NRF51822-QFABB2/FCV2055V4/CV20 NRF51822-QFAB-B-R NRF51822-QFABC00 NRF51822-QFABCO NRF51822-QFAB-R NRF51822-QFAB-R7 NRF51822-QFAB-R-C0 NRF51822-QFAB-T NRF51822QFAC NRF51822-QFAC