NRF52811-CAAA-R

NRF52811-CAAA-R is Nordic Semiconductor’s nRF52811 System-on-Chip (SoC) in a BLE/2.4 GHz wireless MCU form. It belongs to the nRF52 family and combines an ARM Cortex-M0+ CPU with a 2.4 GHz RF transceiver, designed for low-power Bluetooth Low Energy and 2.4 GHz proprietary protocols. Suitable for compact, battery-powered devices such as wearables, beacons, sensors, and remote controls, it emphasizes small footprint and long battery life through multiple power modes.
The -CAAA-R suffix identifies a specific ordering/packaging variant (temperature range, package type, reel/tape packaging) as defined in Nordic’s data. Exact specs (CPU speed, RAM/Flash, BLE feature set, current consumption, and packaging) vary by revision; refer to the nRF52811 Product Specification and the Ordering Information in Nordic’s documentation for precise details.

Equivalent Nordic chips to NRF52811-CAAA-R are:
- nRF52810 (closest feature parity: BLE, same flash/RAM, no USB)
- nRF52832 (more RAM/peripherals)
- nRF52840 (USB, advanced features)
Use nRF52810 for drop-in parity; upgrade to 52832/52840 for more capability.

Here are the core features of the nRF52811-CAA A-R (BLE SoC):
- 32-bit ARM Cortex-M4F CPU, up to 64 MHz
- Integrated 2.4 GHz transceiver for Bluetooth Low Energy
- Hardware cryptography accelerator (AES-128, SHA) for secure comms
- Rich peripheral set: SAADC, UART/UARTE, SPI (SPIM/SPIS), I2C (TWIM), QSPI, PWM, timers, RTC
- Peripheral-to-peripheral messaging via PPI and GPIOTE; DMA/Easy DMA
- Low-power design with multiple sleep modes and efficient power management
- Microcontrollers-compatible memory (flash/RAM) sized for BLE apps (exact amounts vary by package)
- Debug/trace: SWD/JTAG support
- Robust, small-form-factor package suitable for wearables and compact IoT devices
Note: Exact memory sizes and BLE feature details vary by variant/kit; consult the datasheet for your exact package (NRF52811-CAA A-R) for precise numbers.

Pin count: 32 pins (QFN package).
Function: Nordic nRF52811 SoC with integrated 2.4 GHz BLE transceiver and an ARM Cortex-M0 MCU, intended for Bluetooth Low Energy/IEEE 802.15.4/ANT wireless applications.

Manufacturer: Nordic Semiconductor ASA.
What kind of company: A Norwegian fabless semiconductor company that designs wireless short-range communication SoCs (notably Bluetooth Low Energy, ANT, Thread) and software stacks, outsourcing silicon fabrication to contract manufacturers.

nRF52811-CAAA-R is a low‑power Bluetooth Low Energy (BLE) SoC. Common application areas include:
- Wearables and health/fitness devices
- Beacons and location-based services
- Smart home/building IoT sensors (temp, humidity, occupancy)
- Remote controls and wireless peripherals (mice, keyboards, game controllers)
- Industrial monitoring and asset tracking
- Consumer electronics and smart toys requiring BLE connectivity
Note: best suited for battery-powered, cost-sensitive BLE devices.

It’s in a 32-pin QFN package (5×5 mm), i.e., QFN-32.