Nrf52840 package

 We are completing the design of a PCB and have a mounting/assembly issue with the NRF52840. We In looking at the mechanical spec on your datasheet w find that A row of 24 solder balls with a pitch of 0.5mm cannot fit into a 7mm package.so what is our alternative

 span  = 23(pitch)*(0.5mm) = 11.5mm