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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Viewing 1 - 12 of 12 products
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Description Price 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
New
RS Stock No. 217-3723
Mfr. Part No.F1912NCGI
kr 57,78
Each (In a Pack of 2)
Units
33dB 4GHz 2dB Surface Mount VFQFPN 20 - - - - - - - -
New
RS Stock No. 217-3725
Mfr. Part No.F1950NBGI
kr 64,52
Each (In a Pack of 2)
Units
33dB 5GHz 1.9dB Surface Mount VFQFPN 24 - - - - - - - -
New
RS Stock No. 217-7940
Mfr. Part No.F1958NBGK
kr 41,367
Each (In a Tray of 490)
Units
16dB 4GHz 1.7dB Surface Mount QFN 24 - - - - - - - -
New
RS Stock No. 217-3731
Mfr. Part No.F2255NLGK
kr 37,204
Each (In a Tray of 624)
Units
34.6dB 3GHz 1.7dB Surface Mount VFQFPN 16 - - - - - - - -
New
RS Stock No. 217-7941
Mfr. Part No.F1958NBGK
kr 68,76
Each (In a Pack of 2)
Units
16dB 4GHz 1.7dB Surface Mount QFN 24 - - - - - - - -
New
RS Stock No. 217-3727
Mfr. Part No.F1956NBGI
kr 61,37
Each (In a Pack of 2)
Units
31.75dB 6GHz 2.2dB Surface Mount VFQFPN 32 - - - - - - - -
New
RS Stock No. 217-3730
Mfr. Part No.F2250NLGK
kr 68,38
Each (In a Pack of 2)
Units
33.6dB 6GHz 1.9dB Surface Mount VFQFPN 16 - - - - - - - -
New
RS Stock No. 217-3722
Mfr. Part No.F1912NCGI
kr 37,985
Each (In a Tray of 490)
Units
33dB 4GHz 2dB Surface Mount VFQFPN 20 - - - - - - - -
New
RS Stock No. 217-3724
Mfr. Part No.F1950NBGI
kr 42,278
Each (In a Tray of 490)
Units
33dB 5GHz 1.9dB Surface Mount VFQFPN 24 - - - - - - - -
New
RS Stock No. 217-3732
Mfr. Part No.F2255NLGK
kr 63,325
Each (In a Pack of 2)
Units
34.6dB 3GHz 1.7dB Surface Mount VFQFPN 16 - - - - - - - -
New
RS Stock No. 217-3726
Mfr. Part No.F1956NBGI
kr 41,757
Each (In a Tray of 490)
Units
31.75dB 6GHz 2.2dB Surface Mount VFQFPN 32 - - - - - - - -
New
RS Stock No. 217-3729
Mfr. Part No.F2250NLGK
kr 40,196
Each (In a Tray of 624)
Units
33.6dB 6GHz 1.9dB Surface Mount VFQFPN 16 - - - - - - - -