AT-357
GaAs Digital Attenuator
31 dB, 5 - Bit, DC - 2 GHz
Rev. V4
Features
n
n
n
C-46
Attenuation 1 dB Steps to 31 dB
TTL Control Interface
Hermetic Connectorized Housing
Description
Electrical Specifications 1: TA = -55°C to +85°C
Parameter
Nominal Attenuation
Test Conditions
2
Frequency
Units
Min
Typ
Max
1 dB Steps to 31 dB
Attenuation Accuracy
DC - 1.0 GHz
1.0 - 2.0 GHz
± (0.2 dB +2% of Atten Setting in dB) dB)
± (0.2 dB +2% of Atten Setting in dB) dB)
VSWR
DC - .025 GHz
.025 - 0.5 GHz
0.2 - 2.0 GHz
0.5 - 1.0 GHz
Ratio
Ratio
Ratio
Ratio
—
—
—
—
—
—
—
—
2.2:1
1.8:1
1.5:1
1.4:1
Reference Insertion Loss
DC - 0.5 GHz
0.5 - 1.0 GHz
1.0 - 2.0 GHz
dB
dB
dB
—
—
—
—
—
—
5.5
6.0
6.5
Impedance
—
—
Ohms
—
50
—
Ton
Toff
50% CTL to 90% RF
50% CTL to 10% RF
—
—
ns
ns
—
—
160
80
—
—
Trise
Tfall
10% RF to 90% RF
90% RF to 10% RF
—
—
ns
ns
—
—
15
3
—
—
Transients
Unfiltered
—
mV
—
130
—
1 dB Compression
Input Power
0.5 - 2.0 GHz
0.05 GHz
dBm
dBm
—
—
28
15
—
—
IP2
Two-Tone Input Power up to +5 dBm
0.5 - 2.0 GHz
0.05 GHz
dBm
dBm
—
—
+55
+45
—
—
IP3
Two-Tone Input Power up to +5 dBm
0.5 - 2.0 GHz
0.05 GHz
dBm
dBm
—
—
+47
+28
—
—
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-357
GaAs Digital Attenuator
31 dB, 5 - Bit, DC - 2 GHz
Rev. V4
Electrical Specifications 1: TA = -55°C to +85°C
Parameter
Test Conditions
Frequency
Units
Min
Typ
Max
Bias Power
+15 VDC
-12 VDC
—
—
mA
mA
—
—
—
—
5
3
Vin Low (0)
Vin High (1)
0.0 to 0.8V
2.4 to 5.0V
—
—
µA
µA
—
—
—
—
1
1
Functional Schematic (Top View)
Truth Table
Control Input
4 dB
2 dB
1 dB
Attenuation
Setting
16 dB
8 dB
C1
C2
C3
C4
C5
0
0
0
0
0
Reference
1
0
0
0
0
1 dB
0
1
0
0
0
2 dB
0
0
1
0
0
4 dB
0
0
0
1
0
8 dB
0
0
0
0
1
16 dB
RF2
RF1
GND
GND
+15V
C1
C2
GND
GND
C3
C4
-12V
C5
Absolute Maximum Ratings
4
Parameter
Absolute Maximum
Max Input Power
0.05 GHz
0.5 - 2.0 GHz
+27 dBm
+32 dBm
Bias Votlage
+15V Supply (V+)
-12V Supply (V-)
-0.7V to +18V
-15V to +0.7V
Control Votlage
(V-) -2V to (V+) +2V
(or 30 mA, whichever comes first)
Operating Temperature
-55°C to +125°C
Storage Temperature
-65°C to +150°C
Any Combination
“1” = Logic High (TTL)
Sum of Bits Selected
“0” = Logic Low (TTL)
4. Operation of this device above any one of these parameters
may cause permanent damage.
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-357
GaAs Digital Attenuator
31 dB, 5 - Bit, DC - 2 GHz
Rev. V4
Typical Performance Curves
Attenuation Flatness vs. Frequency
VSWR vs. Frequency
Ref. Insertion Loss vs. Frequency
Ordering Information
Part Number
Package
AT-357 SMA
C-46
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-357
GaAs Digital Attenuator
31 dB, 5 - Bit, DC - 2 GHz
Rev. V4
M/A-COM Technology Solutions Inc. All rights reserved.
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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
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to any intellectual property rights is granted by this document.
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WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
4
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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.
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