Product details

Number of channels (#) 2 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.5 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 GBW (Typ) (MHz) 16 Slew rate (Typ) (V/us) 9 Rail-to-rail Out Vos (offset voltage @ 25 C) (Max) (mV) 2 Iq per channel (Typ) (mA) 2 Vn at 1 kHz (Typ) (nV/rtHz) 4.5 Features THD + N @ 1 kHz (Typ) (%) 0.0001 Rating Catalog Operating temperature range (C) -40 to 85 Output current (Typ) (mA) 50 Architecture FET CMRR (Typ) (dB) 110
Number of channels (#) 2 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.5 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 GBW (Typ) (MHz) 16 Slew rate (Typ) (V/us) 9 Rail-to-rail Out Vos (offset voltage @ 25 C) (Max) (mV) 2 Iq per channel (Typ) (mA) 2 Vn at 1 kHz (Typ) (nV/rtHz) 4.5 Features THD + N @ 1 kHz (Typ) (%) 0.0001 Rating Catalog Operating temperature range (C) -40 to 85 Output current (Typ) (mA) 50 Architecture FET CMRR (Typ) (dB) 110
SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (DRG) 8 9 mm² 3 x 3
  • 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
  • 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

The OPA1678 (dual-channel) and OPA1679 (quad-channel) operational amplifiers 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. 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 have 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.

 

The OPA1678 (dual-channel) and OPA1679 (quad-channel) operational amplifiers 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. 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 have 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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Technical documentation

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Type Title Date
* Data sheet OPA167x Low-Distortion Audio Operational Amplifiers datasheet (Rev. C) 24 Jun 2019
Application note Understanding Op Amp Noise in Audio Circuits 14 Jun 2021
Technical article No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems 11 Apr 2019
Application note Active-filtering circuit for audio DACs 16 Jan 2019
Application note Phantom Power with Operational Amplifiers (Rev. A) 09 Nov 2018
Technical article “Trust, but verify” SPICE model accuracy, part 3: slew rate and input clamping diodes 18 Sep 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article Amp up your cans: Is your op amp stable? (Part 2) 22 Jan 2016
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 2) 23 Dec 2014
Application note Compensate Transimpedance Amplifiers Intuitively (Rev. A) 30 Mar 2005

Design & development

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