Voltage Variable Absorptive Attenuator, 35 dB
0.5 - 2 GHz
AT-109
V 2.00
Features
Single Positive Voltage Control 0 to +5 Volts
q
35 dB Attenuation Range at 0.9 GHz
q
鹵2 dB Linearity from BSL
q
Low DC Power Consumption
q
Temperature Range: -40擄C to +85擄C
q
Low-Cost SOIC 8 Plastic Package
q
Tape and Reel Packaging Available
q
SO-8
Description
M/A-COM鈥檚 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 ide-
ally suited for use where linear attenuation fine tuning
and very low power comsumption 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 reli-
ability.
Ordering Information
Part No.
AT-109
AT-109TR
AT-109RTR
Package
SOIC 8-Lead Plastic Package
Forward Tape & Reel*
Reverse Tape & Reel*
*
Electrical Specifications
1
, TA = +25擄C
Parameter
Insertion Loss
Attenuation
Flatness
(Peak-to-Peak)
VSWR
Trise, Tfall
Ton, Toff
Transients
Test Conditions
1
If specific reel size is required, consult factory for part number
assignment.
0.5 - 1.0 GHz
1.0 - 2.0 GHz
0.5 - 1.0 GHz
1.0 - 2.0 GHz
0.5 - 1.0 GHz
1.0 - 2.0 GHz
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
Unit
dB
dB
dB
dB
dB
dB
S
S
mV
Min.
Typ.
2.5
3.2
Max
2.7
3.5
35
30
鹵0.5
鹵1.2
2:1
25
35
12
鹵0.8
鹵1.5
1. All measurements at 1 GHz in a 50-
from ground or any other voltage.
system, unless otherwise specified.The RF ports must be blocked outside of the package
1
2
3
