Variable Attenuators

Variable attenuators are a type of radio frequency attenuator that permits the signal level to constantly change. Attenuators are devices that decrease the power of a signal without noticeably distorting its waveform. This protects circuitry from receiving a signal that’s too powerful. 


Variable attenuators are used when the signal level needs to be able to change frequently. This is useful when you don't know exactly what the final desired signal range is or when accuracy is not a priority. Attenuators can be thought of as the opposite of signal amplifiers. An amplifier increases signal power (or amplitude) while an attenuator decreases it. 


How do variable attenuators work?

The signal level of variable attenuators is altered either manually or remotely. 


In manual variable attenuators, the signal level is changed by physically controlling the device, using something like an adjustable screw control.


If they are controlled remotely, a motor or PIN diode uses variable voltage to change the signal.


Types of variable attenuators 

Variable attenuators come with PIN diodes or MESFETs (metal–semiconductor field-effect transistors) as resistors to modulate amplitude. They can use either balanced or unbalanced pi-pad or T-pad circuits. 


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Omschrijving Prijs Maximum Attenuation Maximum Frequency Maximum Insertion Loss Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature Minimum Operating Supply Voltage Minimum Operating Temperature
RS-stocknr. 162-6172
FabrikantnummerLM1972M/NOPB
2,956 €
Each (In a Tube of 36)
Aantal stuks
78dB 3MHz - Surface Mount SOIC W 20 13.005 x 7.595 x 2.286mm 13.01mm 7.595mm 2.286mm 12 V +70 °C 4.5 V 0 °C
RS-stocknr. 145-1329
FabrikantnummerHMC624ALP4E
FabrikantAnalog Devices
6,879 €
Each (On a Reel of 50)
Aantal stuks
31.5dB 6GHz 3.8dB Surface Mount SMT 24 4.1 x 4.1 x 0.95mm 4.1mm 4.1mm 0.95mm 5 V +85 °C - -40 °C
RS-stocknr. 183-2534
FabrikantnummerHMC624ALP4ETR
FabrikantAnalog Devices
8,47 €
Each
Aantal stuks
31.5dB 6GHz 3.8dB Surface Mount LFCSP 24 4.1 x 4.1 x 0.85mm 4.1mm 4.1mm 0.85mm 5 V +85 °C 3 V -40 °C
RS-stocknr. 183-2510
FabrikantnummerHMC973ALP3E
FabrikantAnalog Devices
12,03 €
Each
Aantal stuks
31dB 5GHz 5.6dB Surface Mount SMT 16 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C - -40 °C
RS-stocknr. 183-2592
FabrikantnummerHMC470ALP3E
FabrikantAnalog Devices
8,37 €
Each
Aantal stuks
31dB 3GHz 2dB Surface Mount LFCSP 16 3.1 x 3.1 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V +85 °C 3 V -40 °C
RS-stocknr. 160-2705
FabrikantnummerHMC652LP2E
FabrikantAnalog Devices
4,103 €
Each (On a Reel of 50)
Aantal stuks
2dB 25GHz - Surface Mount SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C
RS-stocknr. 183-2575
FabrikantnummerHMC653
FabrikantAnalog Devices
12,67 €
Each
Aantal stuks
3dB 50GHz - Surface Mount Chip 6 0.45 x 0.42 x 0.1mm 0.45mm 0.42mm 0.1mm 5.2 V +85 °C - -55 °C
RS-stocknr. 145-7843
FabrikantnummerHMC653LP2E
FabrikantAnalog Devices
4,395 €
Each (On a Reel of 50)
Aantal stuks
25dB 25GHz 3dB Surface Mount SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C
RS-stocknr. 862-6436
FabrikantnummerHMC652LP2E
FabrikantAnalog Devices
5,28 €
Each
Aantal stuks
2dB 25GHz - Surface Mount SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C
RS-stocknr. 761-5444
FabrikantnummerLM1972M/NOPB
3,46 €
Each
Aantal stuks
78dB 3MHz - Surface Mount SOIC W 20 13.005 x 7.595 x 2.286mm 13.01mm 7.595mm 2.286mm 12 V +70 °C 4.5 V 0 °C
RS-stocknr. 131-4665
FabrikantnummerHMC306AMS10E
FabrikantAnalog Devices
4,02 €
Each
Aantal stuks
15.5dB 3.8GHz 2.7dB Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C 3 V -40 °C
RS-stocknr. 168-4910
FabrikantnummerHMC306AMS10E
FabrikantAnalog Devices
3,916 €
Each (On a Reel of 50)
Aantal stuks
15.5dB 3.8GHz 2.7dB Surface Mount MSOP 10 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C 3 V -40 °C
RS-stocknr. 183-2446
FabrikantnummerHMC802ALP3E
FabrikantAnalog Devices
4,915 €
Each (In a Pack of 2)
Aantal stuks
20dB 10GHz 3.5dB Surface Mount SMT 16 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C - -40 °C
RS-stocknr. 131-4666
FabrikantnummerHMC629ALP4E
FabrikantAnalog Devices
12,94 €
Each
Aantal stuks
45dB 10GHz 3.75dB Surface Mount QFN 24 4.1 x 4.1 x 0.85mm 4.1mm 4.1mm 0.85mm 3 V, 5 V +85 °C - -40 °C
RS-stocknr. 862-6411
FabrikantnummerHMC624ALP4E
FabrikantAnalog Devices
8,47 €
Each
Aantal stuks
31.5dB 6GHz 3.8dB Surface Mount SMT 24 4.1 x 4.1 x 0.95mm 4.1mm 4.1mm 0.95mm 5 V +85 °C - -40 °C
RS-stocknr. 183-2354
FabrikantnummerHMC624ALP4ETR
FabrikantAnalog Devices
5,384 €
Each (On a Reel of 500)
Aantal stuks
31.5dB 6GHz 3.8dB Surface Mount LFCSP 24 4.1 x 4.1 x 0.85mm 4.1mm 4.1mm 0.85mm 5 V +85 °C 3 V -40 °C
RS-stocknr. 139-1741
FabrikantnummerHMC425ALP3E
FabrikantAnalog Devices
19,741 €
Each (On a Reel of 18)
Aantal stuks
31.5dB 8GHz 4.7dB Surface Mount QFN 16 3 x 3 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V dc +85 °C 3 V -40 °C
RS-stocknr. 183-2622
FabrikantnummerHMC472ALP4E
FabrikantAnalog Devices
5,855 €
Each (In a Pack of 2)
Aantal stuks
31.5dB 3.8GHz 3dB Surface Mount SMT 24 4.1 x 4.1 x 0.95mm 4.1mm 4.1mm 0.95mm 5 V +85 °C - -40 °C
RS-stocknr. 183-2557
FabrikantnummerHMC652
FabrikantAnalog Devices
12,45 €
Each
Aantal stuks
2dB 50GHz - Surface Mount Chip 6 0.45 x 0.42 x 0.1mm 0.45mm 0.42mm 0.1mm 5.6 V +85 °C - -55 °C
RS-stocknr. 139-1753
FabrikantnummerHMC425ALP3E
FabrikantAnalog Devices
21,48 €
Each
Aantal stuks
31.5dB 8GHz 4.7dB Surface Mount QFN 16 3 x 3 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V dc +85 °C 3 V -40 °C
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