Analogue, Mixed Signal, LSI


Op-amp suits audio applications

29 April 2009 Analogue, Mixed Signal, LSI

The new AS1713 operational amplifier from austriamicrosystems is a high output differential line receiver with 10 MHz, 10 V/μs, rail-to-rail I/O performance, making it suitable for audio applications such as headphone drivers and audio line receivers and buffers.

The device operates from a single +2,7 V to +5,5 V supply and can swing to within 100 mV from the rails while sinking or sourcing 50 mA of output current. Large short-time loads, common in various applications such as in audio amplification, are supported by a peak output current of more than 200 mA. The IC requires only 1,6 mA of supply current and 1 nA while in shutdown.

The AS1713 offers a fixed differential voltage gain of 1. Internal matched resistors reduce external component count and costs and flexible interconnections support external gain setting and adjustments in other applications. The trimmed resistor network also allows the part to be used as a low cost, general purpose instrumentation amplifier. Gain and impedance conversion may be provided by adding an external dual amplifier to create the classic three amplifier IA (instrument amplifier) structure.



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