IC AUDIO 2 CIRCUIT 8VSSOP
• Low Noise: 4.5 nV/√Hz at 1 kHz
• Low Distortion: 0.0001% at 1 kHz
• High Open-Loop Gain: 114dB
• 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 and MSOP-8
Quad-Channel: SO-14 and TSSOP-14
• Analog Signal Conditioning
• Analog and Digital Mixers
• Audio Effects Pedals
• A/V Receivers
• Car Audio Systems
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 types of audio products. These op amps are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions allowing them 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.
The OPA167x temperature ranges are specified from –40°C to +85°C.
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