MA-COM AT

Voltage Variable Absorptive Attenuator
12 dB, DC-2.0 GHz
Features
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AT-259
V4
Functional Schematic
Attenuation: 12 dB at 1 GHz
Low Intermodulation Products
Low DC Power Consumption: 50 µW
Single Voltage Control: 0 to -4 Volts
Nanosecond Switching Speed
Temperature Range: -40°C to +85°C
SOT-143 Plastic Package
Tape and Reel Packaging Available
4
3
1
2
Description
M/A-COM’s AT-259 is a GaAs MMIC voltage
variable absorptive attenuator in a low cost SOT-143
4-Lead surface mount plastic package. The AT-259
is ideally suited for use where attenuation fine
tuning, fast switching and very low power
consumption are required.
Typical applications include radio, cellular, GPS
equipment and other automatic gain/level control
circuits.
The AT-259 is fabricated with a monolithic GaAs
MMIC using a mature 1 micron process. The
process features full chip passivation for increased
performance and reliability.
Pin Configuration
Pin No.
Function
Pin No.
Function
1
Ground
3
RF2
2
VC
4
RF1
Ordering Information
Absolute Maximum Ratings 1
Part Number
Package
AT-259
SOT 4-Lead Plastic Package
Parameter
Absolute Maximum
AT-259TR
Forward Tape and Reel
Input Power
+21 dBm
Control Voltage
+5V, -8.5V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
Note: Reference Application Note M513 for reel size
information.
1. Exceeding any one or combination of these limits may cause
permanent damage to this device.
1
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
• 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.macom.com for additional data sheets and product information.
Voltage Variable Absorptive Attenuator
12 dB, DC-2.0 GHz
AT-259
V4
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Parameter
Test Conditions2
Frequency
Units
Min
Typ
Max
Insertion Loss
—
DC - 0.1 GHz
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
dB
dB
—
—
—
—
2.9
3.0
3.2
3.4
3.1
3.2
3.5
3.8
Flatness
(Peak to Peak)
5 dB Attenuation
10 dB Attenuation
15 dB Attenuation
DC - 2.0 GHz
DC - 2.0 GHz
DC - 2.0 GHz
dB
dB
dB
—
—
—
+ 0.2
+ 2.3
+ 7.0
+ 0.4
+ 2.5
+ 7.5
Output Impedance
—
—
Ohms
—
50
—
VSWR
—
—
Ratio
—
2.1:1
—
Trise, Tfall
10% to 90% RF, 90% to 10% RF
—
nS
—
3
—
Ton, Toff
50% Control to 90% RF,
50% Control to 10% RF
—
nS
—
5
—
Transients
In Band
—
mV
—
10
—
Power Handling
Linear Operation
Absolute maximum Input Power
—
dBm
dBm
—
—
—
—
13
21
IP2
Measured Relative to Input Power
(For two-tone Input Power Up to +5 dBm)
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
34
47
—
—
IP3
Measured Relative to Input Power
(For two-tone Input Power Up to +5 dBm)
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
18
18.5
313
363
—
—
2. Control voltage: 0 to -4 volts @ 20 µA typical.
3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply.
SOT-143
2
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
• 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.macom.com for additional data sheets and product information.
Voltage Variable Absorptive Attenuator
12 dB, DC-2.0 GHz
AT-259
V4
Typical Performance Curves
Insertion Loss vs. Frequency
Attenuation vs. Frequency
4
20
3
15
10
+25°C
-40°C
+85°C
2
5
10
15
5
1
0
0.0
0.5
1.0
1.5
2.0
0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR vs. Frequency
Attenuation vs. Control Voltage, F = 950 MHz
15
2.0
1.8
10
1.6
0
12
5
1.4
5
1.2
1.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
3
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
Control Voltage (V)
• 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.macom.com for additional data sheets and product information.