V 2.00
F e a t u r e s
Single Positive Voltage Control 0 to +5 Vo l t s
30 dB Voltage Variable Attenuation
2 dB Linearity from BSL
Low DC Power Consumption
Te m p e r a t u re Range: -40C to +85C
Low-Cost SOIC 8 Plastic Package
Tape and Reel Packaging Av a i l a b l e
Fast Switching Speed
D e s c r i p t i o n
M/A-COM's AT-110 is a linear GaAs MMIC voltage
variable absorptive attenuator in a low-cost SOIC
8-lead surface mount plastic package. The AT-110 has
a faster switching speed than the AT-108 or AT- 1 0 9 .
The AT-110 is ideally suited for use where linear
attenuation fine tuning and very low power com-
sumption are re q u i red. Typical applications include
r a d i o ,
c e l l u l a r, GPS equipment and automatic gain/level
c o n t rol circ u i t s .
The AT-110 is fabricated with a monolithic GaAs
MMIC using a mature 1-micron process. The pro c e s s
f e a t u res full chip passivation for increased perf o r-
mance and re l i a b i l i t y .
Part Number
Package
AT-110
SOIC 8-Lead Plastic Package
AT-110TR
Forward Tape & Reel*
AT-110RTR
Reverse Tape & Reel*
Parameter
Test Conditions
Units
Min.
Typ.
Max.
Insertion Loss
0.5 - 1.0 GHz
dB
2.8
3.0
1.0 - 2.0 GHz
dB
3.3
3.6
Attenuation
0.5 - 16 GHz
dB
30
1.0 - 26 GHz
dB
25
Flatness
0.5 - 1.0 GHz
dB
0.5
0.8
(Peak-to-Peak)
1.0 - 2.0 GHz
dB
1.2
1.5
VSWR
2:1
Trise, Tfall
10% to 90% RF, 90% to 10% RF
S
0.2
Ton, Toff
50% Control to 90% RF, Control to 10% RF
S
0.2
Transients
In-band
mV
70
1. All measurements at 1 GHz in a 50-
system, unless otherwise specified.The RF ports must be blocked outside of the package
from ground or any other voltage.
Voltage Variable Absorptive Attenuator, 30 dB
0.5 - 2 GHz
AT-110
Typical Electrical Specifications
1
, T
A
= +25C
SO-8
q
q
q
q
q
q
q
q
Ordering Information
*
If specific reel size is required, consult factory for part number
assignment.
V 2.00
Parameter
Absolute Maximum
Maximum Input Power
+21 dBm
Supply Voltage VCC
-1 V, +8 V
Control Voltage VC
-1 V, VCC +0.5 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Absolute Maximum Ratings
1
Functional Schematic
1. Operation of this device above any one of these parameters may
cause permanent damage.
VCC = +5 VDC 0.5 VDC @ 300 A max.
VC = 0 VDC to +5 VDC @ 6 mA max.
External DC blocking capacitors are required on all RF ports.
Typical Performance
RELATIVE ATTENUATION
vs
CONTROL VOLTAGE
@ +25C, F = 1800 MHz
0
-5
-10
-15
-20
-25
-30
-35
5
4
3
2
1
0
CONTROL VOLTAGE (VOLTS)
ATTENUATION
vs
CONTROL VOLTAGE
@ +25C, F = 900 MHz
0
-10
-20
-30
-40
5
4
3
2
1
0
CONTROL VOLTAGE (VOLTS)
INSERTION LOSS
vs
FREQUENCY
4.0
3.0
2.0
1.0
0
0.5
1.0
1.5
2.0
FREQUENCY (GHz)
ATTENUATION
vs
TEMPERATURE,
NORMALIZED TO +25C, F = 900 MHz
3
2
1
0
-1
-2
-3
5
4
3
2
1
0
CONTROL VOLTAGE (VOLTS)
-40C
+85C
Voltage Variable Absorptive Attenuator, 30 dB
AT-110
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