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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Nombre de résultats par page
Description Prix 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
Nouveau
N° de stock RS 217-7940
Référence fabricantF1958NBGK
3,522 €
Each (In a Tray of 490)
Unité
16dB 4GHz 1.7dB Surface Mount QFN 24 - - - - - - - -
N° de stock RS 183-2622
Référence fabricantHMC472ALP4E
5,83 €
Each (In a Pack of 2)
Unité
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
Nouveau
N° de stock RS 217-7941
Référence fabricantF1958NBGK
5,855 €
Each (In a Pack of 2)
Unité
16dB 4GHz 1.7dB Surface Mount QFN 24 - - - - - - - -
N° de stock RS 761-5444
Référence fabricantLM1972M/NOPB
3,56 €
Each
Unité
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
N° de stock RS 131-4666
Référence fabricantHMC629ALP4E
12,94 €
Each
Unité
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
N° de stock RS 862-6411
Référence fabricantHMC624ALP4E
8,47 €
Each
Unité
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
Nouveau
N° de stock RS 217-3727
Référence fabricantF1956NBGI
5,225 €
Each (In a Pack of 2)
Unité
31.75dB 6GHz 2.2dB Surface Mount VFQFPN 32 - - - - - - - -
N° de stock RS 183-2534
Référence fabricantHMC624ALP4ETR
8,47 €
Each
Unité
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
Nouveau
N° de stock RS 217-3723
Référence fabricantF1912NCGI
4,92 €
Each (In a Pack of 2)
Unité
33dB 4GHz 2dB Surface Mount VFQFPN 20 - - - - - - - -
N° de stock RS 145-7843
Référence fabricantHMC653LP2E
4,395 €
Each (On a Reel of 50)
Unité
25dB 25GHz 3dB Surface Mount SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C
N° de stock RS 183-2510
Référence fabricantHMC973ALP3E
12,03 €
Each
Unité
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
N° de stock RS 139-1741
Référence fabricantHMC425ALP3E
19,741 €
Each (On a Reel of 18)
Unité
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
N° de stock RS 183-2575
Référence fabricantHMC653
12,48 €
Each
Unité
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
N° de stock RS 183-2557
Référence fabricantHMC652
12,25 €
Each
Unité
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
Nouveau
N° de stock RS 217-3722
Référence fabricantF1912NCGI
3,234 €
Each (In a Tray of 490)
Unité
33dB 4GHz 2dB Surface Mount VFQFPN 20 - - - - - - - -