AT-109
Voltage Variable Absorptive Attenuator
35 dB, 0.5 - 2.0 GHz
Features
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•
•
•
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Single Positive Voltage Control: 0 to +5 Volts
35 dB Attenuation Range at 0.9 GHz
± 2 dB Linearity from BSL
Low DC Power Consumption
Temperature Range: -40°C to +85°C
SOIC-8 Plastic Package
Tape and Reel Packaging Available
Rev. V5
Functional Schematic
2,3,4
8
7
6
5
Description
M/A-COM’s AT-109 is a GaAs MMIC voltage
variable absorptive attenuator in a low-cost SOIC-8
lead surface mount plastic package. The AT-109 is
more linear than the higher attenuation range AT-
108.
The AT-109 is ideally suited for use where linear
attenuation fine tuning and very low power
consumption are required. Typical applications
include radio, cellular, GPS equipment and
automatic gain/level control circuits.
The AT-109 is fabricated with a monolithic GaAs
MMIC using a mature 1-micron process. The
process features full chip passivation for increased
performance and reliability.
1
2
3
4
2. V
CC
= +5 VDC ± 0.5 VDC @ 50 µA maximum.
3. V
C
= 0 VDC to +5 VDC @ 50 µA maximum.
4. External DC blocking capacitors are required on all RF ports.
Pin Configuration
Pin No.
1
Function
Ground
Ground
RF Port
V
CC
Pin No.
5
6
7
8
Function
V
C
Ground
RF Port
Ground
Ordering Information
Part Number
AT-109
AT-109TR
AT-109SMB
1
2
Package
SOIC 8-Lead Plastic Package
Forward Tape and Reel
Sample Test Board
3
4
Absolute Maximum Ratings
5,6
Parameter
Input Power
Supply Voltage V
CC
Control Voltage V
C
Operating Temperature
Storage Temperature
Absolute Maximum
+21 dBm
-1 V < V
CC
< +8 V
-1 V < V
C
< V
CC
+ 0.5 V
-40°C to +85°C
-65°C to +150°C
1. Reference Application Note M513 for reel size information.
5. Exceeding any one or combination of these limits may cause
permanent damage to this device.
6. M/A-COM does not recommend sustained operation near
these survivability limits.
1
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype 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 Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
MA-COM [ M/A-COM TECHNOLOGY SOLUTIONS, INC. ]
