HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Features
Wide Bandwidth: DC - 18 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
Simplified Voltage Control
RoHS Compliant 3 x 3 mm SMT Package
8
ATTENUATORS - SMT
Typical Applications
The HMC346ALC3B is ideal for:
• Test Instrumentation
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
Functional Diagram
General Description
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,
T
A
= +25° C, 50 Ohm system
Parameter
DC - 10 GHz
DC - 14 GHz
DC - 18 GHz
DC - 12 GHz
DC - 18 GHz
DC - 18 GHz
Min. Atten:
Atten. >2 dB:
Min. Atten:
Atten. >2 dB:
tRISE, tFALL (10/90% RF):
tON, tOFF (50% CTL to 10/90% RF):
26
20
Min
Typical
2.0
2.8
3.3
30
24
10
+5
+4
+30
+8
8
16
Max
2.5
3.2
4.0
Units
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
ns
ns
Insertion Loss
Attenuation Range
Return Loss
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)
Switching Characteristics
8-1
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
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Insertion Loss vs. Temperature
0
Relative Attenuation
0
8
ATTENUATORS - SMT
8-2
INSERTION LOSS (dB)
-2
ATTENUATION (dB)
-1
-10
-20
-3
-30
-4
-40
0
2
4
6
8
10
12
14
16
18
-5
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
+25 C
+85 C
-40 C
FREQUENCY (GHz)
5 dB
10dB
15 dB
20 dB
25 dB
30dB
Max
Return Loss vs. Attenuation
0
-5
RETURN LOSS (dB)
Relative Attenuation vs.
Control Voltage @ 10 GHz
0
CONTROL VOLTAGE (Vdc)
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-4
-10
-15
-20
-25
-30
-35
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
Min
5 dB
Max
0
5
10
15
20
25
30
RELATIVE ATTENUATION (dB)
V1
V2
Relative Phase vs. Attenuation
180
150
120
90
60
30
0
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
5 dB
10dB
15 dB
20 dB
25 dB
30dB
Max
Input IP3 vs. Attenuation*
40
35
INPUT IP3 (dBm)
RELATIVE PHASE (deg)
30
25
20
15
10
5
0
0
2
4
6
8
10
12
14
16
18
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
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
ATTENUATORS - SMT
Input IP2 vs. Attenuation*
90
80
70
SECOND HARMONIC (dBc)
80
70
60
50
40
30
20
10
IP2 (dBm)
60
50
40
30
20
10
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
0 dB
3 dB
6 dB
10 dB
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
0 dB
3 dB
6 dB
10 dB
0.25 dB Compression vs. Attenuation
20
1 dB Compression vs. Attenuation
20
INPUT 0.25 dB (dBm)
10
INPUT P1dB (dBm)
15
15
10
5
5
0
0
2
4
6
8
10
12
14
16
18
FREQUENCY (Ghz)
0 dB
6 dB
0
0
2
4
6
8
10
12
14
16
18
FREQUENCY (Ghz)
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
Application Support: Phone: 1-800-ANALOG-D
8-3
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Absolute Maximum Ratings
RF Input Power
DC Voltage on I Pin
Control Voltage Range
Storage Temperature
Operating Temperature
Junction Temperature
Junction to Case Thermal Resistance
ESD Sensitivity (HBM)
+18 dBm
+/- 0.8V
0.3 to -6V
-65 to +150 °C
-40 to +85 °C
+175 °C
10 °C/W
Class 1A
State
V1
V2
Bias Condition
-5 to 0V @ 9 mA Typical.
-5 to 0V @ 9 mA Typical.
8
ATTENUATORS - SMT
03-02-2017-A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
12-Terminal Ceramic Leadless Chip Carrier [LCC]
(E-12-4)
Dimensions shown in millimeters.
Outline Drawing
PIN 1
INDICATOR
3.05
2.90 SQ
2.75
0.08
BSC
10
0.36
0.30
0.24
12
PIN 1
1
0.50
BSC
9
EXPOSED
PAD
7
3
1.60
1.50 SQ
1.40
TOP VIEW
0.90
0.80
0.70
SEATING
PLANE
PKG-004837
0.32
BSC
6
4
BOTTOM VIEW
SIDE VIEW
1.00 REF
2.10 BSC
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
12-Terminal Ceramic Leadless Chip Carrier [LLC]
(E-12-4)
Dimensions shown in millimeters
Package Information
Part Number
HMC346ALC3B
Package Body Material
Alumina, White
Lead Finish
Gold over Nickel
MSL Rating
MSL3
[1]
Package Marking
[2]
346A
XXXX
[[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
Application Support: Phone: 1-800-ANALOG-D
8-4
HMC346ALC3B
v02.0717
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
8
ATTENUATORS - SMT
Pin Descriptions
Pin Number
1, 3, 7, 9
Function
GND
Description
Package bottom has exposed metal paddle that must also be
connected to PCB RF ground.
This pin is DC coupled and matched to 50 Ohm. Blocking
capacitors are required if the RF line potential is not equal to
0V.
Interface Schematic
2, 8
RF1
RF2
4, 6
V2, V1
Control input (master).
5
I
Control input (slave).
600
10, 11, 12
N/C
This pin may be connected to PCB RF/DC ground.
Performance will not be affected.
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
Application Support: Phone: 1-800-ANALOG-D
8-5
