Data Sheet
ADMV4801
24 GHz to 29.5 GHz Transmitter/Receiver, Single Polarization Beamformer
mismatch. The ADMV4801 RF ports can be connected directly to a
patch antenna to create a dual polarization, mmW, 5G subarray.
FEATURES
► RF frequency range: 24 GHz to 29.5 GHz
The programming of the ADMV4801 can be accomplished using
the 3-wire or 4-wire serial port interface (SPI). An integrated, on-
chip low dropout regulator (LDO) generates the 1.8 V supply for
the SPI circuitry to reduce the number of required supply domains.
Various SPI modes are available to enable fast startup and control
during normal operation. The amplitude and phase for each chan-
nel can be set individually, or multiple channels can be programmed
simultaneously using the on-chip memory for beamforming. The
on-chip memory can store up to 256 beam positions, which can be
allocated for either transmit or receive mode. A dedicated load pin
provides synchronization of all devices in the same array. A transmit
and receive mode control pin is provided for fast switching between
transmit and receive mode.
► 16 configurable transmit channels
► 16 configurable receive channels
► Fast TDD switching time using external pins
► Matched, 50 Ω, single-ended RF inputs and outputs
► Integrated transmitter power detectors and temperature sensor
► High resolution, 6-bit vector modulators for phase control
► High resolution, 6-bit and 5-bit DVGAs for amplitude control
► Gain compensation over temperature
► Memory for 256 beam positions
► Single power supply required: 3.3 V with on-chip LDO for 1.8 V
► Adjustable power modes for power consumption reduction
► 3-wire or 4-wire SPI supporting up to a 61.44 MHz SPI clock
speed
► 72-lead, 10 mm × 10 mm, microwave LGA package
The ADMV4801 is featured in a compact, thermally enhanced, 10
mm × 10 mm, RoHS compliant land grid array (LGA) package. The
ADMV4801 operates over the −40°C to +95°C case temperature
range. This LGA package enables the ability to heat-sink the
ADMV4801 from the topside of the package for the most efficient
thermal heat-sinking and to allow flexible antenna placement on the
opposite side of the printed circuit board (PCB).
APPLICATIONS
► 5G applications
► Broadband communication
► Test and measurement
► Aerospace and defense
Throughout the figures in this data sheet, Tx means transmit (or
transmitter) and Rx means receive (or receiver).
Additional digital details of ADMV4801 are available in AN-2021
Application Note, ADMV4801 SPI Application Note. Contact Analog
Devices at mmWave5G@analog.com.
GENERAL DESCRIPTION
The ADMV4801 is a silicon germanium (SiGe), 24 GHz to
29.5 GHz, mmW, 5G beamformer. This RF IC is highly integrated
and contains 16 independent transmit and receive channels. In
transmit mode, the RFC input signal is split using 1:16 power
splitters and passes through the 16 independent transmit channels.
In receive mode, input signals pass through the 16 independent
channels and are combined with 16:1 combiners to the RFC pin.
In transmit mode, each channel includes a vector modulator (VM)
to control phase and two digital variable gain amplifiers (DVGAs) to
control amplitude. In receive mode, each channel includes a VM to
control phase and a DVGA to control amplitude. The VM provides a
full 360° phase adjustment range in either transmit or receive mode,
providing 6 bits of resolution for 5.625° phase steps. The total
DVGA dynamic range adjustment range in transmit mode is 34 dB,
providing 6 bits of resolution, resulting in 0.5 dB amplitude steps,
and 5 bits of resolution, resulting in 1 dB amplitude steps. In receive
model the total dynamic range is 17 dB providing, 6 bits of resolu-
tion, resulting in 0.5 dB amplitude steps. The DVGAs provide a flat
phase response across the full gain range. The transmit channels
contain individual power detectors to provide the ability to detect
and calibrate each channel gain, as well as channel to channel gain
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to
change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
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