AT-255TR [TE]
3Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz; 3Volt可变电压衰减器25分贝， DC - 2.5 GHz的
| 型号： | AT-255TR |
| 厂家： | 
TE CONNECTIVITY |
| 描述： | 3Volt Voltage Variable Attenuator 25 dB, DC - 2.5 GHz |
| 文件： | 总2页 (文件大小：36K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AT-255
3Volt Voltage Variable Attenuator
25 dB, DC - 2.5 GHz
Features
SOT-25
•
•
•
•
•
Single Voltage Control 0 to -3 Volts
25 dB Attenuation Range at 0.9 GHz
Low DC Power Consumption
Low Cost SOT-25 Plastic Package
Tape and Reel Packaging Available
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.
Note:
1. Leads Coplanarity should be 0.003 (0.08) max.
INCHES MILLIMETERS
Typical applications include radio, cellular, GPS equipment and
automatic gain/level control circuits.
DIM
MIN
.106
.100
MAX
.122
.118
.051
MIN
2.70
2.54
MAX
The AT-255 is fabricated using a mature 1-micron GaAs
MESFET process. The process features full chip passivation for
increased performance and reliability.
A
B
C
D
E
F
G
H
J
3.10
3.00
1.30
.063 REF.
.032
.014
.003
.000
1.60 REF.
.043
.020
.80
.35
.08
.00
1.10
.50
Ordering Information
.006
.15
Part Number
AT-255
AT-255TR
Package
SOT-25 Plastic
Forward Tape and Reel1
.018 REF.
.45 REF
1. Reference Application Note M513 for reel size information.
Electrical Specifications: TA = +25°C1
=
Parameter
Test Conditions
Units
dB
dB
Min.
Typ.
Max.
4.2
Insertion Loss
Attenuation
DC - 2.0 GHz
3.6
25
20
±7
±5
3:1
10
20
10
DC - 1.0 GHz
1.0 - 2.0 GHz
DC - 1.0 GHz
1.0 - 2.0 GHz
DC - 2.0 GHz
23
18
dB
Flatness (Peak-to-Peak)
dB
dB
±10
±8
VSWR
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
nS
nS
mV
Trise, Tfall
Ton, Toff
Transients
1. All measurements at 1 GHz in a 50Ω system unless otherwise specified. Insertion Loss varies 0.003 dB/°C.
Specifications subject to change without notice.
V 4.0
1
ꢀ North America: Tel. (800) 366-2266, Fax (800) 618-8883
ꢀ Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
ꢀ Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
3 Volt Voltage Variable Attenuator, 25 dB, DC - 2.5 GHz
AT-255
Absolute Maximum Ratings1
Functional Schematic1
Parameter
Maximum Input Power
Control Voltage VC
Absolute Maximum
Vc
5
GND
4
+21 dBm
-8V, +0.5V
Operating Temperature
Storage Temperature
-40°C to +85°C
-65°C to +150°C
1
2
3
RF
1. Exceeding any one or a combination of these limits may cause
permanent damage.
RF GND
1. VCC = 0 VDC to -3 VDC @ 50 µA max.
Typical Performance Curves
Relative Attenuation vs. Control Voltage
Insertion Loss vs. Frequency
0
0
-5
-1
-2
-3
-4
-10
-15
2.5GHz
-20
-25
-30
50MHz
-35
-3
-2
-1
0
0
1
2
3
4
CONTROL VOLTAGE (VOLTS)
FREQUENCY(GHz)
Return Loss vs. Control @ 900 MHz
Maximum Relative Attenuation vs. Frequency
0
-5
0
-5
-10
-15
-20
-25
-30
-35
-10
-15
-20
-25
0
0.5
1
1.5
2
2.5
3
-3
-2
-1
0
CONTROL VOLTAGE (VOLTS)
FREQUENCY (GHz)
Input P1dB vs. Control Voltage
Input IP3 vs. Control Voltage
30
25
20
15
10
5
45
40
35
30
25
20
15
10
5
500 MHz
50MHz
500MHz
50MHz
0
0
-3
-2
-1
0
-3
-2
-1
0
CONTROL VOLTAGE (VOLTS)
CONTROL VOLTAGE (VOLTS)
Specifications subject to change without notice.
V 4.0
2
ꢀ North America: Tel. (800) 366-2266, Fax (800) 618-8883
ꢀ Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
ꢀ Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
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