Digital Attenuator, 31 dB, 5-Bit
DC - 2.0 GHz
Features
•
•
•
•
•
•
1-dB Attenuation Steps to 31 dB
Ultra Low DC Power Consumption
Low Intermodulation Products: IP3 = 50 dBm
SSOP-20 Plastic Package
Tape and Reel Packaging Available
Temperature Stability: ± 0.15 dB from –40°C to
+85°C
AT-260
V5
Functional Schematic
20
19
18
17
16
15
14
13
12
11
16 dB
8 dB
4 dB
2 dB
1 dB
Description
M/A-COM’s AT-260 is a 5-bit, 1-dB step GaAs MMIC
digital attenuator in a low cost SSOP-20 surface
mount plastic package. The AT-260 is ideally suited
for use where high accuracy, fast switching, very low
power consumption and low intermodulation
products are required at a low cost.
Typical applications include radio and cellular
equipment, wireless LANS, GPS equipment and
other gain/level control circuits.
The AT-260 is fabricated with a monolithic GaAs
MMIC using a mature 1-micron process. The
process features full chip passivation for increased
performance and reliability.
1
2
3
4
5
6
7
8
9
10
Pin Configuration
Pin No.
1
2
3
4
Function
VC1
VC1
VC2
VC2
VC3
VC3
VC4
VC4
No Connection
VC5
Pin No.
11
12
13
14
15
16
17
18
19
20
Function
RF1
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
RF2
Ordering Information
Part Number
AT-260
AT-260TR
5
6
Package
SSOP 20-Lead
Forward Tape and Reel
7
8
9
10
Note: Reference Application Note M513 for reel size
information.
Absolute Maximum Ratings
1,2
Parameter
Input Power:
0.05 GHz
0.5 - 2.0 GHz
Control Voltage
Operating Temperature
Storage Temperature
Absolute Maximum
+27 dBm
+34 dBm
+5V, -8.5V
-40°C to +85°C
-65°C to +150°C
1. Exceeding any one or combination of these limits may cause
permanent damage to this device.
2. M/A-COM does not recommend sustained operation near
these survivability limits.
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.
Digital Attenuator, 31 dB, 5-Bit
DC - 2.0 GHz
Electrical Specifications: T
A
= 25°C, Z
0
= 50
Ω
Parameter
Reference Insertion Loss
AT-260
V5
Test Conditions
DC - 0.1 GHz
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
(Any state)
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF,
50% Control to 10% RF
In Band
Input Power
0.05 GHz
0.5 - 2.0 GHz
0.05 GHz
0.5 - 2.0 GHz
Measured Relative to Input Power
(for two-tone input power up to +5 dBm)
0.05 GHz
0.5 - 2.0 GHz
Measured Relative to Input Power
(for two-tone input power up to +5 dBm)
Units
dB
dB
dB
dB
Min.
—
—
—
—
Typ.
1.6
1.7
1.9
2.2
Max.
1.8
1.9
2.2
2.5
Attenuation Accuracy
3
VSWR
Trise, Tfall
Ton, Toff
Transients
1 dB Compression
± (0.20 dB +3% of Atten Setting in dB) dB
± (0.30 dB +3% of Atten Setting in dB) dB
Ratio
nS
nS
mV
dBm
dBm
dBm
dBm
—
—
—
—
—
—
—
—
1.5:1
8
15
2
20
27
45
60
—
—
—
—
—
—
—
—
IP
2
IP
3
dBm
dBm
—
—
34
50
—
—
3. Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
Truth Table
4
Control Inputs
VC5 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1
1
0
1
1
1
1
0
1
1
0
1
1
1
0
0
0
1
0
0
0
1
1
1
1
0
1
1
0
0
0
0
1
0
0
1
1
1
1
1
0
1
0
0
0
0
0
1
0
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
Atten (dB)
Reference
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Handling Procedures
Please observe the following precautions to avoid
damage:
Static Sensitivity
Gallium Arsenide Integrated Circuits are sensitive
to electrostatic discharge (ESD) and can be
damaged by static electricity. Proper ESD control
techniques should be used when handling these
devices.
4. 0 = Vin Low = 0 V = 0 to -0.2 V @ 20
µA
maximum.
1 = Vin High = -5 V @ 20 µA typical to –8 V @ 200
µA
maximum.
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.
Digital Attenuator, 31 dB, 5-Bit
DC - 2.0 GHz
Typical Performance Curves
Insertion Loss
4
AT-260
V5
Attenuation Accuracy
1.0
2 dB
4 dB
8 dB
16 dB
31 dB
3
+25°C
-40°C
+85°C
0.5
2
0.0
1
-0.5
0
0.0
-1.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR
1.6
0
1
2
4
8
16
31
1.5
1.4
1.3
1.2
1.1
1.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
SSOP-20
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.
•
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.
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