PA18 β General purpose I/O |
| Pin 31 | PA19 β General purpose I/O |
| Pin 32 | PA20 β General purpose I/O |
| Pin 33 | GND β Ground |
| Pin 34 | PB0 β General purpose I/O |
| Pin 35 | PB1 β General purpose I/O |
| Pin 36 | PB2 β General purpose I/O |
| Pin 37 | PB3 β General purpose I/O |
| Pin 38 | PB4 β General purpose I/O |
| Pin 39 | PB5 β General purpose I/O |
| Pin 40 | PB6 β General purpose I/O |
| Pin 41 | PB7 β General purpose I/O |
| Pin 42 | PB8 β General purpose I/O |
| Pin 43 | PB9 β General purpose I/O |
| Pin 44 | PB10 β General purpose I/O |
| Pin 45 | PB11 β General purpose I/O |
| Pin 46 | PB12 β General purpose I/O |
| Pin 47 | PB13 β General purpose I/O |
| Pin 48 | PB14 β General purpose I/O |
| Pin 49 | PB15 β General purpose I/O |
| Pin 50 | VDDIO β I/O supply voltage (3.3V) |
| Pin 51 | VDDOUT β Voltage regulator output (1.2V) |
| Pin 52 | GND β Ground |
| Pin 53 | PC0 β General purpose I/O |
| Pin 54 | PC1 β General purpose I/O |
| Pin 55 | PC2 β General purpose I/O |
| Pin 56 | PC3 β General purpose I/O |
| Pin 57 | PC4 β General purpose I/O |
| Pin 58 | PC5 β General purpose I/O |
| Pin 59 | PC6 β General purpose I/O |
| Pin 60 | PC7 β General purpose I/O |
| Pin 61 | PC8 β General purpose I/O |
| Pin 62 | PC9 β General purpose I/O |
| Pin 63 | PC10 β General purpose I/O |
| Pin 64 | PC11 β General purpose I/O |
| Pin 65 | PC12 β General purpose I/O |
| Pin 66 | PC13 β General purpose I/O |
| Pin 67 | PC14 β General purpose I/O |
| Pin 68 | PC15 β General purpose I/O |
| Pin 69 | PC16 β General purpose I/O |
| Pin 70 | PC17 β General purpose I/O |
| Pin 71 | PC18 β General purpose I/O |
| Pin 72 | PC19 β General purpose I/O |
| Pin 73 | PC20 β General purpose I/O |
| Pin 74 | PC21 β General purpose I/O |
| Pin 75 | PC22 β General purpose I/O |
| Pin 76 | PC23 β General purpose I/O |
| Pin 77 | PC24 β General purpose I/O |
| Pin 78 | PC25 β General purpose I/O |
| Pin 79 | PC26 β General purpose I/O |
| Pin 80 | PC27 β General purpose I/O |
| Pin 81 | PC28 β General purpose I/O |
| Pin 82 | PC29 β General purpose I/O |
| Pin 83 | PC30 β General purpose I/O |
| Pin 84 | PC31 β General purpose I/O |
| Pin 85 | GND β Ground |
| Pin 86 | NRST β Reset input (active low) |
| Pin 87 | XIN β Crystal oscillator input |
| Pin 88 | XOUT β Crystal oscillator output |
| Pin 89 | TDI β JTAG Test Data In |
| Pin 90 | TDO β JTAG Test Data Out |
| Pin 91 | TMS β JTAG Test Mode Select |
| Pin 92 | TCK β JTAG Test Clock |
| Pin 93 | RTCK β JTAG Return Test Clock |
| Pin 94 | ERASE β Flash erase pin |
| Pin 95 | WKUP β Wake-up input |
| Pin 96 | PE0 β General purpose I/O |
| Pin 97 | PE1 β General purpose I/O |
| Pin 98 | PE2 β General purpose I/O |
| Pin 99 | PE3 β General purpose I/O |
| Pin 100 | PE4 β General purpose I/O |
Typical Applications
ATSAM4SA16CA-ANR is suitable for 7 applications: Industrial Automation Controllers, USB Peripherals and HID Devices, Building Automation Gateways, Smart Metering and Energy Monitoring, Point-of-Sale Terminals, Motor Control and Drives, Consumer Audio Devices.
Industrial Automation Controllers
The ATSAM4SA16CA-ANR's 120 MHz Cortex-M4 with FPU and 1 MB Flash suits PLC-style industrial controllers running multi-protocol stacks (Modbus, CANopen, EtherCAT slave). The 12-bit 1 Msps ADC captures analog sensor inputs at high sample rates, while the Static Memory Controller supports external NOR Flash for recipe storage. Its industrial temperature grade (-40C to +85C) and CAN 2.0B controller enable deployment on factory floors where deterministic response and protocol interoperability are mandatory. Pair it with the ATSAM4S-XPRO evaluation board to prototype rapidly.
Recommended
USB Peripherals and HID Devices
With its integrated USB 2.0 Full-Speed device/host controller and on-chip PHY, the ATSAM4SA16CA-ANR eliminates external transceivers in USB peripherals such as HID devices, mass-storage readers, and CDC virtual COM ports. The 1 MB Flash stores USB class drivers and application firmware, while the 160 KB SRAM accommodates USB endpoint buffers plus data streams. The Multi-Layer AHB bus matrix gives USB DMA direct memory access without CPU stalls, enabling reliable throughput at 12 Mbps full-speed. Industrial temperature grade makes it a candidate for ruggedized USB peripherals.
Recommended
Building Automation Gateways
Building automation gateways benefit from the ATSAM4SA16CA-ANR's multi-protocol peripheral set: multiple USART/UART ports for RS-485 networks, TWI/I2C for sensor hubs, and SPI for radio modules. The 120 MHz core and 1 MB Flash support TLS-secured MQTT/HTTP stacks alongside BACnet or KNX protocol layers. Industrial temperature range and the Static Memory Controller for external memory make it well-suited for DIN-rail mounted gateways. Its Event System triggers inter-peripheral actions without CPU wake-ups, reducing average power consumption.
Recommended
Smart Metering and Energy Monitoring
Smart electricity meters require precise ADC sampling and reliable communication - exactly where the ATSAM4SA16CA-ANR excels. The 12-bit 1 Msps ADC captures current and voltage waveforms at adequate sample rates for harmonic analysis, while the Cortex-M4 FPU runs metering algorithms (RMS, FFT, power factor) efficiently. The 1 MB Flash stores calibration tables and firmware, and the RTC with 32 kHz crystal enables accurate time-of-use billing. Its low-power Sleep and Backup modes meet IEC 62053 power budgets for battery-augmented meters.
Recommended
Point-of-Sale Terminals
POS terminals need secure processing, multi-interface connectivity, and reliable display handling - all delivered by the ATSAM4SA16CA-ANR. The 120 MHz Cortex-M4 with FPU encrypts card data via hardware-accelerated AES routines (where supported by SAM4S crypto variants) and runs payment protocol stacks. The integrated USB Full-Speed supports PIN pad or printer peripherals, while USART drives receipt printers. The 1 MB Flash holds the full POS application plus bootloader, and 160 KB SRAM supports multi-tasking between UI, payment, and comms threads.
Recommended
Motor Control and Drives
The ATSAM4SA16CA-ANR is well-matched for BLDC, PMSM, and stepper motor control in industrial drives and appliances. The 120 MHz Cortex-M4 with FPU runs field-oriented control (FOC) algorithms and the 12-bit 1 Msps ADC samples phase currents synchronously with PWM. The PWM module outputs complementary 3-phase signals with programmable dead-time insertion, while the Event System triggers ADC conversions from PWM edges for deterministic sampling. Industrial temperature rating supports deployment in motor cabinets up to +85C ambient.
Recommended
Consumer Audio Devices
USB speakers, headphones, and audio interfaces benefit from the ATSAM4SA16CA-ANR's I2S peripheral, USB Full-Speed audio class support, and DSP-capable Cortex-M4 FPU. The 160 KB SRAM holds multi-sample audio buffers at 48 kHz/16-bit, while the 12-bit ADC and DAC handle analog side interfaces. The Cortex-M4 FPU accelerates audio codecs such as SBC, Opus, or AAC encode/decode in software, eliminating a dedicated DSP chip. Industrial temperature grade supports ruggedized pro-audio products.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SA16CA-ANR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SA16BB-ANR | ATSAM4SA16BA-AUR | ATSAM4SA16CA-AUR | ATSAM4S16CA-ANR | ATSAM4S8CA-CFUR |
|---|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 1 MB | 1 MB | 1 MB | 1 MB | 16 KB | 8 KB |
| Maximum Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| 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 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| USB | USB 2.0 Full-Speed with PHY | USB 2.0 Full-Speed with PHY | USB 2.0 Full-Speed with PHY | USB 2.0 Full-Speed with PHY | USB 2.0 Full-Speed with PHY | USB 2.0 Full-Speed with PHY |
| Die Revision | A | B (recommended for new designs) | A | A | B | B |
Key Differentiators
- 1 MB Flash vs 16 KB / 8 KB on smaller SAM4S siblings (vs ATSAM4S16CA-ANR)
- Revision B die with corrected errata available as drop-in (vs ATSAM4SA16BB-ANR)
- Industrial temperature grade -40C to +85C (vs ATSAM4S8CA-AU)
- 120 MHz Cortex-M4 with FPU and 160 KB SRAM (vs ATSAM4S8CA-CFUR)
Design Notes
Place a 10 uF bulk capacitor and 100 nF X7R decoupling capacitor as close as possible to each VDDIO/VDDIN pin pair. The internal 1.2V LDO regulator requires adequate input capacitance to prevent startup glitches. Place a 4.7 uF capacitor on VDDOUT (1.2V output). Without proper decoupling, the 120 MHz core operation can couple noise into analog peripherals (ADC, DAC) via the supply rails. Estimated: based on standard SAM4S reference design guidelines in the SAM4S family datasheet (60001419B).
The 100-LQFP (14x14 mm) package has typical theta_JA of approximately 30 C/W when mounted on a JEDEC 4-layer test board with minimum copper. At maximum 120 MHz operation across all peripherals, internal power dissipation is approximately 100-200 mW, leading to a 3-6 C rise above ambient - well within industrial operating limits. For enclosed industrial cabinets above 60 C ambient, consider airflow or 2 oz copper pours on inner PCB layers for thermal margin.
Use a 4-layer PCB stackup with dedicated ground and power planes for noise-sensitive analog designs. Keep the 32.768 kHz RTC crystal traces short and surrounded by ground pour to avoid coupling noise into the RTC domain. The high-speed USB data lines (PA11/PA12) require 90-ohm differential impedance matching per USB 2.0 spec - follow USB-IF layout guidelines for trace length matching within 150 mil. Boot pins (BMS, JTAG) should have pull-up/pull-down resistors configurable via software.
Do not leave the ERASE pin floating - tie it to VDDIO through a 10 kOhm pull-up if not used for in-system programming. NRST must be pulled up externally with a 10 kOhm resistor and 100 nF capacitor for clean reset behavior. The QSPI pins are remapped on boot and may conflict with other peripherals - plan the boot configuration early. Flash write/erase operations require the supply voltage to remain above 2.7V; verify during brown-out scenarios.
Route JTAG/SWD signals (TMS, TCK, TDI, TDO, NRST) away from high-speed switching signals and noisy power traces. Maintain at least 3W spacing from clock traces to suppress crosstalk. The ADC analog inputs should be isolated from digital I/O with a ground moat, and the AVSS pin must connect to a clean analog ground. Decoupling for analog VDD pins (separate analog supply on SAM4S) requires 100 nF X7R plus 10 uF bulk capacitors placed within 5 mm of the supply pins.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - for automotive applications consider SAM4S automotive variants.
