Voltage Variable Absorptive Attenuator
40 dB, 0.5-3.0 GHz
Features
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Single Positive Voltage Control: 0 to +5 Volts
40 dB Attenuation Range at 900 MHz
± 2 dB Linearity from BSL
Low DC Power Consumption
SOIC-8 Plastic Package
Tape and Reel Packaging Available
AT-108
V6
Functional Schematic
1,2,3,4
8
7
6
5
Description
M/A-COM's AT-108 is a GaAs MESFET MMIC
voltage variable absorptive attenuator in a low cost
SOIC-8 surface mount plastic package. The AT-108
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-108 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. V
cc
= +5 VDC @ 50 µA maximum.
2. V
c
= 0 VDC to +5 VDC @ 50 µA maximum.
3. External DC blocking capacitors are requirements on all RF
ports.
4. 39 pF used for data measurements.
1
2
3
4
Pin Configuration
Ordering Information
Part Number
AT-108
AT-108TR
Pin No.
Package
Bulk Packaging
1000 piece reel
1
2
3
4
Function
Ground
Ground
RF Port
V
CC
Pin No.
5
6
7
8
Function
V
C
Ground
RF Port
Ground
Note: Reference Application Note M513 for reel size
information.
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
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
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
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North America
Tel: 800.366.2266 / Fax: 978.366.2266
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Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
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Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
MA-COM [ M/A-COM TECHNOLOGY SOLUTIONS, INC. ]
