鈥?/div>
Single Voltage Control 0 to -3 Volts
25 dB Attenuation Range at 0.9 GHz
Low DC Power Consumption
Low Cost SOT-25 Plastic Package
Tape and Reel Packaging Available
SOT-25
Description
M/A-COM鈥檚 AT-255 is a GaAs MMIC voltage variable
absorptive attenuator in a low cost SOT-25 surface mount
plastic package. The AT-255 is ideally suited for use where
variable
attenuation fine tuning and very low power
consumption are required.
Note:
1. Leads Coplanarity should be 0.003 (0.08) max.
Typical applications include radio, cellular, GPS equipment and
automatic gain/level control circuits.
The AT-255 is fabricated using a mature 1-micron GaAs
MESFET process. The process features full chip passivation for
increased performance and reliability.
DIM
A
B
C
D
E
F
G
H
J
INCHES
MIN
MAX
.106
.122
.100
.118
.051
錚?/div>
.063 REF.
.032
.043
.014
.020
.003
錚?/div>
.000
.006
.018 REF.
Ordering Information
Part Number
AT-255
AT-255TR
Package
SOT-25 Plastic
Forward Tape and Reel
1
MILLIMETERS
MIN
MAX
2.70
3.10
2.54
3.00
1.30
錚?/div>
1.60 REF.
.80
1.10
.35
.50
.08
錚?/div>
.00
.15
.45 REF
1. Reference Application Note M513 for reel size information.
Electrical Specifications: T
A
= +25擄C
1
=
Parameter
Insertion Loss
Attenuation
Flatness (Peak-to-Peak)
VSWR
T
rise
,
T
fall
T
on
,
T
off
Transients
1.
Test Conditions
DC - 2.0 GHz
DC - 1.0 GHz
1.0 - 2.0 GHz
DC - 1.0 GHz
1.0 - 2.0 GHz
DC - 2.0 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
nS
nS
mV
Min.
23
18
Typ.
3.6
25
20
鹵7
鹵5
3:1
10
20
10
Max.
4.2
鹵10
鹵8
All measurements at 1 GHz in a 50鈩?system unless otherwise specified. Insertion Loss varies 0.003 dB/擄C.
Specifications subject to change without notice.
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.
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