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查询HMC346LC3B供应商
HMC346LC3B
v00.1204
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
9
ATTENUATORS - SMT
Typical Appli cations
The HMC346LC3B is ideal for:
• Test Instrumentation
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
Functional Diagram
Features
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
General Description
The HMC346LC3B is an absorptive Voltage Variable
Attenuator (VVA) in a leadless “Pb free” RoHS compliant SMT mount plastic 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.
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Electrical Specifications, T
Parameter Min Typical Max Units
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
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250 -3373
= +25° C, 50 Ohm system
A
DC - 10 GHz
DC - 14 GHz
DC - 18 GHz
DC - 12 GHz
DC - 18 GHz
DC - 18 GHz 10 dB
Min. Atten:
Atten. >2 dB:
Min. Atten:
Atten. >2 dB:
tON, tOFF (50% CTL to 10/90% RF):
tRISE, tFALL (10/90% RF):
Order On-line at www.hittite.com
26
22
1.5
2.2
2.8
30
26
+8
-4
+25
+10
2.0
2.7
3.5
2
8
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
ns
ns
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v00.1204
HMC346LC3B
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Insertion Loss vs. Temperature
0
-0.5
-1
-1.5
-2
-2.5
-3
INSERTION LOSS (dB)
-3.5
-4
024681012141618
FREQUENCY (GHz)
+25C
+85C
-40C
Return Loss vs. Attenuation
0
-5
-10
-15
-20
-25
RETURN LOSS (dB)
-30
-35
024681012141618
FREQUENCY (GHz)
MIN
5 dB
MAX
Relative Attenuation
0
-5
-10
-15
-20
-25
ATTENUATION (dB)
-30
-35
-40
024681012141618
FREQUENCY (GHz)
Relative Attenuation vs.
Control Voltage @ 10 GHz
0
-0.5
-1
-1.5
-2
CONTROL VOLTAGE (Vdc)
-2.5
-3
0 5 10 15 20 25 30
RELATIVE ATTENUATION (dB)
V1
V2
9
ATTENUATORS - SMT
Relative Phase vs. Attenuation
180
160
140
120
100
80
60
RELATIVE PHASE (deg)
40
20
0
024681012141618
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
5 dB
10dB
15dB
20dB
25dB
30dB
Max
FREQUENCY (GHz)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250 -3373
Order On-line at www.hittite.com
Input IP3 vs. Attenuation*
30
25
20
15
10
INPUT IP3 (dBm)
5
0
024681012141618
FREQUENCY (GHz)
0 dB
3 dB
6 dB
10 dB
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9
Input IP2 vs. Attenuation*
70
60
HMC346LC3B
v00.1204
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Second Harmonic
vs. Attenuation, Pin = -8 dBm
80
70
ATTENUATORS - SMT
50
40
30
INPUT IP2 (dBm)
20
10
024681012141618
FREQUENCY (GHz)
0 dB
3 dB
6 dB
10 dB
60
50
40
SECOND HARMONIC (dBc)
30
20
024681012141618
FREQUENCY (GHz)
0 dB
3 dB
6 dB
10 dB
0.25 dB Compression vs. Attenuation 1 dB Compression vs. Attenuation
15
10
5
0 dB (REF)
0
INPUT .25dB (dBm)
-5
-10
024681012141618
FREQUENCY (GHz)
6 dB
20
15
10
5
INPUT P1dB (dBm)
0
-5
024681012141618
FREQUENCY (GHz)
0 dB (REF)
6 dB
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*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250 -3373
Order On-line at www.hittite.com
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v00.1204
Absolute Maximum Ratings
RF Input Power +18 dBm
Control Voltage Range +1.0 to -5.0 Vdc
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
HMC346LC3B
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
9
Outline Drawing
ATTENUATORS - SMT
NOTES:
1. PACK AGE BODY MATERIAL: A LUMINA
2. L EAD AND GR OUND PADDLE PL ATING: GOLD FL ASH OVER Ni
3. DIMENSIONS ARE IN INCHES [MILLIMETERS]
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
5. PACK AGE WARP SHAL L NOT EXCEED 0.0 5mm
6. A LL GROUN D LEADS AN D GROUND PADD LE MUST BE SO LDERED
TO PCB RF GROUND
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250 -3373
Order On-line at www.hittite.com
9 - 93
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9
HMC346LC3B
v00.1204
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.
ATTENUATORS - SMT
2, 8
4, 6 V2, V1 Control input (master).
5 I Control input (slave).
10, 11, 12 N/C
RF1
RF2
Single-Line Control Driver
This pin is DC coupled and matched to 50 Ohm. Blocking
capacitors are required if the RF line potential is not equal to
0V.
This pin may be connected to PCB RF/DC ground.
Performance will not be affected.
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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.)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250 -3373
Order On-line at www.hittite.com
Page 6
Evaluation PCB
HMC346LC3B
v00.1204
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
9
List of Material for Evaluation PCB 109741
Item Description
J1 - J2 PCB Mount SMA RF Connector
J3 - J7 DC Pin
U1 HMC346LC3B VVA
[2]
PCB
[1] Reference this number when ordering complete
evaluation PCB
[2] Circuit Board Material: Rogers 4350
109739-1 Evaluation PCB
[1]
The circuit board used in the nal application
should be generated with proper RF circuit design
techniques. 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.
ATTENUATORS - SMT
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250 -3373
Order On-line at www.hittite.com
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