The OPA134 series are ultra-low distortion, low-noise operational amplifiers fully
specified for audio applications. A true FET input stage is incorporated to provide superior sound
quality and speed for exceptional audio performance. This, in combination with high output drive
capability and excellent DC performance, allows for use in a wide variety of demanding
applications. In addition, the OPA134 has a wide output swing, to within 1 V of the rails, allowing
increased headroom and making it ideal for use in any audio circuit.
The OPA134 SoundPlus™ audio operational amplifiers are
easy to use and free from phase-inversion and the overload problems often found in common FET-input
operational amplifiers. They can be operated from ±2.5-V to ±18-V power supplies. Input cascode
circuitry provides excellent common-mode rejection and maintains low input bias current over its
wide input voltage range, minimizing distortion. OPA134 series operational amplifiers are
unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions,
including high load capacitance. The dual and quad versions feature completely independent
circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.
Single and dual versions are available in 8-pin DIP and SO-8 surface-mount packages in
standard configurations. The quad is available in 14-pin DIP and SO-14 surface mount packages. All
are specified for –40°C to 85°C operation. A SPICE macromodel is available for design
analysis.
