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TDK TDK Electronics · TDK Europe

EMC components

September 4, 2018

High-current noise suppression filters for audio lines

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  • High rated current of up to 1.25 A and suited especially for external speakers
  • Low-distortion ferrite material enables high audio quality
  • Miniature IEC 1005 case size

TDK Corporation has expanded the MAF1005G series of noise suppression filters for audio lines with four new MAF1005GAD-D types, which, thanks to their low DC resistance, feature a high rated current of up to 1.25 A. The new types employ TDK's proprietary low-distortion ferrite that enables the new components to suppress noise at cellular frequencies from 600 MHz to 2.7 GHz and ensure high audio quality. Thanks to their high rated current, the new components are suitable especially for the audio lines for external speakers of smart­phones and other compact communication devices as well as for headphones and microphones.

Available in case size IEC 1005, the new noise suppression filters have miniaturized dimensions of just 1.0­ mm x 0.5­ mm x 0.5­ mm and feature a performance approaching that of the much larger MAF1608G series in IEC 1608. Mass production of the components starts in September 2018.

With this series extension, TDK now offers a broad lineup of noise suppression filters for cellular band frequencies, Class D amplifiers (100 MHz to 400 MHz) and FM band frequencies (66 MHz to 108 MHz). TDK will continue to expand its portfolio for more target band frequencies and further miniaturization.

Main applications

  • Audio lines especially for external speakers of smartphones, tablets and other compact communication devices as well as for headphones and microphones

Main features and benefits

  • Low DC resistance design for a high rated current of up to 1.25 A
  • Low-distortion ferrite material enables high audio quality
  • Miniature dimensions of 1.0 mm x 0.5 mm x 0.5 mm

Key data

TypeImpedance
at 900 MHz [Ω]
DC resistance
[Ω]
Max. rated current
[A]
MAF1005GAD251D2500.1101.25
MAF1005GAD401D4000.1601.0
MAF1005GAD571D5700.2000.9
MAF1005GAD701D7000.2700.8