The F5280 is a 4-channel TRX half-duplex silicon IC designed using a SiGe BiCMOS process for 28GHz 5G phased-array applications. The core IC has very flexible gain and phase control on each channel to achieve fine beam steering and gain compensation between radiating channels. The core design includes standard SPI protocol that operates up to 50MHz with fast-beam switching, fast beam-state loading, and fast four on-chip beam storage.


  • 25GHz to 31GHz operation
  • 4 radiation channels
  • 100ns typical RF switch Tx/Rx mode switching time
  • 20ns typical gain and phase settling time
  • 3° typical RMS phase error
  • 0.4dB typical RMS gain error
  • Advanced SPI with 4 state memory
  • 6-bit chip address
  • Integrated PTAT with external biasing
  • Internal temperature sensor
  • Up to 50MHz SPI control
  • Programmable on-chip memory
  • Supply voltage: +2.3V to +2.7V
  • -40°C to +105°C ambient operating temperature range
  • 3.6 × 3.6 mm, 49-BGA package




Title language Type Format File Size Date
star F5280 Short-Form Datasheet Datasheet - Short-form PDF 151 KB
RF Product Selection Guide Guide PDF 1015 KB
Complete Line-up of mmWave Beamforming ICs Product Brief PDF 728 KB