Voltage Variable Absorptive Attenuator, 35 dB
DC - 2 GHz
AT-635
V 3.00
Features
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SO-14
35 dB Voltage Variable Attenuation @ 1 GHz
Single Voltage Control 0 to -4 Volts
Low DC Power Consumption: 10 mW
Nanosecond Switching Speed
Temperature Range: -40藲C to +85藲C
Low Cost SOIC14 Plastic Package
Tape and Reel Packaging Available
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Description
M/A-COM鈥檚 AT-635 is a GaAs MMIC voltage variable absorptive
attenuator in a low cost SOIC 14-lead surface mount plastic pack-
age. The AT-635 is ideally suited for use where attenuation fine
tuning, fast switching and very low power consumption are
required. Typical applications include radio, cellular, GPS equip-
ment and other Automatic Gain/Level Control circuits.
The AT-635 is fabricated with a monolithic GaAs MMIC using a
mature 1-micron process. The process features full chip passiva-
tion for increased performance and reliability.
Ordering Information
Part Number
AT-635 PIN
AT-635TR
Package
SOIC 14-Lead Plastic Package
Forward 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
10 dB Attenuation
20 dB Attenuation
30 dB Attenuation
Unit
dB
dB
dB
dB
dB
dB
dB
Min.
Typ.
6.5
6.7
7.2
7.5
+/-1.0
+/-1.2
+/-1.2
2.0:1
2
4
30
13
21
34
47
18
18.5
31
(3)
36
(3)
Max
6.7
7.0
7.4
7.8
+/-1.3
+/-1.5
+/-1.5
Flatness
(Peak to Peak)
DC-2 GHz
VSWR
Trise, Tfall
Ton, Toff
Transients
Power
Handling
IP2
IP3
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, 50% Control to 10% RF
In Band
Linear Operation
Absolute Max Input Power
Measured Relative
to Input Power
(for two-tone input power up to +5 dBm)
Measured Relative
to Input Power
(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
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
dBm
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 control voltage 0 to -4 volts @ 20 碌A(chǔ) typ.
3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply.
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