Wednesday, September 06, 2006

 

Capacitors are a sound idea for audio design

Niobium oxide and tantalum capacitors manufactured by AVX provide high capacitance performance in audio applications.
Niobium oxide and tantalum capacitors manufactured by AVX provide high capacitance performance in audio applications. Delivering a clear and rich flow to headphones and speakerphones, the parts realise the low frequency response demanded by high quality audio equipment. OxiCap niobium oxide capacitors combine non-burning features and low-failure rates, presenting enhanced safety, reliability and performance in high-end audio applications such as flight audio systems.

A COTSplus version is currently under development for military radio.

NOJ OxiCap series (C case size, 220uF/4V) is widely used for audio applications in game consoles, notebooks, and entertainment systems.

Unlike aluminium devices, niobium oxide parts do not suffer from dry out, which typically occurs at continuous operating temperatures of between 40 and 85C.

Offering an MTBF in the range of 200 to 500khs, OxiCap performs 100 times better than aluminium electrolyte capacitors.

For space-constrained applications requiring high capacitance devices, T-case tantalum TLC series capacitors offer a capacitance of 220uF, a rated voltage of 3V and a maximum height of 1.2mm.

The T case is suitable for slim portable devices (PDAs, mobile phones, and similar handheld equipment).

Tantalum is often preferred to ceramic in audio applications as high CV MLCC capacitors have an associated piezoelectric effect, causing unwelcome noise at audio frequencies.

Thanks to high capacitance stability with temperature and applied DC voltage, tantalum technology is suitable for low and middle frequency coupling.

AVX tantalum and OxiCap capacitors are capable of withstanding three times reflow profile up to 260C.





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