HMC346G8_08 [HITTITE]
GaAs MMIC HERMETIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz; 砷化镓MMIC HERMETIC SMT可变电压衰减器， DC - 8 GHz的
| 型号： | HMC346G8_08 |
| 厂家： | 
HITTITE MICROWAVE CORPORATION |
| 描述： | GaAs MMIC HERMETIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz |
| 文件： | 总6页 (文件大小：222K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HMC346G8
v03.1008
GaAs MMIC HERMETIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
5
Typical Applications
The HMC346G8 is ideal for:
• Basestation Infrastructure
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
• Test Instrumentation
Features
Wide Bandwidth: DC - 8 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
8 Lead Hermetic SMT Package
General Description
Functional Diagram
The HMC346G8 is an absorptive Voltage Variable
Attenuator (VVA) in an 8 lead glass / metal (her-
metic) surface-mount package operating from DC -
8 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. Applications include
AGC circuits and temperature compensation of
multiple gain stages in microwave radios and test
instrumentation.
Electrical Specifications, TA = +25° C, 50 ohm system
Parameter
Min
Typical
Max
Units
DC - 6 GHz
2.0
2.0
3.0
3.5
dB
dB
Insertion Loss
DC - 8 GHz
DC - 8 GHz
DC - 8 GHz
Attenuation Range
Return Loss
30
10
dB
dB
7
2
8
ns
ns
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
+8
-2
dBm
dBm
Input Power for 0.25 dB Compression (0.5 - 8 GHz)
Min. Atten.
Atten. >2 dB
Input Third Order Intercept (0.5 - 8 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten.
Atten. >2 dB
+25
+10
dBm
dBm
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
5 - 84
HMC346G8
v03.1008
GaAs MMIC HERMETIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
Relative Attenuation, Control Voltage
Optimized for 4 GHz Operation
5
Insertion Loss vs. Temperature
0
-1
-2
-3
-4
-5
0
-10
-20
-30
-40
+ 25C
40C
-
+ 85C
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
FREQUENCY (GHz)
FREQUENCY
Relative Attenuation, Control Voltage
Optimized for 8 GHz Operation
Return Loss vs. Attenuation
0
0
-5
-10
-15
-10
-20
-30
-40
-20
-25
5 dB
10 dB
15 dB
20 dB
25 dB
30 dB
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
FREQUENCY (GHz)
Relative Attenuation vs.
Relative Attenuation vs.
Control Voltage @ 4 GHz
Control Voltage @ 8 GHz
0
0
V1 + 25C
V1 + 25C
-0.5
-1
-0.5
-1
V2 + 25C
V1 - 40C
V2 - 40C
V1 + 85C
V2 + 85C
V2 + 25C
V1 - 40C
V2 - 40C
V1 + 85C
V2 + 85C
-1.5
-2
-1.5
-2
-2.5
-3
-2.5
-3
0
5
10
15
20
25
30
0
5
10
15
20
25
30
RELATIVE ATTENUATION (dB)
RELATIVE ATTENUATION (dB)
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
5 - 85
HMC346G8
v03.1008
GaAs MMIC HERMETIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
Input Third Order
Intercept vs. Attenuation*
5
Relative Phase
60
30
5 dB
10 dB
15 dB
20 dB
25 dB
30 dB
50
40
30
20
10
0
25
0 dB
3 dB
20
6 dB
10 dB
15
10
5
0
1
2
3
4
5
6
7
8
8
8
0
1
2
3
4
5
6
7
8
FREQUENCY (GHz)
FREQUENCY (GHz)
Input Second Order
Intercept vs. Attenuation*
Second Harmonic vs. Attenuation
70
80
60
50
40
30
20
10
70
60
50
40
0 dB
0 dB
3 dB
6 dB
10 dB
3 dB
6 dB
30
20
10 dB
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
FREQUENCY (GHz)
FREQUENCY (GHz)
0.25 dB Compression vs. Attenuation
1 dB Compression vs. Attenuation
20
20
0 dB (REF)
5 dB
15
15
10
5
10
5
0
0 dB (REF)
5 dB
0
-5
-5
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
FREQUENCY (GHz)
FREQUENCY (GHz)
*Two-tone input power = -8 dBm each tone.
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
5 - 86
HMC346G8
v03.1008
GaAs MMIC HERMETIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
5
Absolute Maximum Ratings
RF Input Power
+18 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Control Voltage Range
Storage Temperature
Operating Temperature
ESD Sensitivity (HBM)
+1 to -5V
-65 to +150 °C
-40 to +85 °C
Class 1A
Outline Drawing
NOTES:
1. PACKAGE MATERIAL: ALUMINA LOADED BOROSILICATE GLASS.
2. LEAD, BASE, COVER MATERIAL: KOVAR™ (#7052 CORNING).
3. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MIN., OVER
ELECTROLYTIC NICKEL 50 MICROINCHES MIN.
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. TOLERANCES: .005 [0.13] UNLESS OTHERWISE SPECIFIED.
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
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
5 - 87
HMC346G8
v03.1008
GaAs MMIC HERMETIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
5
Pin Descriptions
Pin Number
Function
RF1, RF2
Description
Interface Schematic
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
3, 6
GND
This pin must be DC grounded.
Control Input (Master).
V2, V1
4
5
I
Control Input (Slave).
O
This pin must have an external 500 Ohm resistor to ground.
Single-Line Control Driver
Note:
External op-amp control circuit maintains imped-
ance match while attenuation is varied. Input con-
trol ranges from 0 Volts (min. attenuation) to -2.5
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
5 - 88
HMC346G8
v03.1008
GaAs MMIC HERMETIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
5
Evaluation PCB
List of Materials for Evaluation PCB 104095 [1]
The circuit board used in the final 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.
Item
Description
J1 - J2
J3 - J7
U1
PCB Mount SMA RF Connector
DC PIN
HMC346G8
[2]
PCB
104093-2 Eval Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
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
5 - 89
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