파트넘버.co.kr AT-255 데이터시트 PDF


AT-255 반도체 회로 부품 판매점

3Volt Voltage Variable Attenuator 25 dB/ DC - 2.5 GHz



Tyco Electronics 로고
Tyco Electronics
AT-255 데이터시트, 핀배열, 회로
3Volt Voltage Variable Attenuator
25 dB, DC - 2.5 GHz
AT-255
Features
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.
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.
Ordering Information
Part Number
Package
AT-255
AT-255TR
SOT-25 Plastic
Forward Tape and Reel1
1. Reference Application Note M513 for reel size information.
SOT-25
Note: 1. Leads Coplanarity should be 0.003 (0.08) max.
INCHES
DIM MIN
MAX
A .106
.122
B .100
.118
C
.051
D .063 REF.
E .032
.043
F .014
.020
G .003
H .000
.006
J .018 REF.
MILLIMETERS
MIN MAX
2.70
3.10
2.54
3.00
1.30
1.60 REF.
.80 1.10
.35 .50
.08
.00 .15
.45 REF
Electrical Specifications: TA = +25°C1=
Parameter
Test Conditions
Insertion Loss
DC - 2.0 GHz
Attenuation
DC - 1.0 GHz
1.0 - 2.0 GHz
Flatness (Peak-to-Peak)
DC - 1.0 GHz
1.0 - 2.0 GHz
VSWR
DC - 2.0 GHz
Trise, Tfall
Ton, Toff
Transients
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
Units
dB
dB
dB
dB
dB
nS
nS
mV
1. All measurements at 1 GHz in a 50system unless otherwise specified. Insertion Loss varies 0.003 dB/°C.
Min.
23
18
Typ.
3.6
25
20
±7
±5
3:1
10
20
10
Max.
4.2
±10
±8
Specifications subject to change without notice.
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.
V 4.0
1


AT-255 데이터시트, 핀배열, 회로
3 Volt Voltage Variable Attenuator, 25 dB, DC - 2.5 GHz
Absolute Maximum Ratings1
Parameter
Absolute Maximum
Maximum Input Power
+21 dBm
Control Voltage VC
-8V, +0.5V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
1. Exceeding any one or a combination of these limits may cause
permanent damage.
Typical Performance Curves
Functional Schematic1
Vc GND
54
1 23
RF GND RF
1. VCC = 0 VDC to -3 VDC @ 50 µA max.
AT-255
Relative Attenuation vs. Control Voltage
0
-5
-10
-15 2.5GHz
-20
1.0GHz
-25
-30
-35
-3
-2 -1
CONTROL VOLTAGE (VOLTS)
50MHz
0
Insertion Loss vs. Frequency
0
-1
-2
-3
-4
0123
FREQUENCY(GHz)
4
Maximum Relative Attenuation vs. FQrequency
0
-5
-10
-15
-20
-25
-30
-35
0
0.5 1
1.5 2
2.5 3
FREQUENCY (GHz)
0 Return Loss vs. Control @ 900 MHz
-5
-10
-15
-20
-25
-3
-2 -1
CONTROL VOLTAGE (VOLTS)
0
IInNpPuUtTIPIP33vvss.CCOoNnTtrRoOl LVoVlOtaLgTeAGE
45
40
35 500 MHz
30
25 50MHz
20
15
10
5
0
-3 -2 -1
CONTROL VOLTAGE (VOLTS)
Specifications subject to change without notice.
0
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.
Input P1dB vs. Control Voltage
30
25
50MHz
20
15 500MHz
10
5
0
-3 -2 -1
CONTROL VOLTAGE (VOLTS)
0
V 4.0
2




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