HMC346MS8GETR [HITTITE]
暂无描述;
| 型号： | HMC346MS8GETR |
| 厂家： | 
HITTITE MICROWAVE CORPORATION |
| 描述： | 暂无描述 射频和微波 射频衰减器 微波衰减器 |
| 文件： | 总6页 (文件大小：266K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HMC346MS8G
v03.0304
MICROWAVE CORPORATION
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
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
9
General Description
Functional Diagram
The HMC346MS8G is an absorptive Voltage Vari-
able Attenuator (VVA) in an 8 lead 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 tem-
perature 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
DC - 8 GHz
DC - 8 GHz
DC - 8 GHz
Attenuation Range
Return Loss
27
5
32
dB
10
dB
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
2
8
ns
ns
Input Power for 0.25 dB Compression (0.5 - 8 GHz)
Min. Atten.
Atten. >2 dB
+8
-2
dBm
dBm
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:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 74
HMC346MS8G
v03.0304
MICROWAVE CORPORATION
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
InseGrtiaoAn sLoMssMvIsC.TeSmUpBer-aHtuAreRMONICALLY RPeUlaMtivPeEADtteMnuIXatEioRn 17 - 25 GHz
0
-1
-2
-3
-4
0
-5
9
-10
-15
-20
-25
T+25C
T -40C
T+85C
-30
-35
-40
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
FREQUENCY (GHz)
Relative Attenuation vs.
Control Voltage @ 4 GHz
Return Loss vs. Attenuation
0
0
-0.5
-1
-5
V2 -40C
-10
-15
-20
-25
-30
V2 +25C
V2 +85C
-1.5
-2
MIN
15 dB
MAX
-2.5
V1 +85C
15
V1 +25C
20
V1 -40C
25
-3
0
1
2
3
4
5
6
7
8
9
10
0
5
10
30
RELATIVE ATTENUATION (dB)
FREQUENCY (GHz)
Relative Attenuation vs.
Control Voltage @ 8 GHz
Relative Phase
0
-0.5
-1
140
130
120
110
100
90
max
25 dB
30 dB
20 dB
15 dB
V2 -40C
10 dB
V2 +25C
80
V2 +85C
-1.5
5 dB
70
60
50
40
30
20
10
0
-2
-2.5
V1 +85C
15
V1 +25C
20
V1 -40C
25
-3
0
1
2
3
4
5
6
7
8
9
10
0
5
10
30
RELATIVE ATTENUATION (dB)
FREQUENCY (GHz)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 75
HMC346MS8G
v03.0304
MICROWAVE CORPORATION
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
Input Third Order
Input Second Order
Intercept vs Attenuation*
Intercept vs. Attenuation*
30
70
0 dB
0 dB
60
25
9
50
20
15
3 dB
10 dB
40
10 dB
30
6 dB
10
5
20
6 dB
3 dB
10
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
FREQUENCY (GHz)
FREQUENCY (GHz)
1 dB Compression vs. Attenuation
0.25 dB Compression vs. Attenuation
20
20
0 dB (REF)
5 dB
15
15
10
5
10
5
0 dB (REF)
5 dB
0
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
0 dB
70
60
10 dB
50
6 dB
40
30
20
3 dB
3
0
1
2
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:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 76
HMC346MS8G
v03.0304
MICROWAVE CORPORATION
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
Absolute Maximum Ratings
RF Input Power
+18 dBm
Control Voltage Range
Storage Temperature
Operating Temperature
+1.0 to -5.0 Vdc
-65 to +150 °C
-40 to +85 °C
9
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEADFRAME MATERIAL: COPPER ALLOY
3. LEADFRAME PLATING: Sn/Pb SOLDER
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
6. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
7. 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:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 77
HMC346MS8G
v03.0304
MICROWAVE CORPORATION
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
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
9
2, 7
GND
This pin must be DC grounded.
3, 6
V2, V1
Control Input (Master).
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:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 78
HMC346MS8G
v03.0304
MICROWAVE CORPORATION
GaAs MMIC SMT VOLTAGE-VARIABLE
ATTENUATOR, DC - 8 GHz
Evaluation PCB
9
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 con-
nected 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.
List of Material
Item
Description
J1 - J2
J3 - J7
U1
PC Mount SMA RF Connector
DC PIN
HMC346MS8G
104089 Eval Board
PCB*
*Circuit Board Material: Rogers 4350
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 79
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