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产品描述 (功能)

生产厂家

AB7020

3M™ EMI Absorber AB7000 Series

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Technical Data

August 2014

3M™ EMI Absorber AB7000 Series

Product Description

3M™ EMI Absorber AB7000 Series consists of a flexible polymer resin loaded with soft metal flakes. An acrylic

pressure-sensitive adhesive allows for easy application.

Features and Benefits

• Flexible, high permeability magnetic sheets

• One-sided acrylic pressure-sensitive adhesive

• Easily die cut into complex shapes

Applications

3M absorber AB7000 series is typically used for applications requiring EMI control and signal integrity improvement

in the 50MHz to 10 GHz range. It is a broadband EMI absorber designed to work in near-field applications inside

and around electronic devices and assemblies. Common applications include reduction of noise and crosstalk inside

mobile electronics, reduction of crosstalk and EMI on ribbon cables and flex cables, reduction of radiated IC noise

(applying absorber directly to the noisy IC), damping of radiation and oscillations inside shields and cavities, and

increasing signal integrity on high speed data lines through crosstalk reduction.

Attenuation and Power Loss

Many factors determine the true attenuation of an electromagnetic interference absorbing material, including shape and

thickness, intimacy of substrate contact, smoothness of application surface, strength and frequency of the EMI signal,

etc. Since 3M absorber AB7000 series is a near field absorber, attenuation characteristics tend to be very application

specific. Power loss characteristics are measured using a 5cm x 5cm square of 3M absorber AB7000 series placed

on a 50Ω microstrip line. The attenuation and noise dampening attained generally increases as the thickness of the

material increases.

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