AT-118 [TE]
Voltage Variable Absorptive Attenuator; 可变电压衰减器吸收
| 型号： | AT-118 |
| 厂家： | 
TE CONNECTIVITY |
| 描述： | Voltage Variable Absorptive Attenuator |
| 文件： | 总3页 (文件大小：53K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AT-118
Voltage Variable
Absorptive Attenuator
Features
MSOP-81
•
•
•
•
•
Single Positive Control 0 to 3 Volts
15 dB Voltage Variable Attenuation
± 2 dB Linearity from BSL
Positive Control Logic
Low Cost MSOP-8 Plastic Package
R
.0 1 0
ID P IN
0 .0 0 7
4 X
1 2 °
0 .1 1 8
0 .1 9 3
0 .0 2 1
.0 2 0
0 .0 2 5 6
.0 2 0
0 .1 1 8
Description
4 X 1 2 °
M/A-COM’s AT-118 is a linear GaAs MMIC voltage variable
absorptive attenuator in a low cost MSOP-8 surface mount
plastic package. The AT-118 is ideally suited for applications
where linear attenuation and fine tuning are required.
3 °
0 .0 4 0
0 .0 3 4
0 .0 0 8
0 .0 1 3
Typical applications include radio, cellular, GPS equipment and
automatic gain/level control circuits.
1. Dimensions are in inches.
The AT-118 is fabricated with a mature 1 micron gate length
GaAs MESFET process. The process features full chip
passivation for increased performance and reliability.
Ordering Information
Part Number
Package
AT-118 PIN
AT-118TR
MSOP 8-Lead Plastic
Forward Tape and Reel1
1. Reference Application Note M513 for reel size information.
Electrical Specifications: TA = +25°C1
=
Parameter
Test Conditions
Units
dB
dB
Min.
Typ.
1.6
14
Max.
1.9
Insertion Loss
Attenuation
0.5 - 3.0 GHz
0.5 - 1.0 GHz
1.0 - 3.0 GHz
0.5 - 3.0 GHz
0.5 - 3.0 GHz
12
15
dB
16
Insertion Loss Flatness (Peak-to-Peak)
dB
±0.3
2:1
10
12
10
±0.5
VSWR
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
Trise, Tfall
Ton, Toff
Transients
µS
µS
mV
1. All measurements taken at 900 GHz in a 50Ω system unless otherwise specified. Loss varies at 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.
Voltage Variable Absorptive Attenuator
Absolute Maximum Ratings1
AT-118
Functional Schematic1, 2, 3
Parameter
Maximum Input Power
Supply Voltage VCC
Absolute Maximum
+21 dBm
GND
1
2
3
4
GND
-1V, +8V
8
7
6
5
Control Voltage VC
-1V, VCC +0.5V
-40°C to +85°C
-65°C to +150°C
RF
RF
Vcc
Vc
Operating Temperature
Storage Temperature
GND
GND
1. Exceeding any one or a combination of these limits may cause
permanent damage.
1. VCC = +3 VDC @ 20 µA max.
2. VC = 0 VDC to +3 VDC @ 75 µA max.
3. External DC blocking capacitors are required on all RF ports.
4. 39 pF used for data measurements.
Typical Performance Curves
Insertion Loss vs. Frequency
Attenuation vs. Control Voltage
0
0
-0.2
-0.4
-0.6
-0.8
-1
-2
-4
-6
900 MHz
-8
-10
-1.2
-1.4
-1.6
-1.8
-2
-12
2.4 GHz
-14
1.8 GHz
-16
-18
3
2.5
2
1.5
1
0.5
0
0.5
1
1.5
2
2.5
3
FREQUENCY (GHz)
CONTROL VOLTAGE (Volts)
Attenuation vs. Frequency @ Vc = 0V
Typical Device Variation
0
-2
0
-2
F = 900 MHz
-4
-4
-6
-6
-8
-8
-10
-12
-14
-16
-18
-10
-12
-14
-16
-18
0.5
1
1.5
2
2.5
3
3
2.5
2
1.5
1
0.5
0
FREQUENCY (GHz)
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.
Voltage Variable Absorptive Attenuator
Typical Performance Curves (Cont’d)
AT-118
Attenuation vs. Temperature Normalized to
+25°C
1
IP3 vs. Control Voltage
35
30
25
20
15
10
5
0.8
0.6
500 MHz
+ 85C
0.4
0.2
0
900 MHz
-0.2
-0.4
- 40C
-0.6
-0.8
-1
0
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
CONTROL VOLTAGE (Volts)
CONTROL VOLTAGE (Volts)
1 dB Compression vs. Control Voltage
Return Loss vs. Control Voltage
16
14
12
10
8
0
-5
F = 900 MHz
900 MHz
-10
-15
-20
-25
INPUT
6
500 MHz
OUTPUT
4
2
0
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
CONTROL VOLTAGE (Volts)
CONTROL VOLTAGE (Volts)
Specifications subject to change without notice.
V 4.0
3
ꢀ 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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