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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Beskrivning Pris 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-artikelnummer 183-2446
Tillv. art.nrHMC802ALP3E
VarumärkeAnalog Devices
54,08 kr
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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-artikelnummer 183-2363
Tillv. art.nrHMC973ALP3E
VarumärkeAnalog Devices
108,876 kr
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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-artikelnummer 761-5444
Tillv. art.nrLM1972M/NOPB
VarumärkeTexas Instruments
35,78 kr
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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-artikelnummer 183-2346
Tillv. art.nrHMC470ALP3E
VarumärkeAnalog Devices
102,761 kr
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31dB 3GHz 2dB LFCSP 16 3.1 x 3.1 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V +85 °C 3 V -40 °C -
RS-artikelnummer 183-2355
Tillv. art.nrHMC652
VarumärkeAnalog Devices
94,537 kr
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2dB 50GHz - Chip 6 0.45 x 0.42 x 0.1mm 0.45mm 0.42mm 0.1mm 5.6 V +85 °C - -55 °C -
RS-artikelnummer 139-1753
Tillv. art.nrHMC425ALP3E
VarumärkeAnalog Devices
235,96 kr
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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-artikelnummer 862-6411
Tillv. art.nrHMC624ALP4E
VarumärkeAnalog Devices
92,96 kr
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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-artikelnummer 183-2534
Tillv. art.nrHMC624ALP4ETR
VarumärkeAnalog Devices
99,47 kr
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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-artikelnummer 183-2354
Tillv. art.nrHMC624ALP4ETR
VarumärkeAnalog Devices
62,251 kr
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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-artikelnummer 160-2705
Tillv. art.nrHMC652LP2E
VarumärkeAnalog Devices
45,089 kr
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2dB 25GHz - SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS-artikelnummer 862-6206
Tillv. art.nrHMC653LP2E
VarumärkeAnalog Devices
58,11 kr
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25dB 25GHz 3dB SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS-artikelnummer 168-4910
Tillv. art.nrHMC306AMS10E
VarumärkeAnalog Devices
42,03 kr
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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-artikelnummer 145-7843
Tillv. art.nrHMC653LP2E
VarumärkeAnalog Devices
48,302 kr
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25dB 25GHz 3dB SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS-artikelnummer 183-2347
Tillv. art.nrHMC472ALP4E
VarumärkeAnalog Devices
52,203 kr
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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-artikelnummer 183-2592
Tillv. art.nrHMC470ALP3E
VarumärkeAnalog Devices
92,03 kr
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31dB 3GHz 2dB LFCSP 16 3.1 x 3.1 x 0.85mm 3.1mm 3.1mm 0.85mm 5 V +85 °C 3 V -40 °C -
RS-artikelnummer 183-2510
Tillv. art.nrHMC973ALP3E
VarumärkeAnalog Devices
128,42 kr
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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-artikelnummer 145-1329
Tillv. art.nrHMC624ALP4E
VarumärkeAnalog Devices
82,402 kr
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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-artikelnummer 183-2622
Tillv. art.nrHMC472ALP4E
VarumärkeAnalog Devices
64,365 kr
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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-artikelnummer 162-6172
Tillv. art.nrLM1972M/NOPB
VarumärkeTexas Instruments
29,828 kr
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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-artikelnummer 183-2356
Tillv. art.nrHMC653
VarumärkeAnalog Devices
110,708 kr
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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 -
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