Best way to use multiple nRF52832 on the same PCB?

[rfpenguin]

Specifically, can you provide any guidelines for sharing the clock or crystal? and maybe the antenna? (in case of RX only)

[Dave_couling]

Just curious as to why you'd need multiple chips on the same board?  Your useful will help drive how you might want to integrate them

[rfpenguin]

We just want to save some board space, they don't need to interact in any way. We are working on a sniffer that resemble ubertooth and we would like to capture packets from multiple channels concurrently.

[Nguyen Hoan Hoang]

Try this module https://www.crowdsupply.com/i-syst/blyst-nano

It is extremely small 10x7mm with everything builtin : crystals, dc/dc coils.  No additional components to add, just power it up from 1.75V-3.6V.  Putting multiple modules on the same board is a breeze.  The module is also fully FCC/CE certified.

[ketiljo]

If you want to use RX only, it's possible to share the crystal and the antenna between the devices. But you can't transmit with any them without loosing the reception.

Connect XC2 from one device to XC1 on the other devices. Make sure the HFXO is always running on the master. You can also use a crystal oscillator module and connect this to XC1 on all devices. Make sure this a type that doesn't have a PLL as the phase noise will be too great. It usually says "programmable" in the datasheet in that case. It must be a proper crystal.

If you share the antenna with a splitter, note that you will loose 3 dB pr 2 outputs. If you have a 2 way splitter, each output will have 3 dB "loss". With a way, 6 dB "loss" etc.