nRF52805 : Bluetooth 5.2 SoC

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The nRF52805 is a Bluetooth 5.2 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).

Features :

  • Bluetooth 5.0, 2.4 GHz transceiver
    • -97 dBm sensitivity in 1 Mbps Bluetooth Low Energy mode
    • -20 to +4 dBm TX power, configurable in 4 dB steps
    • On-air compatible with nRF52, nRF51, nRF24L, and nRF24AP Series
    • Supported data rates:
      • Bluetooth 5.0 – 2 Mbps, 1 Mbps
      • Proprietary 2.4 GHz – 2 Mbps, 1 Mbps
    • Single-ended antenna output (on-chip balun)
    • 4.6 mA peak current in TX (0 dBm)
    • 4.6 mA peak current in RX
    • RSSI (1 dB resolution)
  • Arm® Cortex®-M4 32-bit processor, 64 MHz
    • 144 EEMBC CoreMark® score running from flash memory
    • 34.4 µA/MHz running CoreMark from flash memory
    • 32.8 µA/MHz running CoreMark from RAM
    • Serial wire debug (SWD)
  • Flexible power management
    • 1.7 V to 3.6 V supply voltage range
    • On-chip DC/DC and LDO regulators with automated low current modes
    • Fast wake-up using 64 MHz internal oscillator
    • 0.3 µA at 3 V in System OFF mode, no RAM retention
    • 0.5 µA at 3 V in System OFF mode with full 24 kB RAM retention
    • 1.1 µA at 3 V in System ON mode, with full 24 kB RAM retention, wake on RTC (running from LFXO clock)
    • 1.0 µA at 3 V in System ON mode, no RAM retention, wake on RTC (running from LFXO clock)

  • 192 kB flash and 24 kB RAM
  • Advanced on-chip interfaces
    • Programmable peripheral interconnect (PPI)
    • 10 general purpose I/O pins
    • EasyDMA automated data transfer between memory and peripherals
  • Nordic SoftDevice ready with support for concurrent multiprotocol
  • Temperature sensor
  • 12-bit, 200 ksps ADC – 2 configurable channels with programmable gain
  • 3x 32-bit timer with Counter mode
  • SPI master/slave with EasyDMA
  • I2C compatible two-wire master/slave
  • UART (CTS/RTS) with EasyDMA
  • Quadrature decoder (QDEC)
  • AES HW encryption with EasyDMA
  • 2x real-time counter (RTC)
  • Single crystal operation
  • Package variants
    • WLCSP package, 2.482 x 2.464 mm

Applications :

  • Proprietary protocol devices
  • Network processor
  • Beacons
  • Smart Home sensors
  • Presenters/Stylus
  • Health monitoring
  • Drug delivery
  • Asset tags
  • Toys
  • Retail tags and labels

Farees Ahmed

The aim of this blog is to serve as a quick reference guide for the Curious. Appreciate your feedback and comments !