AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Functional Schematic 2,3
Features
Rev. V7
Positive Single Control
2-dB Attenuation Steps to 30 dB
Low DC Power Consumption
TSSOP-16 Plastic Package
Vs
16
15
14
13
12
1
11
10
9
Description
MACOM’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.
16
1
8
2
3
4
4
5
2
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 Information1
Pin No.
Function
Pin No.
Function
Part Number
Package
1
Ground
9
RF2
AT-264-PIN
Bulk Packaging
2
Ground
10
Ground
AT-264TR
1000 piece reel
3
VC1
11
Ground
4
VC2
12
Ground
5
VC3
13
Ground
6
VC4
14
Ground
7
Ground
15
Ground
8
Ground
16
RF1
1. Reference Application Note M513 for reel size information.
1
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Rev. V7
Electrical Specifications4: TA = 25°C, Z0 = 50 Ω, VS = 5 V
Parameter
Test Conditions
Units
Min.
Typ.
Max.
Reference Insertion Loss
0.5 - 1.0 GHz
0.5 - 2.0 GHz
dB
dB
—
—
2.0
2.2
2.4
2.6
Attenuation Accuracy
0.5 - 1.0 GHz
0.5 - 2.0 GHz
VSWR
1.0 - 1.5 GHz
0.5 - 2.0 GHz
Ratio
Ratio
—
—
1.5:1
1.9:1
—
—
Trise, Tfall
10% to 90% RF, 90% to 10% RF
ns
—
200
—
Ton, Toff
50% Control to 90% RF,50% Control to 10% RF
ns
—
200
—
Transients
In Band
mV
—
75
—
1 dB Compression
Input Power, 0.5 GHz
Input Power, 0.9 GHz
dBm
dBm
—
—
25
25
—
—
IP2
0.5 GHz
0.5 - 2.0 GHz
Measured Relative to Input
(for two-tone Input Power up to +5 dBm)
dBm
dBm
—
—
65
71
—
—
IP3
0.5 GHz
0.5 - 2.0 GHz
Measured Relative to Input
(for two-tone Input Power up to +5 dBm)
dBm
dBm
—
—
43
47
—
—
IC
Vc 5 V
µA
—
—
10
IVS
—
µA
—
—
20
± (0.15 dB + 5% of attenuation setting in dB) dB
± (0.3 dB + 5% of attenuation setting in dB) dB
4. External DC blocking capacitors are required on all RF ports. Loss varies at 0.003 dB/°C.
Absolute Maximum Ratings 5,6
Truth Table7
Parameter
Absolute Maximum
Input Power
50 MHz
500 - 2000 MHz
1
1
1
1
Reference Insertion Loss
+27 dBm
+34 dBm
1
1
1
0
2
Control Voltage
-0.5 V < VC < 8.5 V
1
1
0
1
4
Operating Temperature
-40°C to +85°C
1
0
1
1
8
Storage Temperature
-65°C to +150°C
0
1
1
1
16
0
0
0
0
30
5. Exceeding any one or combination of these limits may cause
permanent damage to this device.
6. MACOM does not recommend sustained operation near these
survivability limits.
VC1 VC2 VC3 VC4
Attenuation (dB)
7. 0 = 0 ± 0.2 V, 1 = +5 V
2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Rev. V7
Typical Performance Curves
VSWR
Insertion Loss
2.0
3.5
-40°C
+25°C
+85°C
3.0
IL
2 dB
4 dB
8 dB
16 dB
30 dB
1.8
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
2.5
3.0
Frequency (GHz)
Frequency (GHz)
Attenuation
Attenuation Accuracy
35
1.5
30
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
25
20
0.5
0.0
15
-0.5
10
2 dB
4 dB
8 dB
16 dB
30 dB
-1.0
5
0
0.5
-1.5
1.0
1.5
2.0
Frequency (GHz)
2.5
3.0
0.5
1.0
1.5
2.0
Frequency (GHz)
3
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Rev. V7
TSSOP-16
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
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT-264
Digital Attenuator, 4-Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Rev. V7
M/A-COM Technology Solutions Inc. All rights reserved.
Information in this document is provided in connection with M/A-COM Technology Solutions Inc ("MACOM")
products. These materials are provided by MACOM as a service to its customers and may be used for
informational purposes only. Except as provided in MACOM's Terms and Conditions of Sale for such products or
in any separate agreement related to this document, MACOM assumes no liability whatsoever. MACOM
assumes no responsibility for errors or omissions in these materials. MACOM may make changes to
specifications and product descriptions at any time, without notice. MACOM makes no commitment to update
the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future
changes to its specifications and product descriptions. No license, express or implied, by estoppels or otherwise,
to any intellectual property rights is granted by this document.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, RELATING TO SALE AND/OR USE OF MACOM PRODUCTS INCLUDING LIABILITY OR
WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR
INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR
OTHER INTELLECTUAL PROPERTY RIGHT. MACOM FURTHER DOES NOT WARRANT THE ACCURACY
OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN
THESE MATERIALS. MACOM SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS,
WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
MACOM products are not intended for use in medical, lifesaving or life sustaining applications. MACOM
customers using or selling MACOM products for use in such applications do so at their own risk and agree to
fully indemnify MACOM for any damages resulting from such improper use or sale.
5
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support