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Microchip Technology ATSAMB11G18A-MU-T
- Part No.:
- ATSAMB11G18A-MU-T
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ATSAMB11G18A-MU-T.pdf
- Description:
- IC RF TXRX+MCU BLE 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,488
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Product details
Overview
ATSAMB11G18A-MU-T from Microchip Technology (formerly Atmel) is an ultra-low-power Bluetooth 4.1 System-on-Chip integrating ARM Cortex-M0 MCU, 2.4GHz BLE transceiver, integrated PA and TR switch, 256kB stacked Flash, 128kB RAM, and full PMU with buck DC/DC converter. It delivers -95dBm RX sensitivity, +3.5dBm TX output, and 1.1µA sleep current with 8KB RAM retention - deployed in battery-powered wearable health monitors and industrial sensor nodes.
For engineers reviewing the ATSAMB11G18A-MU-T datasheet, ATSAMB11G18A-MU-T pinout, ATSAMB11G18A-MU-T application, or ATSAMB11G18A-MU-T equivalent, key selection criteria include BLE 4.1 stack certification (QD ID D028678/D028679), QFN-48 6×6mm package with exposed thermal pad, integrated 32.768kHz RTC oscillator support, and hardware AES-128/SHA-256 accelerators for secure over-the-air updates.
Technical Context
The ATSAMB11G18A-MU-T implements a single-chip BLE 4.1 solution where the ARM Cortex-M0 core executes application firmware while the dedicated BLE subsystem handles link-layer timing, packet encryption, and radio control - all coordinated via shared memory and hardware semaphores. The transceiver uses direct-conversion architecture with integrated T/R switch and single-wire antenna interface.
Its power architecture combines a fully integrated buck DC/DC converter (2.3–4.3V input, 1.2V output) with separate LDOs and programmable power domains: always-on wake-up GPIOs, switchable low-power I/O banks, and RF/AMS analog supplies. Sleep states are managed by hardware timers and RTC with sub-µA leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BLE Standard | BLE 4.1 certified (QD ID D028678 controller, D028679 host); supports GAP, GATT, ATT, SM, L2CAP |
| Receiver Sensitivity | -95dBm at 1Mbps (programmable down to -93dBm); enables robust reception in noisy industrial environments |
| Transmit Output Power | Programmable from -20dBm to +3.5dBm in 1dB steps; balances range vs. battery life in compact IoT nodes |
| Memory | 256kB stacked Flash (code storage), 128kB RAM (96kB user-accessible), 128kB ROM (BLE stack) |
| Sleep Current | 1.1µA with 8KB RAM retention + RTC running; supports multi-year operation on CR2032 coin cell |
| CPU Core | ARM Cortex-M0 @ up to 48MHz; supports real-time sensor fusion and local BLE profile processing |
| Security | Hardware AES-128 and SHA-256 accelerators; offloads crypto from CPU to preserve low-power operation |
| Operating Voltage | 2.3V–4.3V VBATT; eliminates need for external regulators in single-cell Li-ion or alkaline designs |
Pinout & Package
ATSAMB11G18A-MU-T is housed in a RoHS-compliant 6×6mm QFN-48 package with 0.4mm pitch and exposed thermal pad (4.2×4.2mm) requiring PCB ground connection. Package thickness is 0.85mm ±0.1mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_VCO / VDD_RF / VDD_AMS / VDD_SXDIG | Analog/RF supply rails | Four independent 1.2V analog supplies for VCO, RF core, AMS, and SX digital blocks - decoupling critical for BLE RF stability |
| RFIO | Single-wire RF I/O | Integrated T/R switch enables direct connection to chip antenna or matching network without external switches |
| CHIP_EN | Master enable input | Hardware-controlled PMU activation; must be high after VDDIO stable to exit Power_Down state |
| RTC_CLK_P / RTC_CLK_N | 32.768kHz crystal interface | Dedicated differential RTC oscillator pins supporting CL=7pF crystals for accurate timekeeping in sleep mode |
| LP_GPIO_0–LP_GPIO_23 / AO_GPIO_0–AO_GPIO_2 | Programmable I/O banks | 23 low-power GPIOs (96kΩ pull-up/down) + 3 always-on wake-up pins; retain configuration across sleep cycles |
| XO_P / XO_N | 26MHz crystal interface | Differential crystal input for main system clock; supports high-accuracy timing for BLE advertising intervals |
| VBATT_BUCK / VSW / VDDC_PD4 | DC/DC converter terminals | Accepts 2.3–4.3V input; requires external 4.7µH inductor and 4.7µF capacitor for 1.2V core supply |
Key Features
| Feature | Design Value |
|---|---|
| Integrated BLE 4.1 Stack | Firmware-resident protocol stack in ROM includes Proximity, Heart Rate, Thermometer, and Blood Pressure profiles - no external host required |
| Ultra-Low-Power Architecture | 1.1µA sleep current with RTC + 8KB RAM retention enables >5-year battery life in beacon-class deployments |
| Hardware Security Acceleration | AES-128 and SHA-256 engines reduce firmware overhead and prevent side-channel attacks during OTA firmware updates |
| Flexible Peripheral Set | 2× UART, 2× SPI, 2× I²C (1× slave-only), 4× PWM, 3× GP timers, quadrature decoder, and 4-channel 11-bit ADC - supports sensor hub integration |
| Single-Wire Debug (SWD) | SWDCLK/SWDIO on LP_GPIO_0/LP_GPIO_1 enables in-circuit debugging without dedicated debug header footprint |
| Power Management Unit | Integrated buck DC/DC converter eliminates external regulator; supports dynamic voltage scaling and domain isolation for mixed-signal operation |
Applications
| Wearable Health Monitor | Industrial Wireless Sensor Node |
|---|---|
Use Scenario: Continuous ECG and SpO₂ monitoring in wrist-worn devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: ATSAMB11G18A-MU-T serves as standalone BLE sensor hub - acquiring analog signals via ADC, executing signal processing on Cortex-M0, and transmitting encrypted health data via BLE 4.1. Use Value: 1.1µA sleep current with RTC and 8KB RAM retention enables >3-year operation on CR2032; integrated AES-128 secures PHI transmission per HIPAA guidelines. |
Use Scenario: Battery-operated temperature/humidity/pressure sensing in factory-floor machinery with 10+ year deployment life. IC Role / Device Role / Timing Role: ATSAMB11G18A-MU-T acts as autonomous edge node - reading sensors via I²C/SPI, logging data locally in Flash, and broadcasting alerts via BLE advertising packets. Use Value: -95dBm RX sensitivity ensures reliable reception in electrically noisy industrial settings; 2.3–4.3V VBATT range supports primary lithium (3.6V) or dual-alkaline (3.0V) sources without regulation. |
| Smart Home Beacon | Asset Tracking Tag |
Use Scenario: Location-aware retail beacon emitting iBeacon/Eddystone frames in shopping malls with minimal maintenance. IC Role / Device Role / Timing Role: ATSAMB11G18A-MU-T functions as self-contained advertising engine - generating timed BLE packets using hardware timers and RTC, with no external microcontroller. Use Value: Average advertising current of 9.7µA (37-byte payload, 3.6V) enables >7-year battery life; integrated 26MHz crystal ensures precise 100ms advertising interval accuracy. |
Use Scenario: Logistics tag tracking pallets across warehouses using periodic BLE scan responses and motion-triggered wake-up. IC Role / Device Role / Timing Role: ATSAMB11G18A-MU-T operates as motion-aware tracker - using internal quadrature decoder and GPIO wake-up inputs to detect movement, then initiating BLE connection or broadcast. Use Value: Three always-on AO_GPIO pins (AO_GPIO_0–AO_GPIO_2) provide hardware-level wake-up with <50nA leakage; eliminates need for external accelerometer interrupt lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLE SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52810-QFAA | BLE 5.0 capable, 64MHz Cortex-M4F, 192kB Flash/24kB RAM; no integrated DC/DC; requires external LDO | Higher compute throughput for complex mesh networking; lacks hardware RTC oscillator and integrated buck converter | Select when BLE 5.0 features (long range, coded PHY) or floating-point math are required; accept added BOM cost and layout complexity |
| Texas Instruments CC2640R2F | BLE 5.0, 48MHz Cortex-M3, 128kB Flash/20kB RAM; integrated DC/DC; ROM-based BLE stack; no hardware SHA-256 | Strong RF performance (-101dBm RX) and TI's SimpleLink SDK ecosystem; limited crypto acceleration vs. ATSAMB11G18A-MU-T | Select for TI ecosystem familiarity or superior RF link budget; note absence of SHA-256 hardware for certificate validation |
Compared with Nordic nRF52810-QFAA and TI CC2640R2F, ATSAMB11G18A-MU-T offers lowest active and sleep current among BLE 4.1 SoCs with integrated buck converter and full hardware crypto - making it optimal for ultra-long-life, cost-sensitive, single-chip sensor nodes where BLE 5.0 features are unnecessary.
Availability
ATSAMB11G18A-MU-T is available at Aetrix Electronics and suitable for wearable health monitors, industrial wireless sensor nodes, smart home beacons, and asset tracking tags requiring stable component supply and long-term lifecycle assurance.
Supply support for ATSAMB11G18A-MU-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full support for the SAM family of microcontrollers and wireless SoCs, emphasizing reliability, longevity, and industrial-grade qualification.
The SAMB11 product line was designed specifically for ultra-low-power Bluetooth Smart applications in space-constrained, battery-operated devices - prioritizing RF performance, sleep efficiency, and integrated power management over raw compute throughput.
FAQ
What BLE protocol versions and profiles does the ATSAMB11G18A-MU-T support?
The ATSAMB11G18A-MU-T implements Bluetooth 4.1 and is certified under QD IDs D028678 (controller) and D028679 (host). Its ROM-stored stack supports GAP, GATT, ATT, L2CAP, and Security Manager, plus pre-integrated application profiles including Proximity, Thermometer, Heart Rate, Blood Pressure, and many others - enabling immediate deployment without external host processor.
Does the ATSAMB11G18A-MU-T require external components for its DC/DC converter?
Yes, the ATSAMB11G18A-MU-T's integrated buck DC/DC converter requires two external components: a 4.7µH inductor and a 4.7µF output capacitor. These are mandatory for stable 1.2V core supply generation from 2.3–4.3V battery input. The datasheet specifies allowable inductor/capacitor ranges and provides efficiency vs. load curves for design validation.
What is the minimum sleep current achievable with RTC and memory retention on the ATSAMB11G18A-MU-T?
The ATSAMB11G18A-MU-T achieves 1.1µA typical current in Ultra_Low_Power state with 8KB RAM retention and RTC running from external 32.768kHz crystal. This value assumes default on-chip capacitance only (no external caps), CL=7pF crystal, and all peripherals disabled - verified per Table 6-3 in the official datasheet.
Can the ATSAMB11G18A-MU-T operate without an external 26MHz crystal?
Yes, the ATSAMB11G18A-MU-T includes an integrated 26MHz RC oscillator usable for non-timing-critical applications. However, BLE advertising and connection intervals require precise timing - the datasheet mandates use of the external 26MHz crystal (XO_P/XO_N pins) for full BLE 4.1 compliance and guaranteed RF performance.
How many GPIOs on the ATSAMB11G18A-MU-T support wake-up from deep sleep?
The ATSAMB11G18A-MU-T provides three dedicated always-on wake-up GPIOs: AO_GPIO_0, AO_GPIO_1, and AO_GPIO_2. These pins remain active in Ultra_Low_Power state, support 96kΩ internal pull-up resistors, and can trigger wake-up events without powering the main digital domain - confirmed in Table 4-1 and Section 6.6 of the datasheet.
ATSAMB11G18A-MU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v4.1
- Modulation:
- -
- Frequency:
- 2.4GHz
- Data Rate (Max):
- -
- Power - Output:
- 3.5dBm
- Sensitivity:
- -96dBm
- Memory Size:
- 256kB Flash, 128kB ROM, 128kB RAM
- Serial Interfaces:
- I2C, SPI, UART
- GPIO:
- 30
- Voltage - Supply:
- 2.3V ~ 4.3V
- Current - Receiving:
- 4.2mA
- Current - Transmitting:
- 3mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-QFN (6x6)
ATSAMB11G18A-MU-T FAQ
1.How can I place an order for ATSAMB11G18A-MU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ATSAMB11G18A-MU-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ATSAMB11G18A-MU-T reliable?
The price and inventory of ATSAMB11G18A-MU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATSAMB11G18A-MU-T is usually 5 days.
3.What payment methods are accepted for ATSAMB11G18A-MU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATSAMB11G18A-MU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATSAMB11G18A-MU-T?
ATSAMB11G18A-MU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATSAMB11G18A-MU-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ATSAMB11G18A-MU-T?
For technical support, including ATSAMB11G18A-MU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATSAMB11G18A-MU-T requirements.
6.How does Aetrix verify that ATSAMB11G18A-MU-T is sourced from the original manufacturer or authorized distributors?
All ATSAMB11G18A-MU-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ATSAMB11G18A-MU-T meets industry standards.
7.What is the process for return or replacement of ATSAMB11G18A-MU-T?
All ATSAMB11G18A-MU-T units undergo pre-shipment inspection (PSI). If there is an issue with ATSAMB11G18A-MU-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ATSAMB11G18A-MU-T part is unused and in its original packaging.
Return procedure for ATSAMB11G18A-MU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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