OPA1679

Product Folder Order Now Technical Documents Tools & Software Support & Community OPA1678, OPA1679 SBOS855C – FEBRUARY 2017 – REVISED JUNE 2019 OPA167x Low-Distortion Audio Operational Amplifiers 1 Features 1 Low noise: 4.5 nV/√Hz at 1 kHz Low distortion: 0.0001% at 1 kHz High open-loop gain: 114 dB High common-mode rejection: 110 dB Low quiescent current: – 2 mA per channel Low input bias current: 10 pA (typical) Slew rate: 9 V/μs Wide gain bandwidth: 16 MHz (G = 1) Unity-gain stable Rail-to-rail output Wide supply range: – ±2.25 V to ±18 V, or 4.5 V to 36 V Dual-channel and quad-channel versions Small package sizes: – Dual-channel: SO-8, MSOP-8, SON-8 – Quad-channel: SO-14, TSSOP-14, QFN-16 2 Applications Analog signal conditioning Analog and digital mixers Audio effects pedals A/V receivers Car audio systems 3 Description The OPA1678 (dual-channel) and OPA1679 (quadchannel) operational amplifiers offer higher systemlevel 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. They also offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. The OPA1678 and OPA1679 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 to accommodate the power supply constraints of many...