Product category:
Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: LM4562
Edited by the Electronicstalk Editorial
Team on 27 September 2006
Audio op amp drops distortion
Dual high-fidelity audio operational amplifier practically eliminates distortion, with total harmonic distortion plus noise of 0.00003%.
A new dual, high-fidelity audio operational amplifier from National Semiconductor Corp practically eliminates distortion, with total harmonic distortion plus noise (THD+N) of 0.00003% The LM4562 amplifier joins the recently introduced LM4702 high-voltage stereo driver as a member of National's new high-performance audio family
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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National's LM4562 sets a new level of performance with its remarkably low distortion, low noise, high speed, wide operating voltage and high output drive.
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.
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The op amp features low-input noise density of 2.7nV/(rt)Hz at 217Hz, a 1/f noise corner of 60Hz and 600ohm output drive.
To ensure that the most challenging high loads are driven without any noise compromise, the LM4562 has a slew rate of 20V/us 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.
The LM4562 is unity-gain stable over a wide supply range of plus or minus 2.5V to 17V and has output current capability of 45mA.
Over this supply range, the LM4562's input circuitry maintains common-mode and power-supply rejection rates (PSRR) of more than 108dB and a typical low input bias current of 10nA.
The op amp offers a full audio dynamic range maximised with an output stage.
This output stage can swing to within 1V of either power supply voltage when driving 2kohm loads or to within 1.5V when driving 600ohm loads.
The op amp retains its performance levels while driving capacitive loads as high as 100pF.
Its transparent, no-click, no-pop mute function forces the amplifier output into a quiescent state, saving power.
It also features thermal shutdown and output short-circuit protection.
Available now, the LM4562's standard SOIC package is priced at $2.35 each and the DIP package is priced at $2.29 each in 1000-unit quantities.
The metal can package is priced at $9.95 each in 100-unit quantities.
Lead-free package options that are compliant with the European RoHS Directive are also available.
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