The ADMV1228 from Analog Devices is a 2T2R Beamformer IC that operates from 24.0 GHz to 29.5 GHz. It has an integrated 16 (2x8) channel beamformer paired with a 2 transmit (TX) and 2 receive (RX) channel upconverter/downconverter (UDC). This dual polarization beamformer IC has on-chip transmit-receive switches that connect the upconverter RF output and downconverter RF input for each polarization into eight independent channels via the 1:8 power splitters/combiners. It has an on-chip temperature sensor for RX/TX automatic temperature compensation for gain. The transmit channels also have individual transmit power detectors.
The ADMV1228 has a vector modulator (VM) to control the phase and a DVGA to control the amplitude. The VM provides a full 360° phase adjustment range in either transmit or receive mode to provide 6 bits of resolution for 5.625° phase steps. This beamformer IC has an on-chip nonvolatile memory (NVM) for phase & gain calibration and allocated memory for 512 TX/RX beam positions. It has an upconversion mode for sideband rejection and carrier feedthrough optimization. This mode also includes a single-channel power detector and an envelope detector for LO feedthrough calibration. In downconversion mode, this beamformer IC can optimize image rejection.
The ADMV1228 requires a dual DC supply of 3.3 and 1.8 V and can be controlled via a 3-wire or 4-wire SPI interface. It is available in a CSP BGA package that measures 12 x 9 mm and is ideal for mmW 5G and broadband communication applications.
