AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Features
•
•
•
•
Positive Single Control
2-dB Attenuation Steps to 30 dB
Low DC Power Consumption
TSSOP-16 Plastic Package
Rev. V7
Functional Schematic
2,3
Vs
16
15
14
13
12
1
11
10
9
Description
M/A-COM’s AT-264 is a 4-bit, 2-dB step GaAs MMIC
digital attenuator in a low cost TSSOP-16 surface
mount plastic package. The AT-264 is ideally suited
for use where high accuracy, very low power
consumption and low intermodulation products are
required. Typical applications include radio, cellular,
wireless LANs, GPS equipment and other gain/level
control circuits.
The AT-264 is fabricated using a mature 1 micron
GaAs MESFET process. The process features full
chip passivation for increased performance and
reliability.
1
16
8
4
2
2
3
4
5
6
7
8
2. Blocking caps are required on all RF ports (39 pF used for
data measurements).
3. Vs = +5 ± 0.2 VDC must be applied at RF1 or RF2 using a
10 KΩ or greater pull-up resistor.
Pin Configuration
Ordering Information
1
Part Number
AT-264-PIN
AT-264TR
Package
Bulk Packaging
1000 piece reel
Pin No.
1
2
3
4
5
6
7
8
Function
Ground
Ground
VC1
VC2
VC3
VC4
Ground
Ground
Pin No.
9
10
11
12
13
14
15
16
Function
RF2
Ground
Ground
Ground
Ground
Ground
Ground
RF1
1. Reference Application Note M513 for reel size information.
1
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Electrical Specifications
4
: T
A
= 25°C, Z
0
= 50
Ω,
V
S
= 5 V
Parameter
Reference Insertion Loss
Attenuation Accuracy
VSWR
Trise, Tfall
Ton, Toff
Transients
1 dB Compression
Test Conditions
0.5 - 1.0 GHz
0.5 - 2.0 GHz
0.5 - 1.0 GHz
0.5 - 2.0 GHz
1.0 - 1.5 GHz
0.5 - 2.0 GHz
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF,50% Control to 10% RF
In Band
Input Power, 0.5 GHz
Input Power, 0.9 GHz
0.5 GHz
0.5 - 2.0 GHz
Measured Relative to Input
(for two-tone Input Power up to +5 dBm)
0.5 GHz
0.5 - 2.0 GHz
Measured Relative to Input
(for two-tone Input Power up to +5 dBm)
⏐Vc⏐ =
5 V
—
Units
dB
dB
Min.
—
—
Typ.
2.0
2.2
Max.
2.4
2.6
Rev. V7
± (0.15 dB + 5% of attenuation setting in dB) dB
± (0.3 dB + 5% of attenuation setting in dB) dB
Ratio
Ratio
ns
ns
mV
dBm
dBm
dBm
dBm
—
—
—
—
—
—
—
—
—
1.5:1
1.9:1
200
200
75
25
25
65
71
—
—
—
—
—
—
—
—
—
IP
2
IP
3
dBm
dBm
µA
µA
—
—
—
—
43
47
—
—
—
—
10
20
I
C
I
VS
4. External DC blocking capacitors are required on all RF ports. Loss varies at 0.003 dB/°C.
Absolute Maximum Ratings
5,6
Parameter
Input Power
50 MHz
500 - 2000 MHz
Control Voltage
Operating Temperature
Storage Temperature
Absolute Maximum
+27 dBm
+34 dBm
-0.5 V < V
C
< 8.5 V
-40°C to +85°C
-65°C to +150°C
Truth Table
7
VC1 VC2 VC3 VC4
1
1
1
1
0
0
1
1
1
0
1
0
1
1
0
1
1
0
1
0
1
1
1
0
Attenuation (dB)
Reference Insertion Loss
2
4
8
16
30
5. Exceeding any one or combination of these limits may cause
permanent damage to this device.
6. M/A-COM does not recommend sustained operation near
these survivability limits.
7. 0 = 0 ± 0.2 V, 1 = +5 V
2
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Typical Performance Curves
Insertion Loss
3.5
-40°C
+25°C
+85°C
Rev. V7
VSWR
2.0
IL
2 dB
4 dB
8 dB
16 dB
30 dB
1.8
3.0
1.6
2.5
1.4
2.0
1.2
1.5
0.5
1.0
1.5
2.0
2.5
3.0
1.0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Frequency (GHz)
Attenuation
35
30
25
20
15
10
5
0
0.5
2 dB
4 dB
8 dB
16 dB
30 dB
Attenuation Accuracy
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
1.0
1.5
2.0
2.5
3.0
0.5
1.0
1.5
2.0
2.5
3.0
2 dB
4 dB
8 dB
16 dB
30 dB
Frequency (GHz)
Frequency (GHz)
3
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
TSSOP-16
Rev. V7
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
ADVANCED:
Data Sheets contain information regarding a product M/A-COM Technology Solutions
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
is considering for development. Performance is based on target specifications, simulated results,
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
and/or prototype measurements. Commitment to develop is not guaranteed.
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
PRELIMINARY:
Data Sheets contain information regarding a product M/A-COM Technology
Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
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