Abstract: A phased array antenna may include a substrate and a plurality of phased array antenna elements carried thereby and an element control device for at least one of the phased array antenna elements. The element control device may include an IC die including output circuitry, readback circuitry, and control circuitry connected to the output and readback circuitry. The element control device may further include an IC package surrounding the IC die, a plurality of output terminals connected to the output circuitry and extending outwardly from the IC package, and a plurality of readback input terminals connected to the readback circuitry and extending outwardly from the IC package. Further, respective external readback connections may extend between the plurality of output terminals and the plurality of readback input terminals. The control circuitry may cause the output circuitry to output signals on the plurality of output terminals to be read back for fault detection.