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HMC1040LP3CE N/C pins

Hi all,

Pin descriptions in the datasheet @ HMC1040LP3CE, it say following,

Pin No:5-8, 14


The pins are not connected internally; however, all data shown herein was measured with these pins connected to RF/DC ground externally.

Do you recommend "the N/C pins connect to RF/DC ground externally" ?

Connecting the N/C pins to the ground might impact to thermal or electric performance ?

Thermal performance is more better, and electric performance is no impact ?

Best regards,