AT-109
Voltage Variable Absorptive Attenuator
35 dB, 0.5 - 2.0 GHz
Functional Schematic 2,3,4
Features
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Rev. V5
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
8
7
6
5
1
2
3
4
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 AT108.
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.
2. VCC = +5 VDC ± 0.5 VDC @ 50 µA maximum.
3. VC = 0 VDC to +5 VDC @ 50 µA maximum.
4. External DC blocking capacitors are required on all RF ports.
Pin Configuration
AT-109
Forward Tape and Reel
AT-109SMB
Sample Test Board
Ground
5
VC
Ground
6
Ground
3
RF Port
7
RF Port
VCC
8
Ground
SOIC 8-Lead Plastic Package
AT-109TR
Function
4
Package
Pin No.
2
Part Number
Function
1
Ordering Information 1
Pin No.
1. Reference Application Note M513 for reel size information.
Absolute Maximum Ratings 5,6
Parameter
Absolute Maximum
Input Power
+21 dBm
Supply Voltage VCC
-1 V < VCC < +8 V
Control Voltage VC
-1 V < VC < VCC + 0.5 V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
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.
