Product category:
Electromechanical Components
News Release from: Temex | Subject: AT27580 and AT27570 trimmers
Edited by the Electronicstalk Editorial
Team on 11 February 2004
Trimmers tackle high-performance
applications
A new family of surface mount multiturn gigahertz trimmer capacitors aims to meet the growing performance demands of RF and microwave circuits in power amplifiers, basestations and filter tuning.
A new family of surface mount multiturn gigahertz trimmer capacitors aims to meet the growing demands of high-performance RF and microwave circuits in applications such as power amplifiers, basestations and filter tuning The SM571 from Temex is a gigahertz trimmer with ultralinear capacitance variation, targeted at applications requiring very fine tuning to avoid sudden increases of capacitance when the rotor is close to its maximum or minimum position
This article was originally published on Electronicstalk on 31 Jan 2003 at 8.00am (UK)
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The device has a specified capacitance range from 0.8 to 6.0pF across operating voltages up to 500V DC.
Insulation resistance at normal operating voltages is higher than 10,000Mohm when the rotor is in the maximum position.
The trimmer is designed to withstand shocks of 100g for 6ms and vibration of 60g at 10-2000Hz with a capacitance change of less than 1% from the initial value.
The new gigahertz trimmer range also includes devices for applications where size and performance are critical.
The high quality dielectric ceramic used by Temex has enabled a 25-35% size reduction without sacrificing performance compared with standard gigahertz trimmers.
AT27580 has a capacitance range of 0.6-4.5pF over four turns and a length of 5.8mm.
AT27570 has a capacitance range of 0.8 to 8.0pF over eight turns and a length of 8.0mm.
The new trimmer capacitors have a temperature coefficient of -50 +/-75ppm/degC, and offer a Q factor better than 3000 at up to 250MHz, with the exception of ATX757 and ATSM570 series which offer a Q factor better than 3000 at up to 100MHz due to their greater range of capacitance.
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