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ADRF5721 Datasheet

Silicon Digital Attenuator

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Data Sheet
2 dB LSB, 4-Bit, Silicon Digital Attenuator,
9 kHz to 40 GHz
ADRF5721
FEATURES
Ultrawideband frequency range: 9 kHz to 40 GHz
Attenuation range: 2 dB steps to 30 dB
Low insertion loss
1.6 dB to 18 GHz
2.0 dB to 26 GHz
3.4 dB to 40 GHz
Attenuation accuracy
±(0.1 + 1.0%) of attenuation state up to 18 GHz
±(0.1 + 2.5%) of attenuation state up to 26 GHz
±(0.6 + 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 switching spurs
SPI and parallel mode control, CMOS/LVTTL compatible
RF amplitude settling time (0.1 dB of final RF output): 8.5 μs
2.5 mm × 2.5 mm, 16-terminal LGA package
Pin compatible with ADRF5731, fast switching version
APPLICATIONS
Industrial scanners
Test and instrumentation
Cellular infrastructure: 5G millimeter wave
Military radios, radars, electronic counter measures (ECMs)
Microwave radios and very small aperture terminals (VSATs)
GENERAL DESCRIPTION
The ADRF5721 is a silicon, 4-bit digital attenuator with a 30 dB
attenuation control range in 2 dB steps.
This device operates from 9 kHz to 40 GHz with better than 3.4 dB
of insertion loss. The ATTIN port of the ADRF5721 has a radio
frequency (RF) input power handling capability of 26 dBm
average and 30 dBm peak for all states.
The ADRF5721 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
FUNCTIONAL BLOCK DIAGRAM
ADRF5721
16 15 14 13
D4/SERIN 1
D5/CLK 2
GND 3
ATTIN 4
SERIAL/
PARALLEL
INTERFACE
4-BIT DIGITAL
ATTENUATOR
12 VDD
11 VSS
10 GND
9 ATTOUT
5678
PACKAGE
BASE
Figure 1.
semiconductor (CMOS)-/low voltage transistor to transistor
logic (LVTTL)-compatible controls.
The ADRF5721 is pin compatible with the ADRF5731, the fast
switching version, which operates from 100 MHz to 40 GHz.
The ADRF5721 RF ports are designed to match a characteristic
impedance of 50 Ω.
The ADRF5721 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.
Rev. A
Document Feedback
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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.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2018–2020 Analog Devices, Inc. All rights reserved.
Technical Support
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Analog Devices Semiconductor Electronic Components Datasheet

ADRF5721 Datasheet

Silicon Digital Attenuator

No Preview Available !

ADRF5721
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Specifications ............................................................... 3
Timing Specifications .................................................................. 5
Absolute Maximum Ratings ....................................................... 6
Thermal Resistance ...................................................................... 6
Power Derating Curves................................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Interface Schematics..................................................................... 7
Typical Performance Characteristics ............................................. 8
REVISION HISTORY
3/2020—Rev. 0 to Rev. A
Changes to RF Power Parameter, Table 1 ...................................... 4
Changes to Table 3............................................................................ 6
Changes to Power Supply Section ................................................ 11
Added Power-Up State Section..................................................... 11
Moved Serial or Parallel Mode Selection Section and Table 7;
Renumbered Sequentially ......................................................................12
9/2018—Revision 0: Initial Version
Data Sheet
Insertion Loss, Return Loss, State Error, Step Error, and
Relative Phase ................................................................................8
Input Power Compression and Third-Order Intercept......... 10
Theory of Operation ...................................................................... 11
Power Supply............................................................................... 11
RF Input and Output ................................................................. 11
Serial or Parallel Mode Selection ............................................. 12
Serial Mode Interface................................................................. 12
Parallel Mode Interface.............................................................. 13
Applications Information .............................................................. 14
Evaluation Board ........................................................................ 14
Probe Matrix Board ................................................................... 16
Packaging and Ordering Information ......................................... 17
Outline Dimensions................................................................... 17
Ordering Guide .......................................................................... 17
Rev. A | Page 2 of 17


Part Number ADRF5721
Description Silicon Digital Attenuator
Maker Analog Devices
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