HMC346MS8GE [HITTITE]
GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz; 砷化镓表面贴装可变电压衰减器， DC - 8 GHz的
| 型号： | HMC346MS8GE |
| 厂家： | 
HITTITE MICROWAVE CORPORATION |
| 描述： | GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz |
| 文件： | 总6页 (文件大小：236K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HMC346MS8G / 346MS8GE
v07.1008
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
5
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 HMC346MS8G & HMC346MS8GE are absorp-
tive Voltage Variable Attenuators (VVA) in 8 lead sur-
face-mount packages 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 con-
trol RF signal levels over a 30 dB amplitude range.
Applications include AGC circuits 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
1.5
Max
2.5
Units
dB
Insertion Loss
Attenuation Range
Return Loss
DC - 8 GHz
DC - 8 GHz
DC - 8 GHz
27
5
32
dB
10
dB
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
2
8
ns
ns
Switching Characteristics
Min. Atten.
Atten. >2 dB
+8
-2
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
+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
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HMC346MS8G / 346MS8GE
v07.1008
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
5
Relative Attenuation
Insertion Loss vs. Temperature
0
-1
-2
-3
-4
0
-10
-20
-30
-40
T+25C
T -40C
T+85C
0
1
2
3
4
5
6
7
8
9
10
30
30
0
1
2
3
4
5
6
7
8
8
8
9
9
9
10
10
10
FREQUENCY (GHz)
FREQUENCY (GHz)
Relative Attenuation vs.
Control Voltage @ 4 GHz
Return Loss vs. Attenuation
0
0
-5
-10
-15
-0.5
-1
V2 -40C
V2 +25C
V2 +85C
-1.5
-20
-2
MIN
15 dB
MAX
-25
-30
-2.5
V1 +85C
15
V1 +25C
20
V1 -40C
25
-3
0
1
2
3
4
5
6
7
0
5
10
RELATIVE ATTENUATION (dB)
FREQUENCY (GHz)
Relative Attenuation vs.
Control Voltage @ 8 GHz
Relative Phase
140
0
max
25 dB 30 dB
120
100
-0.5
-1
20 dB
V2 -40C
15 dB
10 dB
V2 +25C
V2 +85C
80
5 dB
-1.5
-2
60
40
20
0
-2.5
V1 +85C
15
V1 +25C
20
V1 -40C
25
-3
0
1
2
3
4
5
6
7
0
5
10
FREQUENCY (GHz)
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 - 103
HMC346MS8G / 346MS8GE
v07.1008
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
Input Third Order
Intercept vs Attenuation*
Input Second Order
Intercept vs. Attenuation*
5
70
30
60
50
40
25
0 dB
3 dB
6 dB
20
15
10
5
10 dB
30
0 dB
3 dB
20
6 dB
10 dB
10
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
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
8
FREQUENCY (GHz)
FREQUENCY (GHz)
Second Harmonic vs. Attenuation
80
70
60
50
40
30
20
0 dB
3 dB
6 dB
10 dB
0
1
2
3
4
5
6
7
8
FREQUENCY (GHz)
*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
5 - 104
HMC346MS8G / 346MS8GE
v07.1008
GaAs MMIC 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 -5 V
-65 to +150 °C
-40 to +85 °C
Class 1A
Outline Drawing
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS].
3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
5. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO
PCB RF GROUND.
Package Information
Part Number
Package Body Material
Lead Finish
MSL Rating
MSL1 [1]
Package Marking [3]
H346
XXXX
HMC346MS8G
HMC346MS8GE
Low Stress Injection Molded Plastic
Sn/Pb Solder
H346
XXXX
MSL1 [2]
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
[1] Max peak reflow temperature of 235 °C
[2] Max peak reflow temperature of 260 °C
[3] 4-Digit lot number XXXX
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 - 105
HMC346MS8G / 346MS8GE
v07.1008
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
5
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
4
5
I
Control Input (Slave).
Not Connected.
N/C
Single-Line Control Driver
External op-amp control circuit maintains impedance match while attenuation is varied. Input control 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 - 106
HMC346MS8G / 346MS8GE
v07.1008
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
5
Evaluation PCB
List of Materials for Evaluation PCB 104091 [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
HMC346MS8G / HMC346MS8GE
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, 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 - 107
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