Audio Op-amp Drops Distortion Rate To 000003%

A new dual, high-fidelity audio operational amplifier from National Semiconductor practically eliminates distortion, with total harmonic distortion plus noise (THD+N) of 0.00003%.

October 26, 2006

The LM4562 sets a new level of performance with its remarkably low distortion, low noise, high speed, wide operating voltage and high output drive, according to National. These features make the op-amp well-suited for professional and high-end audio applications such as audio/visual (AV) receivers, preamplifiers and mixers, as well as a range of 34V medical imaging and industrial applications. The LM4562 has a unique design, combining a high-speed, 6MHz, unity-gain bandwidth operational amplifier with a new, proprietary stereo audio power amplifier that offers all the key specifications needed for superior audio performance and signal conditioning. The op-amp features low-input noise density of 2.7nV/sqrt Hz at 217Hz, a 1/f noise corner of 60Hz and 600-Ohm output drive. To ensure that the most challenging high loads are driven without any noise compromise, the LM4562 has a slew rate of 20V/mu s and a 56MHz gain bandwidth. The dual op amp is available in 8-lead SOIC, dual in-line (DIP) and metal can packages. Single and quad versions of the op amp will be available in early 2007.

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