Voltage Variable Absorptive Attenuator, 20 dB
AT-309
DC - 2 GHz
V 2.00
Features
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SO-8
20 dB Voltage Variable Attenuation
Very Low Power Consumption: 50 碌W
Low Intermodulation Products
Dual Voltage Control 0 to -4 Volts
Nanosecond Switching Speed
Temperature Range: -40藲C to +85藲C
Low Cost SOIC8 Plastic Package
Tape and Reel Packaging Available
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Description
M/A-COM鈥檚 AT-309 is a GaAs MMIC voltage variable absorptive
attenuator in a low cost SOIC 8-lead surface mount plastic
package. The AT-309 is ideally suited for use where attenuation
fine tuning, fast switching and very low power consumption
are required. Typical applications include radio, cellular, and
GPS equipment and other Automatic Gain/Level Control cir-
cuits.
The AT-309 is fabricated with a monolithic GaAs MMIC using
a mature 1-micron process. The process features full chip pas-
sivation for increased performance and reliability.
Ordering Information
Part Number
AT-309 PIN
AT-309TR
AT-309RTR
Package
SOIC 8-Lead Plastic Package
Forward Tape & Reel
Reverse Tape & Reel
Electrical Specifications, T
A
= +25擄C
Parameter
Insertion Loss
Test Conditions
2
DC 鈥?0.1 GHz
DC 鈥?0.5 GHz
DC 鈥?1.0 GHz
DC 鈥?2.0 GHz
DC 鈥?0.1 GHz
DC 鈥?0.5 GHz
DC 鈥?1.0 GHz
DC 鈥?2.0 GHz
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, 50% Control to 10% RF
In Band
Input Power (Over Attenuation Range)
Measured Relative (Over Attenuation Range)
to Input Power
(Over Attenuation Range)
(for two-tone input power up to +5 dbm)
Measured Relative (Over Attenuation Range)
to Input Power (Over Attenuation Range)
(for two-tone input power up to +5 dbm)
0.05 GHz
0.5 鈥?2.0 GHz
0.05 GHz
0.5 鈥?2.0 GHz
Unit
dB
dB
dB
dB
dB
dB
dB
dB
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
Min.
Typ.
0.7
0.8
0.9
1.2
+/-0.5
+/-0.5
+/-0.8
+/-1.0
1.4:1
6
8
10
5
47
40
39
32
Max
0.9
1.0
1.2
1.4
+/-0.8
+/-0.8
+/-1.0
+/-1.2
Flatness
(Peak to Peak)
VSWR (Matched)
Trise, Tfall
Ton, Toff
Transients
One dB
Compression
IP2
IP3
1.Refer to 鈥淭ape and Reel Packaging鈥漇ection, or contact factory.
2.All measurements at 1 GHz in a 50鈩?system, unless otherwise specified.The A and B control voltages vary 0 to -4V @ 20 碌A(chǔ) typ.
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