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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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
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 217-3724
Référence fabricantF1950NBGI
3,599 €
Each (In a Tray of 490)
Unité
33dB 5GHz 1.9dB Surface Mount VFQFPN 24 - - - - - - - -
Nouveau
N° de stock RS 217-3731
Référence fabricantF2255NLGK
3,167 €
Each (In a Tray of 624)
Unité
34.6dB 3GHz 1.7dB Surface Mount VFQFPN 16 - - - - - - - -
Nouveau
N° de stock RS 217-3725
Référence fabricantF1950NBGI
5,49 €
Each (In a Pack of 2)
Unité
33dB 5GHz 1.9dB Surface Mount VFQFPN 24 - - - - - - - -
Nouveau
N° de stock RS 217-3732
Référence fabricantF2255NLGK
5,39 €
Each (In a Pack of 2)
Unité
34.6dB 3GHz 1.7dB Surface Mount VFQFPN 16 - - - - - - - -
Nouveau
N° de stock RS 217-3726
Référence fabricantF1956NBGI
3,555 €
Each (In a Tray of 490)
Unité
31.75dB 6GHz 2.2dB Surface Mount VFQFPN 32 - - - - - - - -
N° de stock RS 139-1753
Référence fabricantHMC425ALP3E
21,48 €
Each
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 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 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 183-2446
Référence fabricantHMC802ALP3E
4,915 €
Each (In a Pack of 2)
Unité
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
N° de stock RS 183-2354
Référence fabricantHMC624ALP4ETR
5,384 €
Each (On a Reel of 500)
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
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
N° de stock RS 183-2592
Référence fabricantHMC470ALP3E
8,37 €
Each
Unité
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
N° de stock RS 862-6436
Référence fabricantHMC652LP2E
5,18 €
Each
Unité
2dB 25GHz - Surface Mount SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C
N° de stock RS 145-1329
Référence fabricantHMC624ALP4E
7,063 €
Each (On a Reel of 50)
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
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 168-4911
Référence fabricantHMC629ALP4E
10,721 €
Each (On a Reel of 50)
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 160-2705
Référence fabricantHMC652LP2E
4,103 €
Each (On a Reel of 50)
Unité
2dB 25GHz - Surface Mount SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +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 - - - - - - - -
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 - - - - - - - -