TDK EMC components: High-current noise suppression filters for audio lines
Tomáš Zedníček
Posted On 4.9.2018
Source: TDK news
TDK Corporation (TSE:6762) 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
| Type | Impedance at 900 MHz [Ω] |
DC resistance [Ω] |
Max. rated current [A] |
|---|---|---|---|
| MAF1005GAD251D | 250 | 0.110 | 1.25 |
| MAF1005GAD401D | 400 | 0.160 | 1.0 |
| MAF1005GAD571D | 570 | 0.200 | 0.9 |
| MAF1005GAD701D | 700 | 0.270 | 0.8 |
