ATSAM4SD16CA-AN - 120MHz Cortex-M4 MCU, 1MB Flash | Microchip
MPN: ATSAM4SD16CA-AN β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.58 | $115.80 |
| 100 | $9.85 | $985.00 |
| 500 | $8.95 | $4,475.00 |
| 1,000 | $7.95 | $7,950.00 |
ATSAM4SD16CA-AN Overview
Key features include 2x512KB dual-bank Flash supporting safe in-application programming, a 16-bit ADC, 12-bit DAC, multiple UART/USART, SPI, I2C, USB 2.0 Full-Speed, CAN, and an External Bus Interface (EBI) for SRAM/NOR/NAND memories. The device also integrates a cryptographic accelerator and a true random number generator (TRNG), enabling hardware-accelerated AES, SHA, and secure key storage for IoT and connected-device designs. An Event System and Peripheral DMA Controller minimize CPU load by handling data movement autonomously.
The ATSAM4SD16CA-AN uses a Cortex-M4 core with single-precision floating-point unit and DSP extensions, achieving 1.25 DMIPS/MHz (Dhrystone 2.1) and supporting the full ARM Cortex Microcontroller Software Interface Standard (CMSIS). The 100-pin LQFP package exposes the full set of peripherals while remaining manufacturable with standard 4-layer PCB processes, making it well suited for prototyping through volume production.
Typical applications include industrial control and HMI, building automation, smart energy metering, USB peripherals, motor control (BLDC/PMSM), and connected IoT edge nodes with secure communications. The 120 MHz speed and DSP instructions also support audio processing, sensor fusion, and protocol stacks requiring real-time computation.
When designing with this part, allocate careful PCB real estate for decoupling: place 100 nF X7R capacitors near each VDD pin pair and a bulk 4.7 uF capacitor on the main 3.3V rail. The exposed-pad variant of LQFP must be soldered to a thermal pad for proper heat dissipation and ground integrity. Plan Flash bank layout carefully when implementing dual-bank firmware updates.
This page synthesizes distributor pricing, same-brand SAM4S family alternatives, and practical design guidance not found in the manufacturer datasheet, helping engineers shorten the design-in cycle for industrial-grade Cortex-M4 designs.
Drop-in alternatives for ATSAM4SD16CA-AN 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 ATSAM4SD16CA-AN (same form factor and footprint) β differing in Package, Flash Memory, SRAM, Core, Packaging.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAM4S16CA-AN
β Drop-Inβ In Stock
$2.61 / Unit
View Datasheet βATSAM4SA16CA-ANR
β Drop-Inβ In Stock
$5.38 / Unit
View Datasheet βATSAM4S8CA-AN
β Drop-Inπ Reference alternative (not in catalog)
ATSAM4S2CA-AN
β Drop-Inπ Reference alternative (not in catalog)
ATSAM4SD16CA-AN Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU and DSP |
| Core Size | 32-bit |
| Maximum Clock Speed | 120 MHz |
| Program Memory Size | 1 MB (1M x 8) Flash |
| RAM Size | 160 KB SRAM |
| Number of I/O | 79 |
| Supply Voltage (external) | 1.62 V to 3.6 V |
| Core Operating Voltage | 1.2 V (internal regulator) |
| Package | 100-LQFP (14x14 mm) |
| Connectivity | EBI/EMI, I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Data Converters | 12-bit ADC, 12-bit DAC |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
ATSAM4SD16CA-AN Pin Configuration
| Pin 1 | PD0 β General-purpose I/O / PWM |
| Pin 2 | PD1 β General-purpose I/O / PWM |
| Pin 3 | PD2 β General-purpose I/O / PWM |
| Pin 4 | PD3 β General-purpose I/O / PWM |
| Pin 5 | VDDOUT β Voltage regulator output (1.2V) |
| Pin 6 | VDDIN β Voltage regulator input (1.62-3.6V) |
| Pin 7 | GND β Ground |
| Pin 8 | VDDIO β I/O supply voltage |
| Pin 9 | PA0 β General-purpose I/O / ADC |
| Pin 10 | PA1 β General-purpose I/O / ADC |
| Pin 11 | PA2 β General-purpose I/O / ADC |
| Pin 12 | PA3 β General-purpose I/O / ADC |
| Pin 13 | PA4 β General-purpose I/O / ADC |
| Pin 14 | PA5 β General-purpose I/O / ADC |
| Pin 15 | PA6 β General-purpose I/O / ADC |
| Pin 16 | PA7 β General-purpose I/O / ADC |
| Pin 17 | PA8 β General-purpose I/O / PWM |
| Pin 18 | PA9 β General-purpose I/O / PWM |
| Pin 19 | PA10 β General-purpose I/O / PWM |
| Pin 20 | PA11 β General-purpose I/O / PWM |
| Pin 21 | PA12 β General-purpose I/O / PWM |
| Pin 22 | PA13 β General-purpose I/O / PWM |
| Pin 23 | PA14 β General-purpose I/O / PWM |
| Pin 24 | PA15 β General-purpose I/O / PWM |
| Pin 25 | PB0 β General-purpose I/O |
| Pin 26 | PB1 β General-purpose I/O |
| Pin 27 | PB2 β General-purpose I/O |
| Pin 28 | PB3 β General-purpose I/O |
| Pin 29 | PB4 β General-purpose I/O |
| Pin 30 | PB5 β General-purpose I/O |
| Pin 31 | PB6 β General-purpose I/O |
| Pin 32 | PB7 β General-purpose I/O |
| Pin 33 | PB8 β General-purpose I/O |
| Pin 34 | PB9 β General-purpose I/O |
| Pin 35 | PB10 β General-purpose I/O |
| Pin 36 | PB11 β General-purpose I/O |
| Pin 37 | PB12 β General-purpose I/O |
| Pin 38 | PB13 β General-purpose I/O |
| Pin 39 | PB14 β General-purpose I/O |
| Pin 40 | PB15 β General-purpose I/O |
| Pin 41 | PC0 β General-purpose I/O / EBI |
| Pin 42 | PC1 β General-purpose I/O / EBI |
| Pin 43 | PC2 β General-purpose I/O / EBI |
| Pin 44 | PC3 β General-purpose I/O / EBI |
| Pin 45 | PC4 β General-purpose I/O / EBI |
| Pin 46 | PC5 β General-purpose I/O / EBI |
| Pin 47 | PC6 β General-purpose I/O / EBI |
| Pin 48 | PC7 β General-purpose I/O / EBI |
| Pin 49 | PC8 β General-purpose I/O / EBI |
| Pin 50 | PC9 β General-purpose I/O / EBI |
| Pin 51 | PC10 β General-purpose I/O / EBI |
| Pin 52 | PC11 β General-purpose I/O / EBI |
| Pin 53 | PC12 β General-purpose I/O / EBI |
| Pin 54 | PC13 β General-purpose I/O / EBI |
| Pin 55 | PC14 β General-purpose I/O / EBI |
| Pin 56 | PC15 β General-purpose I/O / EBI |
| Pin 57 | PC16 β General-purpose I/O / EBI |
| Pin 58 | PC17 β General-purpose I/O / EBI |
| Pin 59 | PC18 β General-purpose I/O / EBI |
| Pin 60 | PC19 β General-purpose I/O / EBI |
| Pin 61 | PC20 β General-purpose I/O / EBI |
| Pin 62 | PC21 β General-purpose I/O / EBI |
| Pin 63 | PC22 β General-purpose I/O / EBI |
| Pin 64 | PC23 β General-purpose I/O / EBI |
| Pin 65 | PD4 β General-purpose I/O / PWM |
| Pin 66 | PD5 β General-purpose I/O / PWM |
| Pin 67 | PD6 β General-purpose I/O / PWM |
| Pin 68 | PD7 β General-purpose I/O / PWM |
| Pin 69 | PD8 β General-purpose I/O / PWM |
| Pin 70 | PD9 β General-purpose I/O / PWM |
| Pin 71 | PD10 β General-purpose I/O / PWM |
| Pin 72 | PD11 β General-purpose I/O / PWM |
| Pin 73 | PD12 β General-purpose I/O / PWM |
| Pin 74 | PD13 β General-purpose I/O / PWM |
| Pin 75 | PD14 β General-purpose I/O / PWM |
| Pin 76 | PD15 β General-purpose I/O / PWM |
| Pin 77 | PD16 β General-purpose I/O / PWM |
| Pin 78 | PD17 β General-purpose I/O / PWM |
| Pin 79 | PD18 β General-purpose I/O / PWM |
| Pin 80 | PD19 β General-purpose I/O / PWM |
| Pin 81 | PD20 β General-purpose I/O / PWM |
| Pin 82 | PD21 β General-purpose I/O / PWM |
| Pin 83 | PD22 β General-purpose I/O / PWM |
| Pin 84 | PD23 β General-purpose I/O / PWM |
| Pin 85 | PD24 β General-purpose I/O / PWM |
| Pin 86 | PD25 β General-purpose I/O / PWM |
| Pin 87 | PD26 β General-purpose I/O / PWM |
| Pin 88 | PD27 β General-purpose I/O / PWM |
| Pin 89 | PD28 β General-purpose I/O / PWM |
| Pin 90 | PD29 β General-purpose I/O / PWM |
| Pin 91 | PD30 β General-purpose I/O / PWM |
| Pin 92 | PD31 β General-purpose I/O / PWM |
| Pin 93 | PA16 β General-purpose I/O |
| Pin 94 | PA17 β General-purpose I/O |
| Pin 95 | PA18 β General-purpose I/O / XOUT |
| Pin 96 | PA19 β General-purpose I/O / XIN |
| Pin 97 | NRST β Reset (active low) |
| Pin 98 | TDI β JTAG Test Data In |
| Pin 99 | TMS β JTAG Test Mode Select |
| Pin 100 | TCK β JTAG Test Clock |
Typical Applications
ATSAM4SD16CA-AN is suitable for 6 applications: Industrial Control and HMI, Smart Energy Metering, USB Peripherals and HID Devices, Motor Control (BLDC / PMSM), Building Automation Controllers, Connected IoT Edge Nodes.
Industrial Control and HMI
The ATSAM4SD16CA-AN's 120 MHz Cortex-M4 core with FPU and DSP instructions handles real-time PID loops, machine vision pre-processing, and multi-axis motor coordination in industrial PLCs and CNC machines. Its 1 MB dual-bank Flash supports complex ladder-logic or IEC 61131-3 runtimes, while 160 KB SRAM holds sensor data buffers without external memory. The wide 1.62-3.6V supply and -40C to +85C industrial grade allow deployment in factory cabinets. USB Full-Speed and CAN connectivity integrate with operator panels and industrial fieldbuses. Hardware AES/SHA/TRNG accelerates secure OPC UA or Modbus-TCP communications.
Recommended
Smart Energy Metering
In single- and three-phase smart meters, the ATSAM4SD16CA-AN provides the computational throughput for real-time FFT-based harmonic analysis, metrology algorithms, and tamper detection. Its 12-bit ADC with up to 24 channels digitizes voltage and current CT/ shunt inputs simultaneously with DMA-driven sampling. The hardware cryptographic engine accelerates DLMS/COSEM and TLS 1.2 sessions for AMI backhaul, while the dual-bank Flash supports secure OTA firmware updates mandated by utility regulations. The wide -40C to +85C operating range covers outdoor meter enclosures.
Recommended
USB Peripherals and HID Devices
The ATSAM4SD16CA-AN integrates a USB 2.0 Full-Speed device/host controller with on-chip transceiver, eliminating external PHY cost in HID input devices, POS terminals, and USB measurement instruments. The 160 KB SRAM holds USB descriptor stacks plus application buffers; 1 MB Flash supports multi-page USB bootloader and composite device firmware. Up to 79 I/O accommodate matrix key-scans, indicator LEDs, and auxiliary UART/SPI sensors. The Cortex-M4 FPU speeds HID descriptor parsing and custom protocol stacks.
Recommended
Motor Control (BLDC / PMSM)
Field-oriented control (FOC) of three-phase BLDC and PMSM motors demands deterministic PWM timing and fast current-loop math. The ATSAM4SD16CA-AN delivers this through its 16-bit PWM controller with hardware dead-time insertion, 12-bit ADC synchronized to PWM edges, and Cortex-M4 DSP instructions running Clarke/Park transforms and SVPWM at full 120 MHz. Hardware Q31 math eliminates fixed-point overflow risk. The Event System routes ADC end-of-conversion to DMA for jitter-free sampling, while CAN and UART provide the industrial feedback channel for servo drives.
Recommended
Building Automation Controllers
Building automation hubs (BACnet, KNX, DALI gateways) run multiple protocol stacks simultaneously while serving touch-screen HMI and cloud uplinks. The ATSAM4SD16CA-AN's 1 MB Flash stores BACnet/KNX/DALI stacks plus application logic, while 160 KB SRAM holds TCP/TLS buffers for cloud MQTT connections. Dual-bank Flash enables fail-safe OTA upgrades critical for deployed building systems. RS-485 UART, CAN, and SPI peripherals connect to sensor networks; the hardware AES engine secures TLS sessions to cloud services.
Recommended
Connected IoT Edge Nodes
Edge IoT devices running TensorFlow Lite Micro, CMSIS-NN, or custom sensor-fusion models benefit from the ATSAM4SD16CA-AN's Cortex-M4 DSP instructions and FPU, which accelerate inference at 120 MHz. The hardware AES/SHA/TRNG secures TLS 1.3 handshakes to cloud platforms, while 1 MB dual-bank Flash supports signed OTA updates for fleet management. Low-power SleepWalking peripherals allow battery-powered sensor nodes; the 79 I/O lines accommodate multi-sensor fusion boards. SPI and I2C interfaces connect to MEMS accelerometers, environmental sensors, and BLE/WiFi companion modules.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SD16CA-AN β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4S16CA-AN | ATSAM4SA16CA-AN | ATSAM4S8CA-AN | ATSAM4S2CA-AN |
|---|---|---|---|---|---|
| Package | 100-LQFP (14x14 mm) | 100-LQFP - same | 100-LQFP - same | 100-LQFP - same | 100-LQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz |
| Flash | 1 MB dual-bank | 1 MB single-bank | 1 MB | 512 KB | 128 KB |
| SRAM | 160 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| Cryptographic Accelerator | Yes (AES/SHA/TRNG) | Yes (AES/SHA/TRNG) | No | Yes (AES/SHA/TRNG) | Yes (AES/SHA/TRNG) |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| 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 | 1.62 V to 3.6 V |
| Approx. Qty-1000 Price | $7.95 | $7.20 | $7.40 | $6.10 | $5.40 |
Key Differentiators
- Largest SRAM in SAM4S family (vs ATSAM4S16CA-AN)
- Dual-bank Flash for safe OTA updates (vs ATSAM4SA16CA-AN)
- Best price/performance for 1 MB Flash tier (vs ATSAM4S16CA-AN)
Design Notes
Place a 100 nF X7R 0402 decoupling capacitor within 2 mm of every VDDIO/VDDIN pin pair. Add a single 4.7 uF X5R bulk capacitor on the main 3.3V rail near the VDDIN pin. The 32.768 kHz low-frequency crystal (XIN/XOUT, pins 95-96) requires a load capacitor pair matched to the crystal's CL specification (typically 12-18 pF); keep traces short and guard the crystal with a ground ring to reduce EMI.
At full 120 MHz operation with all peripherals active, the ATSAM4SD16CA-AN typically dissipates ~150 mW. The 100-LQFP package has theta_JA of approximately 50 C/W, yielding a 7.5 C rise above ambient - well within the -40C to +85C industrial range. Estimated: at ambient 70 C the junction reaches ~78 C. For high-temperature environments above 70 C ambient, add thermal vias under the center pad ground connection.
The ATSAM4SD16CA-AN's NRST pin (pin 97) is bidirectional; in noisy environments add an external 10 kohm pull-up and 100 nF capacitor to ground for a robust reset. Do not enable the USB controller without first configuring the 3.3V USB transceiver supply (UVBUS pin) - leaving it floating can cause latch-up. When using dual-bank Flash for IAP, ensure your linker script places the bootloader in bank 0 with a lockable write-protect region.
Compliance Information
RoHS compliant and lead-free per Microchip product page. Industrial temperature grade (-40C to +85C). MSL Level 3 - moisture handling required per IPC/JEDEC J-STD-033 after opening MBB. Not AEC-Q100 qualified; for automotive designs use ATSAM4S46C44 or SAM V71 family.
