Texas Instruments OPA1679
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.| Part No. | OPA1679 |
|---|---|
| Datasheet | OPA1679 Download |
| Manufacturer |  Texas Instruments |
| Description | Low-Distortion Audio Operational Amplifiers |
| Buy | Stock & Price |
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 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 unitygain stable and have excellent dynamic behavior over a wide range of load conditions allowing them to be used in many audio circuits.
