AT-255SMB [TE]
3 Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz; 3伏可变电压衰减器25分贝， DC - 2.5 GHz的
| 型号： | AT-255SMB |
| 厂家： | 
TE CONNECTIVITY |
| 描述： | 3 Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz |
| 文件： | 总3页 (文件大小：68K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AT-255
3 Volt Voltage Variable Attenuator
25 dB, DC - 2.5 GHz
Rev. V7
Functional Schematic 3
Features
•
•
•
•
•
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
4
5
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.
3
1
2
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.
RF
GND
RF
3. VC = -3 V to 0 V @ 25 µA maximum.
Pin Configuration
Pin No.
Function
RF Port
Ground
Pin No.
Function
Ordering Information 1,2
1
2
3
4
5
Ground
VC
Part Number
AT-255
Package
RF Port
Bulk Package
1000 piece reel
Sample Board
AT-255TR
AT-255SMB
Absolute Maximum Ratings 4
1. Reference Application Note M513 for reel size information.
2. All sample boards include 5 loose parts.
Parameter
Input Power
Absolute Maximum
+21 dBm
Control Voltage VC
Operating Temperature
Storage Temperature
-8 V to +0.5 V
-40°C to +85°C
-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
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
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.
Commitment to produce in volume is not guaranteed.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
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.
Insertion Loss5
DC—2.0 GHz
dB
—
3.6
4.2
DC—1.0 GHz
1.0—2.0 GHz
dB
dB
23
18
25
20
—
—
Attenuation
Flatness
(Peak-to-Peak)
0.5—1.0 GHz
1.0—2.0 GHz
dB
dB
+ 7
+ 5
+ 10
+ 8
—
VSWR
Trise, Tfall
Ton, Toff
DC—2.0 GHz
Ratio
nS
—
—
—
3:1
10
20
—
—
—
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF,50% Control to 10% RF
nS
Transients
In Band
mV
—
10
—
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
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
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.
Commitment to produce in volume is not guaranteed.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
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
25
20
15
3
2
1
0
+25°C
-40°C
+85°C
50 MHz
1 GHz
2.5 GHz
10
5
0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Control Voltage (V)
Frequency (GHz)
Maximum Relative Attenuation vs. Frequency
Return Loss vs. Control Voltage @ 900 MHz
35
0
-5
-10
-15
-20
-25
30
+25°C
-40°C
+85°C
25
20
15
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
Frequency (GHz)
Control Voltage (V)
Input IP3 vs. Control Voltage
Input P1dB vs. Control Voltage
50M Hz
500M Hz
50M Hz
500M Hz
35
30
30
25
20
15
10
5
25
20
15
10
5
0
0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
Contro l Voltage (V)
C ontro l Voltage (V)
3
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
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.
Commitment to produce in volume is not guaranteed.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
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