HMC346AMS8GE [ADI]
HMC346AMS8GE;
ADI 
HMC346AMS8GE
v02.0717
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
8
Typical Applications
Features
This attenuator is ideal for use as a VVA
for DC - 8 GHz applications:
Wide Bandwidth: DC - 8 GHz
Low Phase Shift vs. Attenuation
32 dB Attenuation Range
• Point-to-Point Radio
• VSAT Radio
General Description
Functional Diagram
The HMC346AMS8GE is absorptive Voltage Variable
Attenuators (VVA) in 8 lead surface-mount packages
operating from DC - 8 GHz. It features an on-chip ref-
erence attenuator 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. Applications include AGC cir-
cuits and temperature compensation of multiple gain
stages in microwave point-to-point and VSAT radios.
Electrical Specifications, TA = +25° C, 50 Ohm system
Parameter
Min
Typical
2.1
Max
3.1
Units
dB
Insertion Loss
Attenuation Range
Return Loss
DC - 8 GHz
DC - 8 GHz
DC - 8 GHz
23
5
28
dB
10
dB
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
8
16
ns
ns
Switching Characteristics
Min. Atten.
Atten. >2 dB
+8
+4
dBm
dBm
Input Power for 0.25 dB Compression (0.5 - 8 GHz)
Input Third Order Intercept (0.5 - 8 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten.
Atten. >2 dB
+30
+10
dBm
dBm
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
HMC346AMS8GE* PRODUCT PAGE QUICK LINKS
Last Content Update: 11/29/2017
COMPARABLE PARTS
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DESIGN RESOURCES
• HMC346AMS8GE Material Declaration
• PCN-PDN Information
EVALUATION KITS
• Quality And Reliability
• HMC346AMS8G Evaluation Board
• Symbols and Footprints
DOCUMENTATION
Data Sheet
DISCUSSIONS
View all HMC346AMS8GE EngineerZone Discussions.
• HMC346AMS8GE: GaAs MMIC SMT Voltage-Variable
Attenuator, DC - 8 GHz Data Sheet
SAMPLE AND BUY
Visit the product page to see pricing options.
REFERENCE MATERIALS
Product Selection Guide
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
• RF, Microwave, and Millimeter Wave IC Selection Guide
2017
DOCUMENT FEEDBACK
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HMC346AMS8GE
v02.0717
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
8
Relative Attenuation
Insertion Loss vs. Temperature
0
0
-1
-2
-3
-4
-5
-10
-20
-30
-40
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
FREQUENCY (GHz)
+85 C
5 dB
10dB
15 dB
20 dB
25 dB
30dB
Max
+25 C
'-40 C
Relative Attenuation vs.
Return Loss vs. Attenuation
Control Voltage @ 4 GHz
0
0
-5
-10
-15
-20
-25
-30
V2 -40C
-1
V2 +25C
V2 +85C
-2
-3
-4
V1 -40C
V1 +85C
V1 +25C
0
1
2
3
4
5
6
7
8
9
10
-5
FREQUENCY (GHz)
15 dB
0
5
10
15
20
25
30
Min
Max
RELATIVE ATTENUATION (dB)
Relative Attenuation vs.
Relative Phase
180
Control Voltage @ 8 GHz
0
150
120
90
60
30
0
-1
V2 -40C
V2 +25C
V2 +85C
-2
-3
-4
V1 -40C
V1 +25C
V1 +85C
0
1
2
3
4
5
6
7
8
9
10
-5
FREQUENCY (GHz)
0
5
10
15
20
25
30
5 dB
10dB
15 dB
20 dB
25 dB
30dB
Max
RELATIVE ATTENUATION (dB)
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
HMC346AMS8GE
v02.0717
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
Input Third Order
Intercept vs Attenuation*
Input Second Order
Intercept vs. Attenuation*
8
90
80
70
60
50
40
30
20
10
40
35
30
25
20
15
10
5
0
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
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
20
1 dB Compression vs. Attenuation
20
15
10
5
15
10
5
0
0
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
FREQUENCY (Ghz)
FREQUENCY (Ghz)
0 dB
5 dB
0 dB
5 dB
Second Harmonic vs. Attenuation
90
80
70
60
50
40
30
20
10
0
1
2
3
4
5
6
7
8
FREQUENCY (GHz)
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 - 3
Application Support: Phone: 1-800-ANALOG-D
HMC346AMS8GE
v02.0717
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
8
Absolute Maximum Ratings
RF Input Power
+18 dBm
State
V1
Bias Condition
DC Voltage on I Pin
+/- 0.8V
-5 to 0V @ 9mA typical
-5 to 0V @ 9mA typical
Control Voltage Range
Storage Temperature
Operating Temperature
Junction Temperature
Junction to Case Thermal Resistance
ESD Sensitivity
+0.3 to -6 V
-65 to +150 °C
-40 to +85 °C
+175 °C
V2
10 °C/W
Class 1 A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
3.10
3.00
2.90
2.18
1.98
1.78
8
5
4
5.05
4.90
4.75
1.52
1.32
1.12
3.10
3.00
2.90
EXPOSED
PAD
1
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
TOP VIEW
SIDE VIEW
BOTTOM VIEW
0.65
BSC
1.95 BSC
SECTION OF THIS DATA SHEET.
0.94
0.86
0.78
1.10
MAX
0.25 GAGE
0.23
0.08
PLANE
END VIEW
6°
0°
0.13
MAX
0.40
0.33
0.25
0.70
0.55
0.40
0.95
REF
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA-T
8-Lead Mini Small Outline Package with Exposed Pad [MINI_SO_EP]
(RH-8-3)
Dimensions shown in millimeters
Package Information
Part Number
Package Body Material
Lead Finish
MSL Rating
MSL3 [1]
Package Marking [3]
H346A
XXXX
HMC346AMS8GE
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
[[1] Max peak reflow temperature of 260 °C
[3] 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
HMC346AMS8GE
v02.0717
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
8
Pin Descriptions
Pin Number
Function
Description
Interface Schematic
RF1
RF2
This pin is DC coupled and matched to 50 Ohm. Blocking
capacitors are required if RF line potential is not equal to 0V.
1, 8
2, 7
GND
This pin must be DC grounded.
Control Input (Master).
3, 6
V2, V1
600
4
5
I
Control Input (Slave).
Not Connected.
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 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
HMC346AMS8GE
v02.0717
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
8
Evaluation PCB
List of Materials for Evaluation EV1HMC346AMS8G [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
HMC346AMS8GE
104089 Eval Board
[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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