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 thats 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.

...
Read more Read less

Filters

Viewing 1 - 20 of 30 products
Results per page
Description Price 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 Stock No. 761-5444
Mfr. Part No.LM1972M/NOPB
£3.14
Each
Units
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 Stock No. 162-6172
Mfr. Part No.LM1972M/NOPB
£2.632
Each (In a Tube of 36)
Units
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 Stock No. 145-1329
Mfr. Part No.HMC624ALP4E
£6.968
Each (On a Reel of 50)
Units
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 Stock No. 862-6411
Mfr. Part No.HMC624ALP4E
£8.08
Each
Units
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 Stock No. 145-7843
Mfr. Part No.HMC653LP2E
£4.366
Each (On a Reel of 50)
Units
25dB 25GHz 3dB SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS Stock No. 862-6206
Mfr. Part No.HMC653LP2E
£5.33
Each
Units
25dB 25GHz 3dB SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS Stock No. 131-4665
Mfr. Part No.HMC306AMS10E
£3.55
Each
Units
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 Stock No. 168-4910
Mfr. Part No.HMC306AMS10E
£3.491
Each (On a Reel of 50)
Units
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 Stock No. 131-4666
Mfr. Part No.HMC629ALP4E
£12.40
Each
Units
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 Stock No. 168-4911
Mfr. Part No.HMC629ALP4E
£10.939
Each (On a Reel of 50)
Units
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 Stock No. 183-2446
Mfr. Part No.HMC802ALP3E
£4.685
Each (In a Pack of 2)
Units
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 Stock No. 183-2347
Mfr. Part No.HMC472ALP4E
£4.694
Each (On a Tape of 50)
Units
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 Stock No. 183-2534
Mfr. Part No.HMC624ALP4ETR
£7.97
Each
Units
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 Stock No. 183-2510
Mfr. Part No.HMC973ALP3E
£11.30
Each
Units
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 Stock No. 183-2575
Mfr. Part No.HMC653
£31.77
Each
Units
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 Stock No. 183-2354
Mfr. Part No.HMC624ALP4ETR
£4.95
Each (On a Reel of 500)
Units
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 Stock No. 183-2356
Mfr. Part No.HMC653
£27.437
Each (In a Bag of 50)
Units
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 Stock No. 160-2705
Mfr. Part No.HMC652LP2E
£4.596
Each (On a Reel of 50)
Units
2dB 25GHz - SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS Stock No. 862-6436
Mfr. Part No.HMC652LP2E
£5.33
Each
Units
2dB 25GHz - SMT 6 2.05 x 2.05 x 1mm 2.05mm 2.05mm 1mm - +85 °C - -40 °C Hittite
RS Stock No. 183-2592
Mfr. Part No.HMC470ALP3E
£9.44
Each
Units
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 -
Related Products
A range of broadband radio frequency attenuators from ...
Description:
A range of broadband radio frequency attenuators from Analog Devices in low cost leadless surface mount packages. The range includes fixed attenuators, voltage-controlled variable attenuators and digitally switched attenuators. The digitally switched attenuator devices feature Ga As MMIC technology with up to 31.5dB of attenuation in 0.5dB increments.
The HMC470A is a 5-bit digital attenuator with ...
Description:
The HMC470A is a 5-bit digital attenuator with a 31 dB attenuation control range in 1 dB steps. The HMC470A offers excellent attenuation accuracy and high input linearity over the specified frequency range from 100 MHz to 3 GHz. However, this digital attenuator features ACG pins for external ac grounding ...