Low distortion (-120 dB), low noise (4.5nV/rtHz), dual audio op amp

The single-channel OPA1677,

dual-channel OPA1678, and quad-channel OPA1679 (OPA167x) op amps offer higher

system-level performance over legacy op amps commonly used in audio circuitry.

The OPA167x

amplifiers achieve a low 4.5-nV/√Hz noise density and low

distortion of 0.0001% at 1 kHz, which improves audio signal fidelity. These devices

also offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which

increases headroom and maximizes dynamic range.

To accommodate the power-supply

constraints of many types of audio products, the OPA167x operate over a very-wide

supply range of ±2.25 V to ±18 V (or 4.5 V to 36 V) on only 2 mA of supply current.

These op amps are unity-gain stable and have excellent dynamic behavior over a wide

range of load conditions, allowing the OPA167x to be used in many audio

circuits.

The OPA167x amplifiers use completely

independent internal circuitry for lowest crosstalk and freedom from interactions

between channels, even when overdriven or overloaded.