nRF52805System-on-Chip

Bluetooth 5.3 SoC in a WLCSP optimized for small two-layer PCB designs

The nRF52805 System-on-Chip (SoC) augments the industry-leading nRF52 Series with an SoC in a WLCSP optimized for small two-layer PCB designs, ideal for cost-constrained applications. It is the perfect choice for applications such as beacons, disposable medical devices, sensors, styluses and presenters.

The nRF52805 features an Arm® Cortex®-M4 processor, clocked at 64 MHz. It has 192 KB Flash and 24 KB RAM and integrates a range of analog and digital interfaces such as a 2-channel 12-bit ADC, SPI, UART, TWI and QDEC.

The nRF52805 is a Bluetooth 5.3 SoC supporting Bluetooth Low Energy and 2.4 GHz proprietary protocols. It is capable of Bluetooth high-throughput 2 Mbps, transferring data faster and more efficient, and Bluetooth channel selection algorithm #2 (CSA #2), improving coexistence and reducing interference. It also supports 2.4 GHz proprietary protocols. The radio has up to 4 dBm TX power and -97 dBm sensitivity (1 Mbps Bluetooth LE).

The nRF52805 is available in our smallest package, a 2.48x2.46 mm WLCSP, optimized for two-layer PCB designs. This enables designs that are small and low cost, attributes that are typically a design trade-off, since small designs typically require four-layer PCBs, which have significantly higher cost. We provide a 9.5x8.8 mm reference layout with all ten GPIOs available, requiring only 10 external passive components (inc. two crystal load capacitors).

The nRF52 DK is the recommended development kit, it emulates the nRF52805, and can be used as a starting point for development before moving over to a custom board.

Download PDFDownload nRF52805 SoC product brief [PDF]

Key features
  • 64 MHz Cortex-M4
  • 192 KB Flash, 24 KB RAM
  • 2.4 GHz transceiver
  • 2 Mbps, 1 Mbps
  • Bluetooth Low Energy
  • +4 dBm TX power
  • -97 dBm RX sensitivity
  • 128-bit AES
  • UART, SPI, TWI, QDEC
  • 12-bit ADC

Comparison of our Bluetooth LE SoCs

SoC nRF5340 nRF52840 nRF52833 nRF52832 nRF52820 nRF52811 nRF52810 nRF52805
Bluetooth  5.3 5.3 5.3 5.3 5.3 5.3 5.3 5.3
Thread  Yes Yes Yes Yes Yes
Matter  Yes Yes
Zigbee  Yes Yes Yes Yes
Bluetooth Mesh  Yes Yes Yes Yes Yes
Flash   1 MB + 256 KB 1 MB 512 KB 512/256 KB 256 KB 192 KB 192 KB 192 KB
RAM   512 KB + 64 KB 256 KB 128 KB 64/32 KB 32 KB 24 KB 24 KB 24 KB
CPU   128 MHz Arm Cortex-M33 + 64 MHz Arm Cortex-M33 64 MHz Arm Cortex-M4 with FPU 64 MHz Arm Cortex-M4 with FPU 64 MHz Arm Cortex-M4 with FPU 64 MHz Arm Cortex-M4 64 MHz Arm Cortex-M4 64 MHz Arm Cortex-M4 64 MHz Arm Cortex-M4
High-Speed SPI   Yes Yes Yes
QSPI   Yes Yes
USB   Yes Yes Yes Yes
PWM, PDM, I2S   Yes Yes Yes Yes PWM, PDM PWM, PDM
ADC, Comp  Yes Yes Yes Yes COMP ADC, COMP ADC, COMP ADC
Temp Range -40 to 105 °C -40 to 85 °C -40 to 105 °C -40 to 85 °C -40 to 105 °C -40 to 85 °C -40 to 85 °C -40 to 85 °C
Supply voltage range   1.7 to 5.5 V 1.7 to 5.5 V 1.7 to 5.5 V 1.7 to 3.6 V 1.7 to 5.5 V 1.7 to 3.6 V 1.7 to 3.6 V 1.7 to 3.6 V
Packages   aQFN94

WLCSP95
aQFN73

WLCSP94
aQFN73

QFN40

WLCSP76
QFN48

WLCSP50
QFN40 QFN48

QFN32

WLCSP33
QFN48

QFN32

WLCSP33
WLCSP28
GPIOs   48 48 18-42 32 18 15-32 15-32 10