MACOM AT-259TR, AT-259RTR, AT-259 Datasheet
Vo l t age Va r i a ble Absorptive Attenuator
DC - 2 GHz AT- 2 5 9
V 2.00
Features
● Attenuation: 12 dB at 1 GHz
● Low Intermodulation Products
● Low DC Power Consumption: 50 µW
● Single Voltage Control 0 to -4 Volts
● Nanosecond Switching Speed
● Temperature Range: -40˚C to + 85˚C
● Low Cost SOT/143 Plastic Package
● Tape and Reel Packaging Available
1
Description
M/A-COM’s AT-259 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOT/143 4-Lead surface mount
plastic package. The AT-259 is ideally suited for use where
attenuation fine tuning, fast switching and very low power
consumption are re q u i red. Typical applications include radio,
c e l l u l a r, GPS equipment and other Automatic Gain/Level
C o n t rol circuits.
SOT-143
The AT-259 is fabricated with a monolithic GaAs MMIC using
a mature 1 micron process. The process features full chip passivation for increased perf o r mance and reliability.
Ordering Information
Part Number Package
AT-259 PIN SOT 4-Lead Plastic Package
AT-259TR Forward Tape & Reel
AT-259RTR Reverse Tape & Reel
Electrical Specifications,TA= +25°C
Parameter Test Conditions
Insertion Loss DC – 0.1 GHz dB 2.9 3.1
Flatness DC – 2.0 GHz 5 dB Attenuation dB ± 0.2 ± 0.4
(Peak to Peak) 10 dB Attenuation dB ± 2.3 ± 2.5
VSWR 2.1:1
Trise, Tfall 10% to 90% RF, 90% to 10% RF nS 3
Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS 5
Transients In Band mV 10
Power Linear Operation dBm 13
Handling Absolute Max.Input Power dBm 21
IP
2
IP
3
Measured Relative 0.05 GHz 34
to Input Power 0.5 – 2.0 GHz dBm 47
(For two-tone Input Power Up to +5 dBm)
Measured Relative 0.05 GHz dBm 18 31
to Input Power 0.5 – 2.0 GHz dBm 18.5 36
(For two-tone Input Power Up to +5 dBm)
2
DC – 0.5 GHz dB 3.0 3.2
DC – 1.0 GHz dB 3.2 3.5
DC – 2.0 GHz dB 3.4 3.8
15 dB Attenuation dB ± 7.0 ± 7.5
Unit Min. Typ. Max
(3)
(3)
1. Refer to “Tape and Reel Packaging”Section, or contact factory.
2. All measurements at 1 GHz in a 50 Ω system, 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.
Voltage Variable Absorptive Attenuator AT-259
1
Functional Sch e m a t i cAbsolute Maximum Ratings
V 2.00
Parameter Absolute Maximum
Max. Input Power +21 dBm
Control Voltage +5 V, -8.5 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
1.Operation of this device above any one of these parameters may cause permanent damage
Pin Configuration
Pin No. Description
1 GND
2 A
3 RF2
4 RF1
Typical Pe r fo r m a n c e
4
1 2
3
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