3 Volt Voltage Variable Absorptive Attenuator
40 dB, 0.5-2.0 GHz
AT-113
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.
V5
1
Features
•Single Positive Voltage Control: 0 to +3 Volts
•40 dB Attenuation Range at 0.9 GHz
•± 2 dB Linearity from BSL
•Low DC Power Consumption
•SOIC-8 Plastic Package
•Tape and Reel Packaging Available
Description
M/A-COM’s AT-113 is a GaAs MMIC voltage
variable absorptive attenuator in a low-cost SOIC 8-
lead surface mount plastic package. The AT-113 is
ideally suited for use where linear 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-113 is fabricated with a monolithic GaAs
MMIC using a mature 1-micron process. The
process features full chip passivation for increased
performance and reliability.
Functional Schematic 1,2,3,4
Pin Configuration
1. VCC = +3 VDC @ 50 µA maximum.
2. VC = 0 VDC to +3 VDC @ 50 µA maximum.
3. External DC blocking capacitors are required on all RF
ports.
4. 39 pF used for data measurements.
Pin No. Function Pin No. Function
1 Ground 5 VC
2 Ground 6 Ground
3 RF Port 7 RF Port
4 VCC 8 Ground
Absolute Maximum Ratings 5
Parameter
Absolute Maximum
Input Power +21 dBm
Supply Voltage VCC -1 V < VCC < +8 V
Control Voltage VC -1 V < VC < VCC + 0.5 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
Ordering Information
Part Number Package
AT-113 SOIC 8-Lead Plastic Package
AT-113TR Forward Tape and Reel
Note: Reference Application Note M513 for reel size
information.
5. Exceeding any one or combination of these limits may cause
permanent damage to this device.
7 6 58
1 2 3 4
3 Volt Voltage Variable Absorptive Attenuator
40 dB, 0.5-2.0 GHz
AT-113
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.
V5
2
SOIC-8
Electrical Specifications6: TA = 25°C, Z0 = 50 Ω
Parameter Test Conditions Units Min Typ Max
Insertion Loss 0.5 - 1.0 GHz
1.0 - 2.0 GHz
dB
dB
—
—
2.7
3.0
3.0
3.5
Attenuation 0.5 - 1.0 GHz
1.0 - 2.0 GHz
dB
dB
40
35
—
—
—
—
Flatness
(Peak to Peak)
0.5 - 1.0 GHz
1.0 - 2.0 GHz
dB
dB
—
—
± 0.5
± 1.2
± 0.8
± 1.5
VSWR — Ratio — 2:1 —
Trise, Tfall 10% to 90% RF, 90% to 10% RF µS — 10 —
Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF µS — 12 —
Transients In-band mV — 10 —
6. The RF ports must be blocked outside of the package from ground or any other voltage.
3 Volt Voltage Variable Absorptive Attenuator
40 dB, 0.5-2.0 GHz
AT-113
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.
V5
3
Typical Performance Curves @ 25°C
Attenuation vs. Control Voltage
Insertion Loss vs. Frequency Return Loss vs. Control Voltage
F = 900 MHz
Attenuation vs. Frequency @ 0V
IP3 vs. Control Voltage
1 dB Compression vs. Control Voltage
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
-50
-40
-30
-20
-10
0
0.00.51.01.52.02.53.0
0.9 GHz
1.8 GHz
2.4 GHz
Control Voltage (V)
-50
-40
-30
-20
-10
0
0.51.01.52.02.53.0
Frequency (GHz)
-30
-25
-20
-15
-10
-5
0
0.00.51.01.52.02.53.0
S11
S22
Control Voltage (V)
-5
0
5
10
15
20
25
0.00.51.01.52.02.53.0
400 MHz
900 MHz
Control Voltage (V)
0
5
10
15
20
25
30
35
0.00.51.01.52.02.53.0
400 MHz
900 MHz
Control Voltage (V)
3 Volt Voltage Variable Absorptive Attenuator
40 dB, 0.5-2.0 GHz
AT-113
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.
V5
4
Typical Performance Curves
Attenuation vs. Temperature
Normalized @ 25°C, F = 900 MHz
-3
-2
-1
0
1
2
3
0.00.501.01.52.02.53.0
+85°C
-40°C
Control Voltage (V)
