NRF52820-QDAA-R7

NRF52820-QDAA-R7 is Nordic Semiconductor’s nRF52820 system-on-chip (SoC) in the QDAA package, silicon revision R7. It belongs to the nRF52 family and is designed for Bluetooth Low Energy (BLE) and 2.4 GHz radio applications, typically used in wearables, beacons, and IoT sensors.
Key points:
- Core: ARM Cortex-M4F MCU (highly energy‑efficient for BLE workloads).
- Radio: 2.4 GHz wireless transceiver supporting BLE and 2.4 GHz proprietary protocols (plus ANT in some variants).
- Packaging/revision: QDAA denotes the specific package/variant; R7 indicates silicon revision 7.
- Memory and peripherals: on‑chip flash and RAM sizes depend on the exact SKU; peripherals include GPIO, UART, SPI, I2C, PWM, ADC, timers, RTC, etc.
- Development: supported by Nordic’s nRF Connect SDK and SoftDevice BLE stacks; development boards and tooling are available from Nordic.
Note: Check the official datasheet for exact memory, peripheral counts, and feature set for this specific SKU.

Key features of nRF52820-QDAA-R7:
- 64 MHz ARM Cortex-M4F CPU
- 2.4 GHz multi-protocol radio: Bluetooth Low Energy (5.x, including 2 Mbps), ANT, and proprietary 2.4 GHz
- Memory: flash and RAM (SKU dependent; typical variants offer up to around 1 MB flash and up to ~256 KB RAM)
- Security: hardware cryptography engine, RNG, secure boot
- Peripherals: SAADC, SPIM/SPIS, TWIM (I2C), UARTE/UART, I2S, PDM, PWM, timers, RTC
- Power management: ultra-low power with DC-DC regulator and multiple power modes
- Interconnect: DPPI/easyDMA for peripheral data transfers
- Debug/Development: SWD, compatible with Nordic tools
- Package: QDAA form factor
Note: Exact memory counts vary by variant; consult the datasheet for the precise SKU.

- Pin count: 48 pins (QFN package, 7x7 mm).
- Function: nRF52820-QDAA-R7 is a Bluetooth Low Energy SoC with an ARM Cortex-M4F MCU and a 2.4 GHz transceiver (multi-protocol radio; BLE/ANT/802.15.4 support) plus embedded flash RAM for embedded applications.

Manufacturer: Nordic Semiconductor ASA.
Company type: Norwegian fabless semiconductor company that designs wireless ICs/SoCs (notably Bluetooth Low Energy, ANT, etc.) and outsources wafer fabrication to semiconductor foundries.

Applications for NRF52820-QDAA-R7 include:
- Battery-powered wireless devices with BLE/2.4 GHz (BLE and ANT)
- Wearables and health/fitness sensors
- Beacons, asset tracking, and location services
- Smart home/building automation
- Remote controls and wireless accessories
- Industrial IoT sensors (monitoring, predictive maintenance)
- Consumer electronics requiring compact, low-power Bluetooth
- Medical devices needing small size and long battery life
These cover low-cost, compact IoT devices with long battery life.

QFN (QDAA) package, 7×7 mm.