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.
