Antenna load impedance of nRF51822

[Johnson CHEN]

Hello Nordic expert, Regarding the antenna load impedance, I can find the data in nRF24L01+ datasheet and it is 15ohm +j88ohm. But I can not find the antenna load impedance of nRF51822 in its datasheet(nRF51822_PS_v1_3). Can you help me to check it? Thank you.

Best regards, Johnson CHEN

[Håkon Alseth]

Hi Johnson,

The load that the ANT1/ANT2 pins should see has been found to be 6.3+j107 ohms for the QFN48 package of the nRF51x22.

Best regards Håkon

[Gavin Gallino]

Hi Håkon,

Could you also list the load impedance for the other chip packages? Specifically I am interested in the value for the WLCSP (BGA 62).

Regards, Gavin Gallino

[Håkon Alseth]

Hi Gavin,

Unfortunately, we do not have this information for the WLCSP yet.

Best regards Håkon