ATSAML11D16A-MFT - 32MHz Cortex-M23 TrustZone MCU | Microchip
MPN: ATSAML11D16A-MFT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.61 | $36.10 |
| 100 | $3.18 | $318.00 |
| 500 | $2.84 | $1,420.00 |
| 1,000 | $2.51 | $2,510.00 |
ATSAML11D16A-MFT Overview
Drop-in alternatives for ATSAML11D16A-MFT 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 ATSAML11D16A-MFT (same form factor and footprint) β differing in Package, Operating Temperature, ADC, Core, Active Current.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAML10D16A-MFT
β Drop-Inβ In Stock
$1.7 / Unit
View Datasheet βATSAML11D14A-MUT
β Drop-Inβ In Stock
$1.62 / Unit
View Datasheet βATSAML10E16A-MFT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML10D15A-MFT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML10D16A-YFT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11D16A-MFT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (32-bit) |
| Operating Frequency | Up to 32 MHz |
| Program Memory (Flash) | 64 KB |
| SRAM | 16 KB |
| Supply Voltage | 1.62 V to 3.63 V |
| Active Current | <25 uA/MHz (typ, 3.3 V) |
| Sleep Current | <100 nA (typ, full RAM retention) |
| Operating Temperature | -40C to +125C (industrial) |
| Package | 24-pin VQFN (4x4 mm) |
| ADC | 12-bit, up to 1 Msps, 10 channels |
| Analog Comparators | 2 |
| SERCOM | 6 configurable (I2C/SPI/USART) |
| USB | Full-Speed USB Device |
| RTC | 32 kHz, calendar mode |
| Security | TrustZone-M, secure boot, AES/SHA/TRNG |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
ATSAML11D16A-MFT Pin Configuration
| Pin 1 | VDDIO β I/O supply voltage |
| Pin 2 | GND β Ground |
| Pin 3 | PA02 β GPIO / SERCOM0 PAD0 |
| Pin 4 | PA03 β GPIO / SERCOM0 PAD1 |
| Pin 5 | PA04 β GPIO / SERCOM0 PAD2 / ADC AIN4 |
| Pin 6 | PA05 β GPIO / SERCOM0 PAD3 / ADC AIN5 |
| Pin 7 | PA06 β GPIO / SERCOM1 PAD0 / ADC AIN6 |
| Pin 8 | PA07 β GPIO / SERCOM1 PAD1 / ADC AIN7 |
| Pin 9 | VDD β Core supply voltage |
| Pin 10 | PA08 β GPIO / SERCOM1 PAD2 / ADC AIN8 |
| Pin 11 | PA09 β GPIO / SERCOM1 PAD3 / ADC AIN9 |
| Pin 12 | PA10 β GPIO / SERCOM2 PAD0 |
| Pin 13 | PA11 β GPIO / SERCOM2 PAD1 |
| Pin 14 | PA14 β GPIO / SERCOM2 PAD2 |
| Pin 15 | PA15 β GPIO / SERCOM2 PAD3 |
| Pin 16 | PA16 β GPIO / SERCOM3 PAD0 / I2S FS |
| Pin 17 | PA17 β GPIO / SERCOM3 PAD1 / I2S SCK |
| Pin 18 | PA18 β GPIO / SERCOM3 PAD2 / I2S MCK |
| Pin 19 | PA19 β GPIO / SERCOM3 PAD3 / I2S SD |
| Pin 20 | RESET β Reset input, active-low |
| Pin 21 | SWDIO β Serial Wire Debug I/O |
| Pin 22 | SWCLK β Serial Wire Debug clock |
| Pin 23 | USB_DP β USB full-speed D+ |
| Pin 24 | USB_DM β USB full-speed D- |
Typical Applications
ATSAML11D16A-MFT is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Electricity Metering, Access Control and Secure Peripherals, Industrial Sensor Hubs, Battery-Powered Medical Wearables, USB HID and Consumer Devices.
Secure IoT Sensor Nodes
The ATSAML11D16A-MFT is a strong fit for secure IoT sensor nodes thanks to its Cortex-M23 core running at 32 MHz, hardware AES/SHA/TRNG, and TrustZone-M isolation. Its <25 uA/MHz active and <100 nA sleep currents let a battery-powered node stay in deep sleep for months, waking only on RTC or external interrupts to take an ADC reading, encrypt it with the on-chip AES accelerator, and transmit via a paired sub-GHz or BLE module. The 12-bit 1 Msps ADC and two analog comparators support direct connection to temperature, pressure, and current-sense transducers. Unlike a discrete crypto co-processor approach, the integrated TrustZone-M keeps the AES key in a secure region that the application firmware cannot read, dramatically reducing the risk of key exfiltration during a firmware update.
Recommended
Smart Electricity Metering
For single-phase smart electricity meters and submetering endpoints, the ATSAML11D16A-MFT delivers the deterministic Cortex-M23 compute needed to drive metrology algorithms while its secure boot ROM and TrustZone-M protect tamper-detection logic and calibration constants. The 24-pin VQFN (4x4 mm) keeps the metrology PCB compact, while the 12-bit 1 Msps ADC samples current and voltage channels simultaneously. The <100 nA sleep current with full SRAM retention allows the meter to retain logged intervals across power outages without draining the backup supercapacitor. Compared to a Cortex-M0+ metering MCU, the L11's M23 core offers 30 percent faster integer math and a hardware AES block that secures DLMS/COSEM or wireless M-Bus traffic with no CPU overhead.
Recommended
Access Control and Secure Peripherals
The ATSAML11D16A-MFT fits access-control readers, electronic locks, and secure HID peripherals where TrustZone-M isolates the credential-handling firmware from the application logic. The on-chip AES and TRNG accelerate OSDP, Wiegand-over-IP, and mobile-credential (BLE/NFC) handshakes, while the secure boot ROM prevents field-reprogramming of the lock firmware. The 24-pin VQFN (4x4 mm) footprint leaves room for the PCB antenna or NFC coil on a typical mullion-mount reader. Six SERCOM channels drive keypad, NFC, BLE module, and RS-485 simultaneously without external muxing. Compared to a Cortex-M4-based reader MCU, the L11 reduces active current by roughly 40 percent, critical for battery-backed or PoE-light door hardware.
Recommended
Industrial Sensor Hubs
Industrial sensor hubs that aggregate Modbus, IO-Link, or CANopen fieldbus data benefit from the ATSAML11D16A-MFT's six SERCOM channels and Cortex-M23 deterministic interrupt latency. The 125C industrial temperature rating (-MFT suffix) supports cabinet-free mounting next to motors and drives, while the 24-pin VQFN (4x4 mm) reduces PCB area versus 32- or 48-pin QFP alternatives. The on-chip 12-bit ADC handles analog sensor back-up channels when the hub loses digital link. TrustZone-M allows vendors to keep proprietary fieldbus protocol stacks in the secure partition while exposing only a documented API to user firmware, protecting IP without an external secure element.
Recommended
Battery-Powered Medical Wearables
Battery-powered medical wearables such as continuous glucose monitors, pulse oximeters, and adherence trackers fit the ATSAML11D16A-MFT's profile: <100 nA sleep current preserves coin-cell life for weeks, while the Cortex-M23 core processes sensor fusion and on-chip AES secures BLE-paired health data per HIPAA/FDA expectations. The 24-pin VQFN (4x4 mm) keeps the wearable BOM under 8x8 mm, and the 12-bit ADC directly digitizes PPG or bio-impedance electrodes. The -MFT industrial temperature rating supports skin-temperature ranges and storage above 60C. Compared to a Cortex-M0+ wearable MCU, the L11's TrustZone enables secure boot of the medical firmware while leaving room for an updatable application partition.
Recommended
USB HID and Consumer Devices
USB HID peripherals such as secure keyboards, programmable keypads, and authentication tokens benefit from the ATSAML11D16A-MFT's integrated full-speed USB device, on-chip AES, and TrustZone-M. The MCU enumerates as a HID composite device while keeping the encryption key and firmware signature in the secure partition, blocking logic-analyzer key extraction. The 24-pin VQFN (4x4 mm) supports compact dongle form factors, and the six SERCOM channels drive LED matrices, key-scanning GPIO, and an optional NFC link. Active current under 25 uA/MHz keeps USB suspend current comfortably under the 2.5 mA limit specified by USB 2.0, even with TrustZone firewall checks on every interrupt.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D16A-MFT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML10D16A-MFT | ATSAML11D14A-MUT | ATSAML10E16A-MFT | ATSAML10D15A-MFT | ATSAML10D16A-YFT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 24-pin VQFN (4x4 mm) | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| Max Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 64 KB | 64 KB | 16 KB (-75%) | 64 KB | 32 KB (-50%) | 64 KB |
| SRAM | 16 KB | 16 KB | 8 KB (-50%) | 16 KB | 8 KB (-50%) | 16 KB |
| TrustZone-M | Yes | No | Yes | No | No | No |
| Hardware Crypto (AES/SHA/TRNG) | Yes | No | Yes | No | No | No |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- TrustZone-M with secure boot and hardware crypto on-chip (vs ATSAML10D16A-MFT)
- 64 KB Flash with TrustZone preserved across pin-compatible siblings (vs ATSAML11D14A-MUT)
- Industrial 125C temperature grade (-MFT) versus 85C (-MUT) (vs ATSAML11D14A-MUT)
Design Notes
Estimated: at 32 MHz, VDD = 3.3 V, and Cortex-M23 core fully active, the ATSAML11D16A-MFT draws roughly 25 uA/MHz per the SAML11 family datasheet, or ~0.8 mA total. Adding USB active, ADC sampling, and SERCOM IO brings typical board-level current to 2-3 mA. For battery budgeting, the <100 nA sleep mode with full 16 KB SRAM retention is the headline figure, enabling coin-cell sensor nodes lasting years on a single CR2032 if wake intervals are kept above 30 seconds.
Place a 1 uF X7R decoupling capacitor within 3 mm of the VDD pin and a 100 nF X7R within 2 mm of the VDDIO pin to suppress switching noise from the internal DC-DC and LDO. The 24-pin VQFN (4x4 mm) package has an exposed pad that must be soldered to a continuous ground copper pour with at least 8 thermal vias for heat dissipation; skipping the EP soldering degrades theta_JA from 39 C/W to over 90 C/W and risks thermal shutdown during sustained ADC conversions.
TrustZone-M partition decisions made after the first firmware release cannot be undone without re-provisioning the secure key, which requires physical access to the chip's NVM and a factory-generated key. Plan the secure/non-secure address map in MPLAB Harmony 3 or Atmel START before any field deployment. Additionally, the SAML11 secure boot ROM verifies a signature on every boot - a misconfigured BOOTPROT setting bricks the part and requires a debugger to recover, so always enable rollback protection only after signing the golden image.
Compliance Information
RoHS and lead-free per Microchip product page. AEC-Q100 not qualified - the -MFT suffix is industrial temperature grade, not automotive qualification. For automotive applications, consult Microchip's automotive-grade SAM family.
