AT-108
Voltage Variable Absorptive Attenuator
0.5—
40 dB, 0.5 — 3.0 GHz
Features
•
•
•
•
•
•
Single Positive Voltage Control 0 to +5 Volts
40 dB Attenuation Range at 900 MHZ GHz
± 2 dB Linearity from BSL
Low DC Power Consumption
Low-Cost SOIC-8 Plastic Package
Tape and Reel Packaging Available
SOIC-8
1
PIN 8
Oreintation
Mark
.1497/.1574
(3.80/4.00)
-B-
.2284/.2440
(5.80/6.20)
M
.010(.25) B M
PIN 1
.1890/.1968
(4.80/5.00)
-A-
Description
M/A-COM’s AT-108 is a GaAs, MESFET MMIC voltage
variable absorptive attenuator in a low cost SOIC-8 lead 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.
.0532/.0688
(1.35/1.75)
.004
(0.10)
BSC.
.050
(1.27)
CHAMFER
(OPTIONAL
.0040/.0098
)
(.10/.25)
0°/80°
-C-
.0075/.0098
(.19/.25)
.013/.020 (8
(.33/.51)
PL)
M
.010(.25) C A M B S
.016/.050
(0.40/1.27)
1. Dimensions are in inches/mm.
Ordering Information
Part Number
AT-108
AT-108TR
AT-108RTR
Package
SOIC-8 Lead Plastic Package
Forward Tape and Reel
1
Reverse Tape and Reel
1
1. If specific reel size is required, consult factory for part number
assignment.
Electrical Specifications: T
A
= 25°C
1
=
Parameter
Insertion Loss
Attenuation
Test Conditions
1
0.5 - 1.0 GHz
1.0 - 3.0 GHz
0.5 - 1.0 GHz
1.0 - 2.0 GHz
2.0 - 3.0 GHz
0.5 - 1.0 GHz
1.0 - 2.0 GHz
2.0 - 3.0 GHz
0.5 - 3.0 GHz
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
Units
dB
dB
dB
dB
dB
dB
dB
dB
µs
µs
mV
Min.
Typ.
2.5
3.2
Max.
2.7
3.5
40
35
28
±0.5
±1.2
±1.5
2:1
15
25
12
±0.8
±1.5
±1.8
Flatness
(Peak-to-Peak)
VSWR
T
rise
,
T
fall
T
on
,
T
off
Transients
1.
All measurements in a 50Ω system.
Specifications subject to change without notice.
V 4.0
North America:
Tel. (800) 366-2266, Fax (800) 618-8883
Asia/Pacific:
Tel.+81-44-844-8296, Fax +81-44-844-8298
Europe:
Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
MA-COM [ M/A-COM TECHNOLOGY SOLUTIONS, INC. ]
