AT-635
Voltage Variable Absorptive Attenuator
35 dB, DC - 2.0 GHz
Rev. V7
Functional Schematic
Features
•
•
•
•
•
•
•
M/A-COM Products
35 dB Voltage Variable Attenuation at 1 GHz
Single Voltage Control: 0 to -4 Volts
Low DC Power Consumption
Nanosecond Switching Speed
Temperature Range: -40°C to +85°C
SOIC-14 Plastic Package
Tape and Reel Packaging Available
14
13
12
11
10
9
8
1
2
3
4
5
6
7
Description
M/A-COM’s AT-635 is a GaAs MMIC voltage
variable absorptive attenuator in a low cost SOIC
14-lead surface mount plastic package. The AT-635
is ideally suited for use where attenuation fine
tuning, fast switching and very low power
consumption are required.
Typical applications include radio, cellular, GPS
equipment and other automatic gain/level control
circuits.
Pin Configuration
Ordering Information
Pin No.
Function
VC
8
RF2
2
Ground
9
Ground
3
Ground
10
Ground
4
Ground
11
Ground
5
Ground
12
Ground
6
1,2
Function
1
The AT-635 is fabricated with a monolithic GaAs
MMIC using a mature 1-micron process. The
process features full chip passivation for increased
performance and reliability.
Pin No.
Ground
13
Ground
7
Ground
14
RF1
Part Number
Package
AT-635
Bulk Packaging
AT-635TR
Tape and Reel
Parameter
Absolute Maximum
AT-635SMB
Sample Board
Input Power
+21 dBm
Control Voltage
-8.5 V < VC < +5 V
Operating Temperature
-40°C to +85°C
Storing Temperature
-65°C to +150°C
1. Reference Application Note M513 for reel size information.
2. All sample boards include 5 loose parts.
Absolute Maximum Ratings 3,4
3. Exceeding any one or combination of these limits may cause
permanent damage to this device.
4. M/A-COM does not recommend sustained operation near
these survivability limits.
1
ADVANCED: Data Sheets contain information regarding a product M/A-COM is considering for
• North America Tel: 800.366.2266 / Fax: 978.366.2266
development. Performance is based on target specifications, simulated results, and/or prototype
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
measurements. Commitment to develop is not guaranteed.
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM has under developVisit www.macom.com for additional data sheets and product information.
ment. Performance is based on engineering tests. Specifications are typical. Mechanical outline has
been fixed. Engineering samples and/or test data may be available. Commitment to produce in
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or
volume is not guaranteed.
information contained herein without notice.