2 dB LSB, 4-Bit, Silicon Digital Attenuator,
100 MHz to 40 GHz
Ultrawideband frequency range: 100 MHz to 40 GHz
Attenuation range: 2 dB steps to 30 dB
Low insertion loss
1.7 dB to 18 GHz
2.2 dB to 26 GHz
3.5 dB to 40 GHz
±(0.1 + 2.0%) of attenuation state up to 18 GHz
±(0.2 + 2.5%) of attenuation state up to 26 GHz
±(0.5 + 10.0%) of attenuation state up to 40 GHz
Typical step error
±0.15 dB to 18 GHz
±0.20 dB to 26 GHz
±0.60 dB to 40 GHz
High input linearity
P0.1dB insertion loss state: 30 dBm
P0.1dB other attenuation states: 26 dBm
IP3: 50 dBm typical
High RF input power handling: 26 dBm average, 30 dBm peak
Tight distribution in relative phase
No low frequency spurious signals
SPI and parallel mode control, CMOS/LVTTL compatible
RF amplitude settling time (0.1 dB of final RF output): 230 ns
2.5 mm × 2.5 mm, 16-terminal LGA package
Pin compatible with ADRF5721, low frequency cutoff version
Test and instrumentation
Cellular infrastructure: 5G millimeter wave
Military radios, radars, electronic counter measures (ECMs)
Microwave radios and very small aperture terminals (VSATs)
The ADRF5731 is a silicon, 4-bit digital attenuator with a 30 dB
attenuation control range in 2 dB steps.
This device operates from 100 MHz to 40 GHz with better than
3.5 dB of insertion loss. The ATTIN port of the ADRF5720 has
a radio frequency (RF) input power handling capability of 26 dBm
average and 30 dBm peak for all states.
The ADRF5731 requires a dual supply voltage of +3.3 V and
−3.3 V. The device features serial peripheral interface (SPI),
parallel mode control, and complementary metal-oxide
semiconductor (CMOS)-/low voltage transistor to transistor
logic (LVTTL) compatible controls.
FUNCTIONAL BLOCK DIAGRAM
16 15 14 13
The ADRF5731 is pin compatible with the ADRF5721 low
frequency cutoff version, which operates from 9 kHz to 40 GHz.
The ADRF5731 RF ports are designed to match a characteristic
impedance of 50 Ω.
The ADRF5731 comes in a 16-terminal, 2.5 mm × 2.5 mm,
RoHS compliant, land grid array (LGA) package and operates
from −40°C to +105°C.
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