MA-COM AT-255 3 volt voltage variable attenuator 25 db, dc - 2.5 ghz Datasheet

AT-255
3 Volt Voltage Variable Attenuator
25 dB, DC - 2.5 GHz
Functional Schematic 3
Features
•
•
•
•
•
Rev. V7
Single Voltage Control: 0 to -3 Volts
25 dB Attenuation Range at 0.9 GHz
Low DC Power Consumption
SOT-25 Plastic Package
Tape and Reel Packaging Available
Vc
GND
5
4
Description
M/A-COM’s AT-255 is a GaAs MMIC voltage
variable absorptive attenuator in a low cost SOT-25
surface mount plastic package. The AT-255 is
ideally suited for use where variable attenuation, fine
tuning, and very low power consumption are
required.
Typical applications include radio, cellular, GPS
equipment and automatic gain/level control circuits.
The AT-255 is fabricated using a mature 1-micron
GaAs MESFET process. The process features full
chip passivation for increased performance and
reliability.
1
2
3
RF
GND
RF
3. VC = -3 V to 0 V @ 25 µA maximum.
Pin Configuration
Ordering Information
1,2
Part Number
Package
AT-255
Bulk Package
AT-255TR
1000 piece reel
AT-255SMB
Sample Board
1. Reference Application Note M513 for reel size information.
2. All sample boards include 5 loose parts.
Pin No.
Function
Pin No.
Function
1
RF Port
4
Ground
2
Ground
5
VC
3
RF Port
Absolute Maximum Ratings 4
Parameter
Absolute Maximum
Input Power
+21 dBm
Control Voltage VC
-8 V to +0.5 V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
4. Exceeding any one or combination of these limits may cause
permanent damage to this device.
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-255
3 Volt Voltage Variable Attenuator
25 dB, DC - 2.5 GHz
Rev. V7
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Parameter
Test Conditions
Units
Min.
Typ.
Max.
DC—2.0 GHz
dB
—
3.6
4.2
Attenuation
DC—1.0 GHz
1.0—2.0 GHz
dB
dB
23
18
25
20
—
—
Flatness
(Peak-to-Peak)
0.5—1.0 GHz
1.0—2.0 GHz
dB
dB
—
+7
+5
+ 10
+8
VSWR
DC—2.0 GHz
Ratio
—
3:1
—
Trise, Tfall
10% to 90% RF, 90% to 10% RF
nS
—
10
—
Ton, Toff
50% Control to 90% RF,50% Control to 10% RF
nS
—
20
—
Transients
In Band
mV
—
10
—
Insertion Loss
5
5. Insertion loss varies 0.003 dB/°C.
SOT-25 †
†
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-255
3 Volt Voltage Variable Attenuator
25 dB, DC - 2.5 GHz
Rev. V7
Typical Performance Curves
Relative Attenuation vs. Control Voltage
Insertion Loss vs. Frequency
35
4
30
3
25
20
+25°C
-40°C
+85°C
2
15
50 MHz
1 GHz
2.5 GHz
10
1
5
0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.0
0.0
0.5
Control Voltage (V)
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Maximum Relative Attenuation vs. Frequency
Return Loss vs. Control Voltage @ 900 MHz
35
0
-5
30
+25°C
-40°C
+85°C
-10
25
-15
20
-20
15
0.0
0.5
1.0
1.5
2.0
2.5
-25
-3.0
3.0
-2.5
Frequency (GHz)
Input IP3 vs. Control Voltage
50M Hz
-2.0
-1.5
-1.0
-0.5
0.0
Control Voltage (V)
Input P1dB vs. Control Voltage
50M Hz
500M Hz
500M Hz
35
30
30
25
25
20
20
15
15
10
10
5
0
-3.0
5
-2.5
-2.0
-1.5
-1.0
C o nt ro l Vo ltage (V)
-0.5
0.0
0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
C o nt ro l V o lt a ge ( V )
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.
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