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 the circuitry from receiving a signal that is too powerful. RS Components offer a range of high-quality devices from leading brands including Analog Devices and Texas Instruments. Browse our range for all of your electronic application needs.

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.

Applications

Variable attenuators are used in various electronic applications in many industries. Some of the most common are

  • Mobile phone 3G infrastructure
  • Microwave and Radio
  • Test equipment and sensors
  • IF and RF applications

Our range of variable attenuators are available in industry-standard package types, pin counts and mounting types. With maximum attenuation levels ranging from 2 dB to 78 dB and maximum frequency ranging from 3 MHz to 50 GHz.


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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. 761-5444
FabrikantnummerLM1972M/NOPB
€ 3,56
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. 162-6172
FabrikantnummerLM1972M/NOPB
€ 3,018
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. 183-2622
FabrikantnummerHMC472ALP4E
FabrikantAnalog Devices
€ 5,83
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. 145-1329
FabrikantnummerHMC624ALP4E
FabrikantAnalog Devices
€ 7,063
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. 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. 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
Nieuw
RS-stocknr. 217-3723
FabrikantnummerF1912NCGI
€ 4,92
Each (In a Pack of 2)
Aantal stuks
33dB 4GHz 2dB Surface Mount VFQFPN 20 - - - - - - - -
RS-stocknr. 862-6206
FabrikantnummerHMC653LP2E
FabrikantAnalog Devices
€ 5,28
Each
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. 862-6411
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
Nieuw
RS-stocknr. 217-3722
FabrikantnummerF1912NCGI
€ 3,234
Each (In a Tray of 490)
Aantal stuks
33dB 4GHz 2dB Surface Mount VFQFPN 20 - - - - - - - -
Nieuw
RS-stocknr. 217-3730
FabrikantnummerF2250NLGK
€ 5,82
Each (In a Pack of 2)
Aantal stuks
33.6dB 6GHz 1.9dB Surface Mount VFQFPN 16 - - - - - - - -
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
Nieuw
RS-stocknr. 217-3724
FabrikantnummerF1950NBGI
€ 3,599
Each (In a Tray of 490)
Aantal stuks
33dB 5GHz 1.9dB Surface Mount VFQFPN 24 - - - - - - - -
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
Nieuw
RS-stocknr. 217-3725
FabrikantnummerF1950NBGI
€ 5,49
Each (In a Pack of 2)
Aantal stuks
33dB 5GHz 1.9dB Surface Mount VFQFPN 24 - - - - - - - -
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
Nieuw
RS-stocknr. 217-3732
FabrikantnummerF2255NLGK
€ 5,39
Each (In a Pack of 2)
Aantal stuks
34.6dB 3GHz 1.7dB Surface Mount VFQFPN 16 - - - - - - - -
RS-stocknr. 183-2517
FabrikantnummerHMC1119LP4ME
FabrikantAnalog Devices
€ 9,50
Each
Aantal stuks
- - - - - - - - - - - - - -
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
Nieuw
RS-stocknr. 217-3729
FabrikantnummerF2250NLGK
€ 3,422
Each (In a Tray of 624)
Aantal stuks
33.6dB 6GHz 1.9dB Surface Mount VFQFPN 16 - - - - - - - -