nRFnRF52840 SoC
Overview
The nRF52840-CKAA-R7 is Nordic Semiconductor's nRF52840 wireless system-on-chip in a 7 x 7 mm QFN package. It combines a 32-bit ARM Cortex-M4 MCU with 2.4 GHz Bluetooth 5 and IEEE 802.15.4 radio support, making it a common choice for connected embedded designs. It is aimed at battery-powered and short-range wireless products that need a flexible radio stack and substantial on-chip integration.
Why Choose This Part
This part integrates the MCU, 2.4 GHz radio, and wireless protocol support in one device, which can simplify the BOM and PCB layout compared with a discrete radio design. The nRF52840 family is widely used in wireless embedded products, so it has strong ecosystem support and many example-based development flows. Its flexibility across Bluetooth LE and IEEE 802.15.4 makes it useful for products that may need more than one short-range wireless protocol.
Applications
Getting Started
A practical starting point is a Nordic development kit based on the nRF52840, such as the nRF52840 DK, along with Nordic's nRF Connect SDK and Segger Embedded Studio or a Zephyr-based workflow. For debugging, Nordic's tools and J-Link-compatible probes are commonly used, and the on-chip USB support can help during bring-up and firmware loading. For RF designs, follow Nordic's reference schematics and layout guidance carefully, especially around the antenna and power supply decoupling.
Dev Boards
Development boards and breakout modules featuring the nRF52840-CKAA-R7 or compatible chips — ready to use for prototyping.
nRF52840 Family
| Part Number | Difference | Stock |
|---|---|---|
| NRF52840-DONGLE (Nordic Semiconductor ASA) | DONGLE | 154 |
| nRF52840-DK | DK | 587 |
| nRF52840-QIAA-T | QIAA-T | 1,299 |
| nRF52840-QIAA-R | QIAA-R | 3,326 |
| NRF52840-QIAA-R7 | QIAA-R7 | — |
| nRF52840-QIAA | QIAA | — |
| nRF52840 Dongle | Dongle | — |
| nRF52840-QIAA-RK | QIAA-RK | — |
