For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATORS - ANALOG - SMT
1
HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
General Description
Features
Functional Diagram
Wide Bandwidth: DC - 18 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
Simplied Voltage Control
RoHS Compliant 3 x 3 mm SMT Package
Electrical Specications, TA = +25° C, 50 Ohm system
Typical Applications
The HMC346LC3B is ideal for:
• Test Instrumentation
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
The HMC346LC3B is an absorptive Voltage Variable
Attenuator (VVA) in a leadless “Pb free” RoHS
compliant SMT mount ceramic package operating from
DC - 18 GHz. It features an on-chip reference
attenuator for use with an external op-amp to provide
simple single voltage attenuation control, 0 to -3V.
The device is ideal in designs where an analog DC
control signal must control RF signal levels over a
30 dB amplitude range. The HMC346LC3B allows
the use of surface mount manufacturing techniques.
Parameter Min Typical Max Units
Insertion Loss
DC - 10 GHz
DC - 14 GHz
DC - 18 GHz
1.5
2.2
2.8
2.0
2.7
3.5
dB
dB
dB
Attenuation Range DC - 12 GHz
DC - 18 GHz
26
22
30
26
dB
dB
Return Loss DC - 18 GHz 10 dB
Input Power for 0.25 dB Compression (0.5 - 18 GHz)
Min. Atten:
Atten. >2 dB:
+8
-4
dBm
dBm
Input Third Order Intercept (0.5 - 18 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten:
Atten. >2 dB:
+25
+10
dBm
dBm
Switching Characteristics tRISE, tFALL (10/90% RF):
tON, tOFF (50% CTL to 10/90% RF):
2
8
ns
ns
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
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATORS - ANALOG - SMT
2
HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
-4
-3
-2
-1
0
0 2 4 6 8 10 12 14 16 18
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-40
-30
-20
-10
0
0 2 4 6 8 10 12 14 16 18
ATTENUATION (dB)
FREQUENCY (GHz)
-35
-30
-25
-20
-15
-10
-5
0
0 2 4 6 8 10 12 14 16 18
MIN
5 dB
MAX
RETURN LOSS (dB)
FREQUENCY (GHz)
-3
-2.5
-2
-1.5
-1
-0.5
0
0 5 10 15 20 25 30
V1
V2
CONTROL VOLTAGE (Vdc)
RELATIVE ATTENUATION (dB)
0
30
60
90
120
150
180
0 2 4 6 8 10 12 14 16 18
5 dB
10dB
15dB
20dB
25dB
30dB
Max
RELATIVE PHASE (deg)
FREQUENCY (GHz)
0
5
10
15
20
25
30
0 2 4 6 8 10 12 14 16 18
0 dB
3 dB
6 dB
10 dB
IP3 (dBm)
FREQUENCY (GHz)
Relative Attenuation
Relative Attenuation vs.
Control Voltage @ 10 GHz
Insertion Loss vs. Temperature
Return Loss vs. Attenuation
Relative Phase vs. Attenuation Input IP3 vs. Attenuation*
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
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
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATORS - ANALOG - SMT
3
HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
0.25 dB Compression vs. Attenuation 1 dB Compression vs. Attenuation
10
20
30
40
50
60
70
0 2 4 6 8 10 12 14 16 18
0 dB
3 dB
6 dB
10 dB
IP2 (dBm)
FREQUENCY (GHz)
-10
-5
0
5
10
15
0 2 4 6 8 10 12 14 16 18
0 dB (REF)
6 dB
INPUT 0.25dB (dBm)
FREQUENCY (GHz)
-5
0
5
10
15
20
0 2 4 6 8 10 12 14 16 18
0 dB (REF)
6 dB
INPUT P1dB (dBm)
FREQUENCY (GHz)
20
30
40
50
60
70
80
0 2 4 6 8 10 12 14 16 18
0 dB
3 dB
6 dB
10 dB
SECOND HARMONIC (dBc)
FREQUENCY (GHz)
Input IP2 vs. Attenuation*
Second Harmonic
vs. Attenuation, Pin = -8 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
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATORS - ANALOG - SMT
4
HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Outline Drawing
Absolute Maximum Ratings
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA
2. LEAD AND GROUND PADDLE PLATING: GOLD FLASH OVER Ni
3. DIMENSIONS ARE IN INCHES [MILLIMETERS]
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
RF Input Power +18 dBm
Control Voltage Range +1 to -5V
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1A
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC346LC3B Alumina, White Gold over Nickel MSL3 [1] H346
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
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
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATORS - ANALOG - SMT
5
HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Pin Descriptions
Pin Number Function Description Interface Schematic
1, 3, 7, 9 GND Package bottom has exposed metal paddle that must also be
connected to PCB RF ground.
2, 8 RF1
RF2
This pin is DC coupled and matched to 50 Ohm. Blocking
capacitors are required if the RF line potential is not equal to
0V.
4, 6 V2, V1 Control input (master).
5IControl input (slave).
10, 11, 12 N/C This pin may be connected to PCB RF/DC ground.
Performance will not be affected.
External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges from 0 Volts
(min. attenuation) to -3.0 Volts (max. attenuation.)
Single-Line Control Driver
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
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATORS - ANALOG - SMT
6
HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Evaluation PCB
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 Hittite Microwave Corporation upon
request.
Item Description
J1 - J2 PCB Mount SMA RF Connector
J3 - J7 DC Pin
U1 HMC346LC3B VVA
PCB [2] 109739-1 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
List of Materials for Evaluation PCB 109741 [1]
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