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 Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature Minimum Operating Supply Voltage Minimum Operating Temperature Series
RS-stocknr. 761-5444
FabrikantnummerLM1972M/NOPB
€ 3,46
Each
Aantal stuks
78dB 3MHz - 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
€ 2,885
Each (In a Tube of 36)
Aantal stuks
78dB 3MHz - 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. 183-2446
FabrikantnummerHMC802ALP3E
FabrikantAnalog Devices
€ 4,99
Each (In a Pack of 2)
Aantal stuks
20dB 10GHz 3.5dB SMT 16 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C - -40 °C -
RS-stocknr. 183-2356
FabrikantnummerHMC653
FabrikantAnalog Devices
€ 10,707
Each (In a Bag of 50)
Aantal stuks
3dB 50GHz - 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
€ 4,481
Each (On a Reel of 50)
Aantal stuks
25dB 25GHz 3dB SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS-stocknr. 183-2534
FabrikantnummerHMC624ALP4ETR
FabrikantAnalog Devices
€ 9,25
Each
Aantal stuks
31.5dB 6GHz 3.8dB 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. 131-4666
FabrikantnummerHMC629ALP4E
FabrikantAnalog Devices
€ 13,18
Each
Aantal stuks
45dB 10GHz 3.75dB 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. 183-2354
FabrikantnummerHMC624ALP4ETR
FabrikantAnalog Devices
€ 6,02
Each (On a Reel of 500)
Aantal stuks
31.5dB 6GHz 3.8dB 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. 145-1329
FabrikantnummerHMC624ALP4E
FabrikantAnalog Devices
€ 7,969
Each (On a Reel of 50)
Aantal stuks
31.5dB 6GHz 3.8dB SMT 24 4.1 x 4.1 x 0.95mm 4.1mm 4.1mm 0.95mm 5 V +85 °C - -40 °C Hittite
RS-stocknr. 183-2575
FabrikantnummerHMC653
FabrikantAnalog Devices
€ 36,85
Each
Aantal stuks
3dB 50GHz - 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. 862-6436
FabrikantnummerHMC652LP2E
FabrikantAnalog Devices
€ 5,37
Each
Aantal stuks
2dB 25GHz - SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS-stocknr. 168-4911
FabrikantnummerHMC629ALP4E
FabrikantAnalog Devices
€ 12,689
Each (On a Reel of 50)
Aantal stuks
45dB 10GHz 3.75dB 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. 183-2622
FabrikantnummerHMC472ALP4E
FabrikantAnalog Devices
€ 5,965
Each (In a Pack of 2)
Aantal stuks
31.5dB 3.8GHz 3dB SMT 24 4.1 x 4.1 x 0.95mm 4.1mm 4.1mm 0.95mm 5 V +85 °C - -40 °C -
RS-stocknr. 183-2361
FabrikantnummerHMC802ALP3E
FabrikantAnalog Devices
€ 4,051
Each (On a Tape of 50)
Aantal stuks
20dB 10GHz 3.5dB SMT 16 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C - -40 °C -
RS-stocknr. 183-2510
FabrikantnummerHMC973ALP3E
FabrikantAnalog Devices
€ 12,10
Each
Aantal stuks
31dB 5GHz 5.6dB SMT 16 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5 V +85 °C - -40 °C -
RS-stocknr. 168-4910
FabrikantnummerHMC306AMS10E
FabrikantAnalog Devices
€ 4,066
Each (On a Reel of 50)
Aantal stuks
15.5dB 3.8GHz 2.7dB 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. 139-1753
FabrikantnummerHMC425ALP3E
FabrikantAnalog Devices
€ 24,12
Each
Aantal stuks
31.5dB 8GHz 4.7dB QFN 16 3 x 3 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V dc +85 °C 3 V -40 °C LSB
RS-stocknr. 131-4665
FabrikantnummerHMC306AMS10E
FabrikantAnalog Devices
€ 4,18
Each
Aantal stuks
15.5dB 3.8GHz 2.7dB 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. 862-6206
FabrikantnummerHMC653LP2E
FabrikantAnalog Devices
€ 5,37
Each
Aantal stuks
25dB 25GHz 3dB SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS-stocknr. 139-1741
FabrikantnummerHMC425ALP3E
FabrikantAnalog Devices
€ 20,102
Each (On a Reel of 18)
Aantal stuks
31.5dB 8GHz 4.7dB QFN 16 3 x 3 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V dc +85 °C 3 V -40 °C LSB
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