MA-COM AT

AT-259
Voltage Variable Absorptive Attenuator
12 dB, DC - 2.0 GHz
Functional Schematic
Features
•
•
•
•
•
•
•
•
Rev. V5
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
SOT-143 Plastic Package
Tape and Reel Packaging Available
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 required.
Typical applications include radio, cellular, GPS
equipment and other automatic gain/level control
circuits.
The AT-259 is fabricated with a monolithic GaAs
MMIC using a mature 1 micron process. The
process features full chip passivation for increased
performance and reliability.
Ordering Information
Pin No.
Function
Pin No.
Function
1
Ground
3
RF2
2
VC
4
RF1
Absolute Maximum Ratings 3
1,2
Part Number
Package
AT-259
Bulk Packaging
AT-259TR
Forward Tape and Reel
AT-259SMB
Sample Board
1. Reference Application Note M513 for reel size information.
2. All sample boards include 5 loose parts.
†
Pin Configuration
Parameter
Absolute Maximum
Input Power
+21 dBm
Control Voltage
+5V, -8.5V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
3. Exceeding any one or combination of these limits may
cause permanent damage to this device.
Reference Application Note M538 for lead-free solder reflow recommendations.
Meets JEDEC moisture sensitivity level 1 requirements.
1
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
• North America Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-259
Voltage Variable Absorptive Attenuator
12 dB, DC - 2.0 GHz
Rev. V5
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Test Conditions4
Frequency
Units
Min.
Typ.
Max.
Insertion Loss
—
DC - 0.1 GHz
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
dB
dB
—
—
—
—
2.9
3.0
3.2
3.4
3.1
3.2
3.5
3.8
Flatness
(Peak to Peak)
5 dB Attenuation
10 dB Attenuation
15 dB Attenuation
DC - 2.0 GHz
DC - 2.0 GHz
DC - 2.0 GHz
dB
dB
dB
—
—
—
+ 0.2
+ 2.3
+ 7.0
+ 0.4
+ 2.5
+ 7.5
Output Impedance
—
—
Ohms
—
50
—
VSWR
—
—
Ratio
—
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 Handling
Linear Operation
Absolute maximum Input Power
—
dBm
dBm
—
—
—
—
13
21
IP2
Measured Relative to Input Power
(For two-tone Input Power Up to +5 dBm)
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
34
47
—
—
IP3
Measured Relative to Input Power
(For two-tone Input Power Up to +5 dBm)
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
18
18.5
315
365
—
—
Parameter
4. Control voltage: 0 to -4 volts @ 20 µA typical.
5. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply.
SOT-143†
†
Meets JEDEC moisture sensitivity level 1 requirements.
2
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
• North America Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-259
Voltage Variable Absorptive Attenuator
12 dB, DC - 2.0 GHz
Rev. V5
Typical Performance Curves
Insertion Loss vs. Frequency
Attenuation vs. Frequency
4
20
3
15
+25°C
-40°C
+85°C
2
5
10
15
10
5
1
0
0.0
0.5
1.0
1.5
2.0
0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR vs. Frequency
Attenuation vs. Control Voltage, F = 950 MHz
2.0
15
1.8
10
1.6
0
12
5
1.4
5
1.2
1.0
0.0
0.5
1.0
Frequency (GHz)
1.5
2.0
0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
Control Voltage (V)
Handling Procedures
Please observe the following precautions to avoid
damage:
Static Sensitivity
Gallium Arsenide Integrated Circuits are sensitive
to electrostatic discharge (ESD) and can be
damaged by static electricity. Proper ESD control
techniques should be used when handling these
devices.
3
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
• North America Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.