10 GHz to 40 GHz, 1:4 Channel,
4× Frequency Multiplier/Filter
ADAR2001
Data Sheet
FEATURES
GENERAL DESCRIPTION
The ADAR2001 is a transmitter IC optimized for millimeter
wave body scanning applications. Accepting a single-ended
continuous wave (CW) input signal between 2.5 GHz and 10 GHz,
the ADAR2001 provides gain, 4× frequency multiplication,
harmonic filtering, 1:4 signal splitting, and four independently
controllable power amplifiers (PAs) with differential outputs
designed to directly drive dipole antennas with differential inputs.
All device functions and configuration options can be accessed by a
3-wire or 4-wire Analog Devices, Inc., serial peripheral interface
(SPI).
Two state machines are also integrated into the ADAR2001,
which facilitate easy configuration, control, and fast switching
of the frequency multiplier, filter, and transmitter sections.
These sequencers are programmed through the SPI and are
then operated by pulsed inputs (reset and advance).
The output power and chip temperature can be monitored by
four on-chip detectors and a temperature sensor whose outputs
are multiplexed to an 8-bit ADC.
4× input frequency multiplier with programmable harmonic
filter
Quad differential output PAs with independent enable control
Input frequency range: 2.5 GHz to 10 GHz
Output frequency range: 10 GHz to 40 GHz
Input power: −20 dBm (50 Ω)
Output power: 5 dBm differential (100 Ω)
Harmonic rejection: −20 dBc to −40 dBc at all frequencies
3-wire or 4-wire SPI control of all functions
On-chip programmable state machines for fast
multiplier/filter and transmitter switching and control
On-chip temperature sensor, output power detectors, and ADC
DC power: 450 mW (2.5 V supply)
6 mm × 6 mm, 40-terminal LGA package
APPLICATIONS
Millimeter wave imaging
Security
Medical
Industrial
The ADAR2001 requires only a single 2.5 V supply with power
consumption of 450 mW with one channel turned on.
Wideband local oscillator (LO) multiplier/distributor
The ADAR2001 is available in a compact, 40-terminal, 6 mm ×
6 mm LGA package and is specified from −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
ADAR2001
MULTIPLIER/FILTER SEQUENCER
×4
TRANSMITTER SEQUENCER
RFOUT1+
RFOUT1–
PA
RFIN
BUFFER
×4
×4
RFOUT2+
RFOUT2–
PA
RFOUT3+
RFOUT3–
PA
CS
SDIO
SCLK
SDO
SPI
CONTROL
RFOUT4+
RFOUT4–
PA
TEMP.
SENSOR
MULTIPLIER/FILTER
STATE MACHINE
(16 STATES)
TRANSMITTER
STATE MACHINE
(70 STATES)
ADC
MRST
MADV
TxRST
TxADV
Figure 1.
Rev. 0
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