HMC346ALC3BTR [ADI]
HMC346ALC3BTR;
ADI 
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
8
Typical Applications
The HMC346ALC3B is ideal for:
• Test Instrumentation
Features
Wide Bandwidth: DC - 18 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
Simplified Voltage Control
RoHS Compliant 3 x 3 mm SMT Package
General Description
Functional Diagram
The HMC346ALC3B is an absorptive Voltage Variable
Attenuator (VVA) in a leadless “Pb free” RoHS com-
pliant SMT mount ceramic package operating from
DC - 18 GHz. It features an on-chip reference atten-
uator for use with an external op-amp to provide
simple single voltage attenuation control, 0 to -5V.
The device is ideal in designs where an analog DC
control signal must control RF signal levels over a
30 dB amplitude range. The HMC346ALC3B allows
the use of surface mount manufacturing techniques.
Electrical Specifications, TA = +25° C, 50 Ohm system
Parameter
Min
Typical
Max
Units
DC - 10 GHz
DC - 14 GHz
DC - 18 GHz
2.0
2.8
3.3
2.5
3.2
4.0
dB
dB
dB
Insertion Loss
DC - 12 GHz
DC - 18 GHz
26
20
30
24
dB
dB
Attenuation Range
DC - 18 GHz
10
dB
Return Loss
Min. Atten:
Atten. >2 dB:
+5
+4
dBm
dBm
Input Power for 0.25 dB Compression (0.5 - 18 GHz)
Input Third Order Intercept (0.5 - 18 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten:
Atten. >2 dB:
+30
+8
dBm
dBm
tRISE, tFALL (10/90% RF):
tON, tOFF (50% CTL to 10/90% RF):
8
16
ns
ns
Switching Characteristics
Information furnished by Analog Devices is believed to be accurate and reliable. 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.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
8 - 1
HMC346ALC3B* PRODUCT PAGE QUICK LINKS
Last Content Update: 08/17/2017
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DISCUSSIONS
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EVALUATION KITS
• HMC346ALC3B Evaluation Board
SAMPLE AND BUY
Visit the product page to see pricing options.
DOCUMENTATION
TECHNICAL SUPPORT
Data Sheet
Submit a technical question or find your regional support
number.
• HMC346ALC3B: GaAs MMIC Voltage-Variable Attenuator,
DC - 18 GHz Data Sheet
DOCUMENT FEEDBACK
DESIGN RESOURCES
• HMC346ALC3B Material Declaration
• PCN-PDN Information
Submit feedback for this data sheet.
• Quality And Reliability
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HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
8
Relative Attenuation
Insertion Loss vs. Temperature
0
0
-1
-2
-3
-4
-5
-10
-20
-30
-40
0
2
4
6
8
10
12
14
16
18
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
FREQUENCY (GHz)
+85 C
5 dB
10dB
15 dB
20 dB
25 dB
30dB
Max
+25 C
-40 C
Relative Attenuation vs.
Control Voltage @ 10 GHz
Return Loss vs. Attenuation
0
0
-0.5
-1
-5
-10
-15
-20
-25
-30
-35
-1.5
-2
-2.5
-3
-3.5
-4
0
5
10
15
20
25
30
0
2
4
6
8
10
12
14
16
18
RELATIVE ATTENUATION (dB)
FREQUENCY (GHz)
5 dB
Min
Max
V1
V2
Relative Phase vs. Attenuation
180
Input IP3 vs. Attenuation*
40
35
30
25
20
15
10
5
150
120
90
60
30
0
0
0
2
4
6
8
10
12
14
16
18
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
FREQUENCY (GHz)
5 dB
10dB
15 dB
20 dB
25 dB
30dB
Max
0 dB
3 dB
6 dB
10 dB
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
8 - 2
Application Support: Phone: 1-800-ANALOG-D
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Second Harmonic
vs. Attenuation, Pin = -8 dBm
90
8
Input IP2 vs. Attenuation*
90
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
2
4
6
8
10
12
14
16
18
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
FREQUENCY (GHz)
0 dB
3 dB
6 dB
10 dB
0 dB
3 dB
6 dB
10 dB
0.25 dB Compression vs. Attenuation
1 dB Compression vs. Attenuation
20
20
15
10
5
15
10
5
0
0
0
2
4
6
8
10
12
14
16
18
0
2
4
6
8
10
12
14
16
18
FREQUENCY (Ghz)
FREQUENCY (Ghz)
0 dB
6 dB
0 dB
6 dB
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
8 - 3
Application Support: Phone: 1-800-ANALOG-D
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
8
Absolute Maximum Ratings
RF Input Power
+18 dBm
State
V1
Bias Condition
DC Voltage on I Pin
+/- 0.8V
-5 to 0V @ 9 mA Typical.
-5 to 0V @ 9 mA Typical.
Control Voltage Range
Storage Temperature
Operating Temperature
Junction Temperature
Junction to Case Thermal Resistance
ESD Sensitivity (HBM)
0.3 to -6V
-65 to +150 °C
-40 to +85 °C
+175 °C
V2
10 °C/W
Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
3.05
2.90 SQ
2.75
0.36
0.30
0.24
0.08
BSC
PIN 1
INDICATOR
10
12
PIN 1
9
1
3
0.50
BSC
1.60
1.50 SQ
1.40
EXPOSED
PAD
7
6
4
0.32
BSC
BOTTOM VIEW
TOP VIEW
SIDE VIEW
1.00 REF
2.10 BSC
0.90
0.80
0.70
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SEATING
PLANE
SECTION OF THIS DATA SHEET.
12-Terminal Ceramic Leadless Chip Carrier [LLC]
(E-12-4)
Dimensions shown in millimeters
Package Information
Part Number
Package Body Material
Alumina, White
Lead Finish
MSL Rating
MSL3 [1]
Package Marking [2]
346A
XXXX
HMC346ALC3B
Gold over Nickel
[[1] Max peak reflow temperature of 260 °C
[2] 4-Digit lot number XXXX
For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
8 - 4
Application Support: Phone: 1-800-ANALOG-D
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
8
Pin Descriptions
Pin Number
Function
GND
Description
Interface Schematic
Package bottom has exposed metal paddle that must also be
connected to PCB RF ground.
1, 3, 7, 9
2, 8
This pin is DC coupled and matched to 50 Ohm. Blocking
capacitors are required if the RF line potential is not equal to
0V.
RF1
RF2
4, 6
V2, V1
Control input (master).
Control input (slave).
600
5
I
This pin may be connected to PCB RF/DC ground.
Performance will not be affected.
10, 11, 12
N/C
Single-Line Control Driver
50
50
600
600
600
External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges from 0 Volts
(min. attenuation) to -5.0 Volts (max. attenuation.)
For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
8 - 5
Application Support: Phone: 1-800-ANALOG-D
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
8
Evaluation PCB
List of Materials for Evaluation EV1HMC346ALC3B [1]
The circuit board used in the application should
be generated with proper RF circuit design tech-
niques. Signal lines at the RF ports should be 50
Ohm impedance and the package ground leads
and package bottom should be connected directly
to the PCB RF ground plane, similar to that shown
above. The evaluation circuit board shown above
is available from Analog Devices Inc. upon request.
Item
Description
J1 - J2
J3 - J7
U1
PCB Mount SMA RF Connector
DC Pin
HMC346ALC3B VVA
109739-1 Evaluation PCB
[2]
PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
8 - 6
Application Support: Phone: 1-800-ANALOG-D
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