ATSAM4SD16CA-ANR - 1MB Cortex-M4 MCU, 120MHz, LQFP-100 | Microchip
MPN: ATSAM4SD16CA-ANR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.2 | $11.20 |
| 10 | $10.08 | $100.80 |
| 100 | $8.96 | $896.00 |
| 500 | $7.84 | $3,920.00 |
| 1,000 | $6.72 | $6,720.00 |
ATSAM4SD16CA-ANR Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), and a rich set of peripherals such as timers, communication interfaces, and analog blocks. Cortex-M4 devices specifically add a single-precision floating-point unit (FPU) and DSP extensions, making them well-suited for signal processing. Positioned within the broader hierarchy, a Cortex-M4 MCU belongs to the ARM Cortex-M family -> 32-bit microcontroller -> embedded processor -> semiconductor IC. The SAM4S family from Microchip targets industrial, consumer, and connectivity-driven embedded applications.
Key features include dual-bank Flash architecture for live firmware updates, a full-speed USB 2.0 Device port with embedded transceiver, up to 16 peripheral DMA channels, and a flexible Static Memory Controller that supports SRAM, NOR Flash, and NAND Flash. The device operates from 1.62V to 3.6V, includes a 12-bit ADC, a 12-bit DAC, and multiple serial interfaces including USART, SPI, and TWI (I2C-compatible).
Architecturally, the SAM4SD16 is built on a Harvard-bus design with separate instruction and data buses, a 3-stage pipeline, and an MPU for memory protection. The Cortex-M4 core delivers 1.25 DMIPS/MHz with hardware single-cycle MAC and SIMD instructions, enabling efficient DSP workloads such as motor control and audio processing. The dual-bank Flash enables in-application programming without halting code execution.
Typical applications include industrial control and HMI panels, USB peripherals and smart-card readers, motor control (BLDC and stepper), building automation gateways, and portable data-acquisition devices. The high SRAM-to-Flash ratio and DMA-rich peripheral set also make it a fit for protocol bridges and gateway designs.
Design consideration: the LQFP-100 package's exposed thermal pad is recommended for solder-joint reliability, even though the device does not generate significant heat. Decoupling must include a 100nF ceramic on each VDD pin and a bulk 4.7uF near the regulator output.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, helping engineers compare the ATSAM4SD16CA-ANR with same-family variants and cross-brand alternatives in a single view.
Drop-in alternatives for ATSAM4SD16CA-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 ATSAM4SD16CA-ANR (same form factor and footprint) — differing in ADC, Package, Operating Temperature, RoHS Status, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4SD16CA-AUR
✅ Drop-In✓ In Stock
$7.49 / Unit
View Datasheet →ATSAM4SD16CA-CU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.2 / Unit
View Datasheet →ATSAM4SD16CA-AN
✅ Drop-In✓ In Stock
$7.95 / Unit
View Datasheet →ATSAM4S16CA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.55 / Unit
View Datasheet →ATSAM4SA16CA-AUR
✅ Drop-In✓ In Stock
$6.23 / Unit
View Datasheet →ATSAM4SD16CA-ANR Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4 with FPU |
| CPU Bit Width | 32-bit |
| Maximum CPU Clock | 120 MHz |
| Flash Memory | 1024 KB (1 MB) |
| SRAM | 160 KB |
| Operating Voltage Range | 1.62 V to 3.6 V |
| Package | 100-pin LQFP (LFQFP) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel |
| Temperature Grade | Industrial |
| USB Interface | USB 2.0 Full-Speed Device with embedded transceiver |
| ADC | 12-bit |
| DAC | 12-bit |
| DMA Channels | Up to 16 |
| RoHS Status | Compliant |
ATSAM4SD16CA-ANR Pin Configuration
| Pin 1 | PD0 — General-purpose I/O / PWM (also NPCS1) |
| Pin 2 | PD1 — General-purpose I/O / PWM |
| Pin 3 | PD2 — General-purpose I/O / URXD1 |
| Pin 4 | PD3 — General-purpose I/O / UTXD1 |
| Pin 5 | VDDOUT — Voltage Regulator Output (1.8V core supply) |
| Pin 6 | VDDIN — Voltage Regulator Input (1.62-3.6V) |
| Pin 7 | GND — Ground |
| Pin 8 | VDDIO — I/O Supply Voltage |
| Pin 9 | XIN — Crystal Oscillator Input (3-20 MHz) |
| Pin 10 | XOUT — Crystal Oscillator Output |
| Pin 11 | NRST — External Reset Input (active-low) |
| Pin 12 | PA0 — GPIO / WKUP0 / PWM |
| Pin 13 | PA1 — GPIO / WKUP1 / PWM |
| Pin 14 | PA2 — GPIO / WKUP2 / PWM |
| Pin 15 | PA3 — GPIO / WKUP3 / PWM |
| Pin 16 | PA4 — GPIO / WKUP4 / PWM |
| Pin 17 | PA5 — GPIO / PWM |
| Pin 18 | PA6 — GPIO / PWM |
| Pin 19 | PA7 — GPIO / PWM |
| Pin 20 | VDDCORE — Core Supply Voltage (1.2V regulated) |
| Pin 21 | GND — Ground |
| Pin 22 | PA8 — GPIO / PWM |
| Pin 23 | PA9 — GPIO / URXD0 |
| Pin 24 | PA10 — GPIO / UTXD0 |
| Pin 25 | PA11 — GPIO / NPCS0 / PWM |
| Pin 26 | PA12 — GPIO / MISO / PWM |
| Pin 27 | PA13 — GPIO / MOSI / PWM |
| Pin 28 | PA14 — GPIO / SPCK / PWM |
| Pin 29 | PA15 — GPIO / PWM |
| Pin 30 | PA16 — GPIO / PWM |
| Pin 31 | PA17 — GPIO / PWM |
| Pin 32 | PA18 — GPIO / PWM |
| Pin 33 | PA19 — GPIO / PWM |
| Pin 34 | PA20 — GPIO / PWM |
| Pin 35 | VDDIO — I/O Supply Voltage |
| Pin 36 | GND — Ground |
| Pin 37 | PB0 — GPIO / PWM |
| Pin 38 | PB1 — GPIO / PWM |
| Pin 39 | PB2 — GPIO / TWD (I2C data) |
| Pin 40 | PB3 — GPIO / TWCK (I2C clock) |
| Pin 41 | PB4 — GPIO / PWM |
| Pin 42 | PB5 — GPIO / PWM |
| Pin 43 | PB6 — GPIO / PWM |
| Pin 44 | PB7 — GPIO / PWM |
| Pin 45 | PB8 — GPIO / PWM |
| Pin 46 | PB9 — GPIO / PWM |
| Pin 47 | PB10 — GPIO / PWM |
| Pin 48 | PB11 — GPIO / PWM |
| Pin 49 | PB12 — GPIO / PWM |
| Pin 50 | PB13 — GPIO / PWM |
| Pin 51 | PB14 — GPIO / PWM |
| Pin 52 | PB15 — GPIO / PWM |
| Pin 53 | PB16 — GPIO / PWM |
| Pin 54 | PB17 — GPIO / PWM |
| Pin 55 | PB18 — GPIO / PWM |
| Pin 56 | VDDIO — I/O Supply Voltage |
| Pin 57 | GND — Ground |
| Pin 58 | PC0 — GPIO / AD0 (ADC input) |
| Pin 59 | PC1 — GPIO / AD1 (ADC input) |
| Pin 60 | PC2 — GPIO / AD2 (ADC input) |
| Pin 61 | PC3 — GPIO / AD3 (ADC input) |
| Pin 62 | PC4 — GPIO / AD4 (PWM) |
| Pin 63 | PC5 — GPIO / AD5 (PWM) |
| Pin 64 | PC6 — GPIO / AD6 (PWM) |
| Pin 65 | PC7 — GPIO / AD7 (PWM) |
| Pin 66 | PC8 — GPIO / AD8 (PWM) |
| Pin 67 | PC9 — GPIO / AD9 (PWM) |
| Pin 68 | PC10 — GPIO / AD10 (PWM) |
| Pin 69 | PC11 — GPIO / AD11 (PWM) |
| Pin 72 | PC12 — GPIO / AD12 (PWM) |
| Pin 73 | PC13 — GPIO / AD13 (PWM) |
| Pin 74 | PC14 — GPIO / AD14 (PWM) |
| Pin 75 | PC15 — GPIO / AD15 (PWM) |
| Pin 76 | PC16 — GPIO / PWM |
| Pin 77 | PC17 — GPIO / PWM |
| Pin 78 | PC18 — GPIO / PWM |
| Pin 79 | PC19 — GPIO / PWM |
| Pin 80 | PC20 — GPIO / PWM |
| Pin 81 | PC21 — GPIO / PWM |
| Pin 82 | PC22 — GPIO / PWM |
| Pin 83 | PC23 — GPIO / PWM |
| Pin 84 | VDDIO — I/O Supply Voltage |
| Pin 85 | GND — Ground |
| Pin 86 | DM — USB Data Minus |
| Pin 87 | DP — USB Data Plus |
| Pin 88 | VDDIO — I/O Supply Voltage |
| Pin 89 | VDDUTMI — USB UTMI Transceiver Supply (3.3V) |
| Pin 90 | GND — Ground |
| Pin 91 | TCK / SWCLK — JTAG Test Clock / SWD Clock |
| Pin 92 | TMS / SWDIO — JTAG Test Mode Select / SWD Data |
| Pin 93 | TDO / SWO — JTAG Test Data Out / SWD Trace |
| Pin 94 | TDI — JTAG Test Data In |
| Pin 95 | ERASE — Flash Erase (active-high) |
| Pin 96 | PE0 — GPIO / SCL (TWI clock) |
| Pin 97 | PE1 — GPIO / SDA (TWI data) |
| Pin 98 | PE2 — GPIO |
| Pin 99 | PE3 — GPIO |
| Pin 100 | PE4 — GPIO |
| Pin 101 | GND (Thermal Pad) — Exposed thermal pad - must be soldered to PCB ground plane |
Typical Applications
ATSAM4SD16CA-ANR is suitable for 6 applications: USB Peripherals and Smart Card Readers, Industrial HMI and Control Panels, Motor Control and BLDC Drives, Building Automation Gateways, Portable Data Acquisition Systems, Smart Card and Secure Token Readers.
USB Peripherals and Smart Card Readers
The ATSAM4SD16CA-ANR is purpose-built for USB peripheral applications because it integrates a full-speed USB 2.0 Device port with on-chip transceiver, eliminating the need for an external PHY. The 1MB dual-bank Flash supports USB bootloader (DFU) and application code with room for vendor-specific descriptors. The 120 MHz Cortex-M4 core handles USB stack processing and HID/CDC/CCID class protocols without DMA bottlenecks. Placed as the main MCU with 22 ohm series resistors on DP/DM lines and a 1uF VBUS decoupling capacitor, the device delivers a production-ready USB device solution for card readers, barcode scanners, and HID peripherals.
Recommended
Industrial HMI and Control Panels
The ATSAM4SD16CA-ANR fits industrial HMI applications through its 120 MHz Cortex-M4 with FPU, 160KB SRAM for graphics framebuffer, and 12-bit ADC for touch-screen and analog sensing. The dual-bank Flash enables secure firmware updates in the field without halting operation - critical for industrial panels that cannot tolerate downtime. With DMA channels supporting TFT LCD data transfer and timers for backlight PWM, the device drives QVGA/WQVGA displays and manages UART-based PLC comms. Industrial temperature grade (-40C to +85C) and 1.62V-3.6V operation support 24V industrial bus systems with appropriate front-end regulation.
Recommended
Motor Control and BLDC Drives
The ATSAM4SD16CA-ANR's Cortex-M4 with hardware FPU executes field-oriented control (FOC) loops for BLDC and PMSM motors in real time at the 120 MHz clock rate. The TC (Timer Counter) modules generate 3-phase complementary PWM with dead-time insertion for inverter bridges, while the 12-bit ADC samples phase currents synchronously to PWM edges via hardware triggering. The 160KB SRAM holds full state-space observer variables and PI controller coefficients without external memory. With 1MB Flash, complete motor libraries and CANopen/Modbus stacks fit on-chip, simplifying BOM and improving reliability.
Recommended
Building Automation Gateways
The ATSAM4SD16CA-ANR serves as a building-automation gateway MCU due to its rich peripheral mix: multiple USARTs for RS-485 Modbus trunks, TWI for I2C sensors, SPI for LoRa/WiFi modules, and USB for commissioning. The 160KB SRAM buffers data from multiple sensor buses before forwarding via Ethernet or cellular modules. The Cortex-M4 FPU accelerates AES encryption for secure MQTT/HTTPS communication with cloud backends. Industrial temperature rating and 1.62V-3.6V range suit DIN-rail enclosures powered by 24V industrial supplies.
Recommended
Portable Data Acquisition Systems
The ATSAM4SD16CA-ANR's low 1.62V minimum supply and efficient Cortex-M4 core support battery-powered data loggers for portable measurement. The 12-bit ADC samples up to 1 MSPS with DMA burst transfer into SRAM, enabling continuous logging of vibration, strain-gauge, or biomedical signals. The 1MB Flash stores days of compressed data without external memory, while USB powers and recharges the system when docked. Industrial temperature range and robust LQFP-100 package suit handheld test equipment used in field service environments.
Recommended
Smart Card and Secure Token Readers
The ATSAM4SD16CA-ANR supports smart-card reader designs through its USART configurable for ISO 7816 T=0/T=1 protocols, integrated USB for host connectivity, and DMA channels for high-speed card data transfer. The 160KB SRAM handles secure protocol buffers, while the 1MB Flash stores firmware-update images plus crypto libraries. Hardware single-cycle MAC instructions accelerate AES and DES operations needed for payment terminal security. The Cortex-M4 MPU enforces memory isolation between application and crypto firmware regions for PCI-PTS compliance.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SD16CA-ANR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SD16CA-AUR | ATSAM4SD16CA-CU | ATSAM4SD16CA-AN | ATSAM4S16CA-AU | ATSAM4SA16CA-AUR |
|---|---|---|---|---|---|---|
| Package | LQFP-100 | LQFP-100 (same) | LQFP-100 (same) | LQFP-100 (same) | LQFP-100 (same) | LQFP-100 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 1 MB | 1 MB | 1 MB | 1 MB | 512 KB (-50%) | 1 MB |
| SRAM | 160 KB | 160 KB | 160 KB | 160 KB | 128 KB | 160 KB |
| CPU Clock | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
| USB 2.0 Full-Speed | Yes (embedded transceiver) | Yes | Yes | Yes | Yes | No |
| Packaging | Tape & Reel | Tray | Tray | Tray | Tray | Tray |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial | Industrial | Industrial |
Key Differentiators
- Integrated USB 2.0 Full-Speed Device transceiver (vs ATSAM4SA16CA-AUR)
- Dual-bank Flash architecture (vs ATSAM4S16CA-AU)
- Same die across multiple packaging options (vs ATSAM4S16CA-AU)
Design Notes
The ATSAM4SD16CA-ANR integrates a 1.2V core voltage regulator powered by VDDIN (1.62V-3.6V). Place a 4.7uF bulk capacitor on VDDIN and a 1uF ceramic on VDDCORE. For USB applications, VDDUTMI must be supplied from the same 3.3V rail with a separate 100nF decoupling capacitor. Verify the regulator output voltage on VDDCORE during design validation - undersized decoupling causes core instability and USB enumeration failures.
Route the 50 MHz external crystal traces on the XIN/XOUT pins with symmetric length matching and a ground guard ring. Place the load capacitors (typically 12-22pF depending on crystal ESR) as close to the oscillator pins as possible. Keep the USB DP/DM traces impedance-controlled to 90 ohms differential per USB 2.0 specification. Maintain a continuous ground plane under the LQFP-100 thermal pad for thermal dissipation and electrical reference.
A common pitfall is failing to connect the NRST pin to a proper reset circuit - leaving NRST floating leads to intermittent reset behavior during power-up. Use a 10 kohm pull-up to VDDIO and a 100nF capacitor to ground. The ERASE pin (pin 95) must be pulled low or left NC - driving it high forces a full Flash erase and lockout of the device until next reset. For JTAG/SWD debugging, ensure the SWD pins are accessible via test points for production programming.
Compliance Information
Industrial temperature grade (-40C to +85C). Compliant with RoHS Directive 2011/65/EU and REACH SVHC requirements per Microchip product declaration. Not AEC-Q100 qualified - for automotive applications, contact Microchip for AEC-Q100 qualified SAM4S variants.
