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AT-250 Schematic ( PDF Datasheet ) - Tyco Electronics

Teilenummer AT-250
Beschreibung Voltage Variable Absorptive Attenuator DC - 2 GHz
Hersteller Tyco Electronics
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Gesamt 2 Seiten
AT-250 Datasheet, Funktion
Voltage Variable Absorptive Attenuator
DC - 2 GHz
Features
q 12 dB Voltage Variable Attenuation
q Low Intermodulation Products
q Low DC Power Consumption: 50 µW
q Single Voltage Control 0 to -4 Volts
q Nanosecond Switching Speed
q Temperature Range: -40˚C to +85˚C
q Low Cost SOIC 8 Plastic Package
q Tape and Reel Packaging Available1
SO-8
AT-250
V 2.00
Description
M/A-COM’s AT-250 is a GaAs MMIC voltage variable absorptive
attenuator in a low cost SOIC 8-lead surface mount plastic pack-
age. The AT-250 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-250 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
Package
AT-250 PIN
SOIC 8-Lead Plastic Package
AT-250TR
Forward Tape & Reel
AT-250RTR
Reverse Tape & Reel
Electrical Specifications, TA = +25°C
Parameter
Insertion Loss
Flatness
(Peak to Peak)
Test Conditions2
DC – 0.1 GHz
DC – 0.5 GHz
DC – 1.0 GHz
DC – 2.0 GHz
DC – 0.1 GHz
DC – 0.5 GHz
DC – 1.0 GHz
DC – 2.0 GHz
VSWR
Trise, Tfall
Ton, Toff
Transients
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, 50% Control to 10% RF
In Band
Power
Handling
Linear Operation
Absolute Max Input Power
Measured Relative
0.05 GHz
IP2 to Input Power
0.5 – 2.0 GHz
(For two-tone Input Power Up to +5 dBm)
Measured Relative
0.05 GHz
IP3 to Input Power
0.5 – 2.0 GHz
(For two-tone Input Power Up to +5 dBm)
Unit
dB
dB
dB
dB
dB
dB
dB
dB
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
1. Refer to “Tape and Reel Packaging”Section, or contact factory.
2.All measurements at 1 GHz in a 50system, unless otherwise specified.A control voltage 0 to -4 volts @ 20 µA typ.
3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply.
Min.
28
40
18
18.5
Typ.
2.9
3.0
3.2
3.4
+/– 0.1
+/– 0.2
+/– 0.5
+/– 1.2
2.1:1
3
5
10
34
47
31(3)
36(3)
Max
3.1
3.2
3.5
3.8
+/– 0.3
+/– 0.4
+/– 0.8
+/– 1.5
13
21





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