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nRF52805 emulation on nRF52 DK
Overview
The nrf52dk_nrf52805 board is a modified version of the nRF52 DK that enforces the limitations imposed by the nRF52805 IC, which is a cost-reduced variant of the original nRF52832. Since Nordic does not offer a development kit for the nRF52805, you can use this board to develop for this IC while using the nRF52 Development Kit (PCA10040).
See nRF52 DK for more information about the development board and nRF52805 website 1 for the official reference on the IC itself.