The nRF52805 System-on-Chip (SoC) is the 7th addition to the industry-leading nRF52® Series. It augments the already extensive collection of wireless SoCs 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, simple CE remotes, styluses and presenters. It can also be applied as a network processor, allowing another MCU to leverage its connectivity.
The nRF52805 features an Arm® Cortex®-M4 processor, clocked at 64 MHz (144 CoreMark), with excellent efficiency (65 CoreMark/mA). 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, and TWI. The SoC's current draw is as little as 0.3 mA in System OFF and 1.1 mA in System ON with 24 KB RAM retained and RTC running.
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, such as Enhanced ShockBurst (ESB). The radio has up to 4 dBm TX power and -97 dBm sensitivity (1 Mbps Bluetooth LE). The radio draws only 4.6 mA in both TX (0 dBm) and RX.
The nRF52805 is available in our smallest package, a 2.48x2.46 mm WLCSP package, with 10 GPIOs. The package is optimized for two-layer PCBs, cutting cost significantly, compared to four-layer PCBs. Nordic provides a 9.5x8.8 mm reference layout with all ten
GPIOs available, requiring only 10 external passive components (inc. two crystal load capacitors). nRF52805 offers the rare combination of low cost and small size, normally being a trade-off.
The nRF52805 is supported by two Bluetooth Low Energy protocol stacks, SoftDevice S112 and S113. The S112 and S113 are memory-optimized Peripheral-only stacks supporting up to 4 connections as a Peripheral concurrently with a Broadcaster. They are Bluetooth 5.1 qualified and supports the following Bluetooth features: high-throughput 2 Mbps and channel selection algorithm 2 (CSA #2).
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. A guide on how to use nRF52805 with nRF5 SDK is available.