High current noise suppression filters boost speaker quality
Using TDK’s proprietary low-distortion ferrite material, the latest additions to the MAF series of noise suppression filters by TDK are designed for audio lines.
The two MAF1608GAD-L multi-layer filters have a compact footprint of just 1.6 x 0.8mm and an insertion height of just 0.6mm. The MAF1608GAD121L and MAF1608GAD201L are able to suppress noise at cellular frequencies from 1GHz and Class D amplifier noises and ensure high attenuation quality. They offer rated currents of 3.2 and 2.3A and low DC resistances of typically just 0.021 and 0.045 Ohm. Impedance at 900MHz is 120 and 200 Ohm. The low DC resistance and high rated current of more than 2A makes the filters especially suitable for smart speakers and external speakers for tablets that require power levels of 2W or higher as well as for headphones and microphones.
The MAF series, including the new MAF1608GAD-L types, filters use a low-distortion ferrite material to suppress noise. The filters for speakers are claimed to significantly improve reception sensitivity and overcome the sound quality degradation that occurs when using conventional chip beads. The MAF1608GAD-L filters complement the MAF1005GAD types for headphones and the microphone lines of smartphones.
Both new filters are in mass production.
TDK is based in Tokyo, Japan. It was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s comprehensive portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic and MEMS sensors. In addition, TDK provides power supplies and energy devices and magnetic heads.
Products are marketed under the brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK focuses on demanding markets in the areas of information and communication technology and automotive, industrial and consumer electronics.
The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America.
