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TDK Develops New Notch Filters

Moving forward, TDK will continue to expand its product lineup to meet the needs for diversified telecom applications.

TDK Corporation has developed AVRF041A150MT242 and AVRF061D2R4ST532 notch filters with ESD protection function.

TDK Notch FiltersThe new notch filters are compliant with the IEC61000-4-2 Level 4 immunity standard.

They are well suited to ensuring EMC requirements are met in the audio circuits of key applications – including smartphones, wireless earbuds (TWS), and smart speakers.

Thanks to TDK’s proprietary materials and advanced structural design, the new products implement industry-leading attenuation characteristics for specific frequency bands. They are highly effective at noise suppression and improved reception sensitivity in wireless communication.

Moreover, the products can simultaneously provide countermeasures against both noise and ESD via one single chip, both reducing costs and using less board real estate.

The AVRF041A150MT242 features a small footprint of only 0.4 x 0.2 x 0.2 ㎜ and delivers ESD protection and noise suppression in the 2.4 GHz bands. It has a maximum insertion loss of just -20㏈ at 2.4 Ghz.

The AVRF061D2R4ST532, which is supplied in 0.6 x 0.3 x 0.3 ㎜ form factor offers ESD protection and noise suppression in the frequency band up to 5.3㎓. At that frequency, it has a -15㏈ insertion loss.

With accelerating 5G transition and advanced mutual coordination between connected equipment, the era of IoT is nowhere. In addition to the conventional demands for lower power consumption and increased functionality, electronic equipment is required to have higher quality design and exhibit ongoing operational reliability.

By developing notch filter solutions with significantly smaller footprints and expanded frequency capabilities, TDK can address market expectations for more streamlined telecommunication devices, such as smartphones and TWS, while also expanding the frequency band concerning the latest generation of Wi-Fi transmissions.

Moving forward, TDK will continue to expand its product lineup to meet the needs for diversified telecom applications.

Main applications

  • Protection against noise and ESD for audio equipment using Wi-Fi, Bluetooth and other wireless forms of communication in the frequency band between 1.0 ㎓ and 5.3 ㎓

Main features and benefits

  • Providing measures for both ESD protection and noise
  • Compliant with IEC61000-4-2 Level 4
  • The smallest footprint in the lineup (0402 size format)

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Aishwarya Saxena

A book geek, with creative mind, an electronics degree, and zealous for writing.Creativity is the one thing in her opinion which drove her to enter into editing field. Allured towards south Indian cuisine and culture, love to discover new cultures and their customs. Relishes in discovering new music genres.

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