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| 型号： | AV850M2-A2 |
| 元件分类： | 衰减器 |
| 英文描述： | 18000 MHz - 40000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 4 dB INSERTION LOSS-MAX |
| 文件页数： | 4/4页 |
| 文件大小： | 539K |
| 代理商： | AV850M2-A2 |
18–40 GHz Surface Mount Voltage Variable Attenuator
AV850M2-A2
4
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
Specifications subject to change without notice. 6/00A
“Alpha Two” Surface Mount Package
Handling and Mounting
Millimeterwave components require careful mounting
design to maintain optimal performance. The Alpha Two
surface mount package (patent pending) provides a
rugged and repeatable electrical connection using
standard solder techniques.
Handling
The Alpha Two surface mount package is very rugged.
However, due to ceramic’s brittle nature, one should
exercise care when handling with metal tools. Do not apply
heavy pressure to the lid. Vacuum tools may be used to
pick and place this part.
Only personnel trained in both ESD precautions and
handling precautions should be allowed to handle these
packages.
Package Construction
The Alpha Two surface mount package consists of a base
and a lid. The package base is ceramic with filled vias and
plated castellations. The package lid is unplated alumina.
The lid seal is epoxy.
Mounting Design
The Alpha Two surface mount package is installed on top
of a printed circuit board on a specially designed footprint.
Mounting footprint geometry will be supplied by Alpha
Industries in electronic formats or paper drawing.
Mounting the Package
The Alpha Two surface mount package is compatible with
high-volume surface mount installation using solder. RF
and DC connections are accomplished with metallized
edge castellations that hold solder fillets. Ground
connections are accomplished by both metallized edge
castellations and filled vias to the bottom of the package.
Care should be taken to ensure that there are no voids
or gaps in the solder so that a good RF, DC, and ground
contact is maintained.
Alpha Two Surface Mount Package Installation
Printed Ccircuit Board
Rogers 4003
0.008" (0.20 mm) Thick
Electrically & Thermally
Conductive Ground Plane
RF In
RF Out
DC Lines
Solder Fillets
Footprint Geometry for Alpha Two
Surface Mount Package
RF In
RF Out
DC Connections
64 Via Holes
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